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OGRFeature Class Reference

A simple feature, including geometry and attributes. More...

`#include <ogr_feature.h>`

## Classes
class | ConstFieldIterator
| Field value iterator class. More...
class | FieldNotFoundException
| Exception raised by operator[](const char*) when a field is not found. More...
class | FieldValue
| Field value. More...

## Public Member Functions
| OGRFeature (OGRFeatureDefn *)
| Constructor. More...
ConstFieldIterator | begin () const
| Return begin of field value iterator. More...
ConstFieldIterator | end () const
| Return end of field value iterator. More...
const FieldValue | operator[] (int iField) const
| Return a field value. More...
FieldValue | operator[] (int iField)
| Return a field value. More...
const FieldValue | operator[] (const char *pszFieldName) const
| Return a field value. More...
FieldValue | operator[] (const char *pszFieldName)
| Return a field value. More...
OGRFeatureDefn * | GetDefnRef ()
| Fetch feature definition. More...
const OGRFeatureDefn * | GetDefnRef () const
| Fetch feature definition. More...
OGRErr | SetGeometryDirectly (OGRGeometry *)
| Set feature geometry. More...
OGRErr | SetGeometry (const OGRGeometry *)
| Set feature geometry. More...
OGRGeometry * | GetGeometryRef ()
| Fetch pointer to feature geometry. More...
const OGRGeometry * | GetGeometryRef () const
| Fetch pointer to feature geometry. More...
OGRGeometry * | StealGeometry () CPL_WARN_UNUSED_RESULT
| Take away ownership of geometry. More...
int | GetGeomFieldCount () const
| Fetch number of geometry fields on this feature. More...
OGRGeomFieldDefn * | GetGeomFieldDefnRef (int iField)
| Fetch definition for this geometry field. More...
const OGRGeomFieldDefn * | GetGeomFieldDefnRef (int iField) const
| Fetch definition for this geometry field. More...
int | GetGeomFieldIndex (const char *pszName) const
| Fetch the geometry field index given geometry field name. More...
OGRGeometry * | GetGeomFieldRef (int iField)
| Fetch pointer to feature geometry. More...
const OGRGeometry * | GetGeomFieldRef (int iField) const
| Fetch pointer to feature geometry. More...
OGRGeometry * | StealGeometry (int iField)
| Take away ownership of geometry. More...
OGRGeometry * | GetGeomFieldRef (const char *pszFName)
| Fetch pointer to feature geometry. More...
const OGRGeometry * | GetGeomFieldRef (const char *pszFName) const
| Fetch pointer to feature geometry. More...
OGRErr | SetGeomFieldDirectly (int iField, OGRGeometry *)
| Set feature geometry of a specified geometry field. More...
OGRErr | SetGeomField (int iField, const OGRGeometry *)
| Set feature geometry of a specified geometry field. More...
OGRFeature * | Clone () const CPL_WARN_UNUSED_RESULT
| Duplicate feature. More...
virtual OGRBoolean | Equal (const OGRFeature *poFeature) const
| Test if two features are the same. More...
int | GetFieldCount () const
| Fetch number of fields on this feature. More...
const OGRFieldDefn * | GetFieldDefnRef (int iField) const
| Fetch definition for this field. More...
OGRFieldDefn * | GetFieldDefnRef (int iField)
| Fetch definition for this field. More...
int | GetFieldIndex (const char *pszName) const
| Fetch the field index given field name. More...
int | IsFieldSet (int iField) const
| Test if a field has ever been assigned a value or not. More...
void | UnsetField (int iField)
| Clear a field, marking it as unset. More...
bool | IsFieldNull (int iField) const
| Test if a field is null. More...
void | SetFieldNull (int iField)
| Clear a field, marking it as null. More...
bool | IsFieldSetAndNotNull (int iField) const
| Test if a field is set and not null. More...
OGRField * | GetRawFieldRef (int i)
| Fetch a pointer to the internal field value given the index. More...
const OGRField * | GetRawFieldRef (int i) const
| Fetch a pointer to the internal field value given the index. More...
int | GetFieldAsInteger (int i) const
| Fetch field value as integer. More...
GIntBig | GetFieldAsInteger64 (int i) const
| Fetch field value as integer 64 bit. More...
double | GetFieldAsDouble (int i) const
| Fetch field value as a double. More...
const char * | GetFieldAsString (int i) const
| Fetch field value as a string. More...
const int * | GetFieldAsIntegerList (int i, int *pnCount) const
| Fetch field value as a list of integers. More...
const GIntBig * | GetFieldAsInteger64List (int i, int *pnCount) const
| Fetch field value as a list of 64 bit integers. More...
const double * | GetFieldAsDoubleList (int i, int *pnCount) const
| Fetch field value as a list of doubles. More...
char ** | GetFieldAsStringList (int i) const
| Fetch field value as a list of strings. More...
GByte * | GetFieldAsBinary (int i, int *pnCount) const
| Fetch field value as binary data. More...
int | GetFieldAsDateTime (int i, int *pnYear, int *pnMonth, int *pnDay, int *pnHour, int *pnMinute, int *pnSecond, int *pnTZFlag) const
| Fetch field value as date and time. More...
int | GetFieldAsDateTime (int i, int *pnYear, int *pnMonth, int *pnDay, int *pnHour, int *pnMinute, float *pfSecond, int *pnTZFlag) const
| Fetch field value as date and time. More...
char * | GetFieldAsSerializedJSon (int i) const
| Fetch field value as a serialized JSon object. More...
int | GetFieldAsInteger (const char *pszFName) const
| Fetch field value as integer. More...
GIntBig | GetFieldAsInteger64 (const char *pszFName) const
| Fetch field value as integer 64 bit. More...
double | GetFieldAsDouble (const char *pszFName) const
| Fetch field value as a double. More...
const char * | GetFieldAsString (const char *pszFName) const
| Fetch field value as a string. More...
const int * | GetFieldAsIntegerList (const char *pszFName, int *pnCount) const
| Fetch field value as a list of integers. More...
const GIntBig * | GetFieldAsInteger64List (const char *pszFName, int *pnCount) const
| Fetch field value as a list of 64 bit integers. More...
const double * | GetFieldAsDoubleList (const char *pszFName, int *pnCount) const
| Fetch field value as a list of doubles. More...
char ** | GetFieldAsStringList (const char *pszFName) const
| Fetch field value as a list of strings. More...
void | SetField (int i, int nValue)
| Set field to integer value. More...
void | SetField (int i, GIntBig nValue)
| Set field to 64 bit integer value. More...
void | SetField (int i, double dfValue)
| Set field to double value. More...
void | SetField (int i, const char *pszValue)
| Set field to string value. More...
void | SetField (int i, int nCount, const int *panValues)
| Set field to list of integers value. More...
void | SetField (int i, int nCount, const GIntBig *panValues)
| Set field to list of 64 bit integers value. More...
void | SetField (int i, int nCount, const double *padfValues)
| Set field to list of doubles value. More...
void | SetField (int i, const char *const *papszValues)
| Set field to list of strings value. More...
void | SetField (int i, OGRField *puValue)
| Set field. More...
void | SetField (int i, int nCount, const void *pabyBinary)
| Set field to binary data. More...
void | SetField (int i, int nYear, int nMonth, int nDay, int nHour=0, int nMinute=0, float fSecond=0.f, int nTZFlag=0)
| Set field to date. More...
void | SetField (const char *pszFName, int nValue)
| Set field to integer value. More...
void | SetField (const char *pszFName, GIntBig nValue)
| Set field to 64 bit integer value. More...
void | SetField (const char *pszFName, double dfValue)
| Set field to double value. More...
void | SetField (const char *pszFName, const char *pszValue)
| Set field to string value. More...
void | SetField (const char *pszFName, int nCount, const int *panValues)
| Set field to list of integers value. More...
void | SetField (const char *pszFName, int nCount, const GIntBig *panValues)
| Set field to list of 64 bit integers value. More...
void | SetField (const char *pszFName, int nCount, const double *padfValues)
| Set field to list of doubles value. More...
void | SetField (const char *pszFName, const char *const *papszValues)
| Set field to list of strings value. More...
void | SetField (const char *pszFName, OGRField *puValue)
| Set field. More...
void | SetField (const char *pszFName, int nYear, int nMonth, int nDay, int nHour=0, int nMinute=0, float fSecond=0.f, int nTZFlag=0)
| Set field to date. More...
GIntBig | GetFID () const
| Get feature identifier. More...
virtual OGRErr | SetFID (GIntBig nFIDIn)
| Set the feature identifier. More...
void | DumpReadable (FILE *, char **papszOptions=nullptr) const
| Dump this feature in a human readable form. More...
OGRErr | SetFrom (const OGRFeature *, int=TRUE)
| Set one feature from another. More...
OGRErr | SetFrom (const OGRFeature *, const int *, int=TRUE)
| Set one feature from another. More...
OGRErr | SetFieldsFrom (const OGRFeature *, const int *, int=TRUE)
| Set fields from another feature. More...
int | Validate (int nValidateFlags, int bEmitError) const
| Validate that a feature meets constraints of its schema. More...
void | FillUnsetWithDefault (int bNotNullableOnly, char **papszOptions)
| Fill unset fields with default values that might be defined. More...
virtual const char * | GetStyleString () const
| Fetch style string for this feature. More...
virtual void | SetStyleString (const char *)
| Set feature style string. More...
virtual void | SetStyleStringDirectly (char *)
| Set feature style string. More...
virtual OGRStyleTable * | GetStyleTable () const
| Return style table. More...
virtual void | SetStyleTable (OGRStyleTable *poStyleTable)
| Set style table. More...
virtual void | SetStyleTableDirectly (OGRStyleTable *poStyleTable)
| Set style table. More...
const char * | GetNativeData () const
| Returns the native data for the feature. More...
const char * | GetNativeMediaType () const
| Returns the native media type for the feature. More...
void | SetNativeData (const char *pszNativeData)
| Sets the native data for the feature. More...
void | SetNativeMediaType (const char *pszNativeMediaType)
| Sets the native media type for the feature. More...

## Static Public Member Functions
static OGRFeature * | CreateFeature (OGRFeatureDefn *)
| Feature factory. More...
static void | DestroyFeature (OGRFeature *)
| Destroy feature. More...
static OGRFeatureH | ToHandle (OGRFeature *poFeature)
| Convert a OGRFeature* to a OGRFeatureH. More...
static OGRFeature * | FromHandle (OGRFeatureH hFeature)
| Convert a OGRFeatureH to a OGRFeature*. More...

## Protected Member Functions
bool | CopySelfTo (OGRFeature *poNew) const
| Copies the innards of this OGRFeature into the supplied object. More...

## Detailed Description

A simple feature, including geometry and attributes.

## Constructor & Destructor Documentation

OGRFeature::OGRFeature | ( | OGRFeatureDefn * | poDefnIn | ) |
| explicit

Constructor.

Note that the OGRFeature will increment the reference count of its defining OGRFeatureDefn. Destruction of the OGRFeatureDefn before destruction of all OGRFeatures that depend on it is likely to result in a crash.

This method is the same as the C function OGR_F_Create().

Parameters

  poDefnIn | feature class (layer) definition to which the feature will adhere.

## Member Function Documentation

OGRFeature::ConstFieldIterator OGRFeature::begin | ( |  | ) | const

Return begin of field value iterator.

Using this iterator for standard range-based loops is safe, but due to implementation limitations, you shouldn't try to access (dereference) more than one iterator step at a time, since you will get a reference to the same object (FieldValue) at each iteration step.

    for( auto&& oField: poFeature )
    {
         std::cout << oField.GetIndex() << "," << oField.GetName()<< ": " << oField.GetAsString() << std::endl;
    }

Since
  GDAL 2.3

OGRFeature * OGRFeature::Clone | ( |  | ) | const

Duplicate feature.

The newly created feature is owned by the caller, and will have its own reference to the OGRFeatureDefn.

This method is the same as the C function OGR_F_Clone().

Returns
  new feature, exactly matching this feature. Or, starting with GDAL 2.1, NULL in case of out of memory situation.

bool OGRFeature::CopySelfTo | ( | OGRFeature * | poNew | ) | const
| protected

Copies the innards of this OGRFeature into the supplied object.

This is mainly intended to allow derived classes to implement their own Clone functions.

Parameters

  poNew | The object into which to copy the data of this object.

Returns
  True if successful, false if the copy failed.

OGRFeature * OGRFeature::CreateFeature | ( | OGRFeatureDefn * | poDefn | ) |
| static

Feature factory.

This is essentially a feature factory, useful for applications creating features but wanting to ensure they are created out of the OGR/GDAL heap.

This method is the same as the C function OGR_F_Create().

Parameters

  poDefn | Feature definition defining schema.

Returns
  new feature object with null fields and no geometry, or, starting with GDAL 2.1, NULL in case of out of memory situation. May be deleted with DestroyFeature().

void OGRFeature::DestroyFeature | ( | OGRFeature * | poFeature | ) |
| static

Destroy feature.

The feature is deleted, but within the context of the GDAL/OGR heap. This is necessary when higher level applications use GDAL/OGR from a DLL and they want to delete a feature created within the DLL. If the delete is done in the calling application the memory will be freed onto the application heap which is inappropriate.

This method is the same as the C function OGR_F_Destroy().

Parameters

  poFeature | the feature to delete.

void OGRFeature::DumpReadable | ( | FILE * | fpOut,
|  | char ** | papszOptions = `nullptr`
| ) |  | const

Dump this feature in a human readable form.

This dumps the attributes, and geometry; however, it doesn't definition information (other than field types and names), nor does it report the geometry spatial reference system.

A few options can be defined to change the default dump :

- DISPLAY_FIELDS=NO : to hide the dump of the attributes
- DISPLAY_STYLE=NO : to hide the dump of the style string
- DISPLAY_GEOMETRY=NO : to hide the dump of the geometry
- DISPLAY_GEOMETRY=SUMMARY : to get only a summary of the geometry

This method is the same as the C function OGR_F_DumpReadable().

Parameters

  fpOut | the stream to write to, such as stdout. If NULL stdout will be used.
  papszOptions | NULL terminated list of options (may be NULL)

OGRFeature::ConstFieldIterator OGRFeature::end | ( |  | ) | const

Return end of field value iterator.

OGRBoolean OGRFeature::Equal | ( | const OGRFeature * | poFeature | ) | const
| virtual

Test if two features are the same.

Two features are considered equal if the share them (pointer equality) same OGRFeatureDefn, have the same field values, and the same geometry (as tested by OGRGeometry::Equal()) as well as the same feature id.

This method is the same as the C function OGR_F_Equal().

Parameters

  poFeature | the other feature to test this one against.

Returns
  TRUE if they are equal, otherwise FALSE.

void OGRFeature::FillUnsetWithDefault | ( | int | bNotNullableOnly,
|  | char ** | papszOptions
| ) |  |

Fill unset fields with default values that might be defined.

This method is the same as the C function OGR_F_FillUnsetWithDefault().

Parameters

  bNotNullableOnly | if we should fill only unset fields with a not-null constraint.
  papszOptions | unused currently. Must be set to NULL.

Since
  GDAL 2.0

static OGRFeature* OGRFeature::FromHandle | ( | OGRFeatureH | hFeature | ) |
| inline static

Convert a OGRFeatureH to a OGRFeature*.

Since
  GDAL 2.3

OGRFeatureDefn * OGRFeature::GetDefnRef | ( |  | ) |
| inline

Fetch feature definition.

This method is the same as the C function OGR_F_GetDefnRef().

Returns
  a reference to the feature definition object.

const OGRFeatureDefn * OGRFeature::GetDefnRef | ( |  | ) | const
| inline

Fetch feature definition.

This method is the same as the C function OGR_F_GetDefnRef().

Returns
  a reference to the feature definition object.

Since
  GDAL 2.3

GIntBig OGRFeature::GetFID | ( |  | ) | const
| inline

Get feature identifier.

This method is the same as the C function OGR_F_GetFID(). Note: since GDAL 2.0, this method returns a GIntBig (previously a long)

Returns
  feature id or OGRNullFID if none has been assigned.

GByte * OGRFeature::GetFieldAsBinary | ( | int | iField,
|  | int * | pnBytes
| ) |  | const

Fetch field value as binary data.

This method only works for OFTBinary and OFTString fields.

This method is the same as the C function OGR_F_GetFieldAsBinary().

Parameters

  iField | the field to fetch, from 0 to GetFieldCount()-1.
  pnBytes | location to put the number of bytes returned.

Returns
  the field value. This data is internal, and should not be modified, or freed. Its lifetime may be very brief.

int OGRFeature::GetFieldAsDateTime | ( | int | iField,
|  | int * | pnYear,
|  | int * | pnMonth,
|  | int * | pnDay,
|  | int * | pnHour,
|  | int * | pnMinute,
|  | int * | pnSecond,
|  | int * | pnTZFlag
| ) |  | const

Fetch field value as date and time.

Currently this method only works for OFTDate, OFTTime and OFTDateTime fields.

This method is the same as the C function OGR_F_GetFieldAsDateTime().

Parameters

  iField | the field to fetch, from 0 to GetFieldCount()-1.
  pnYear | (including century)
  pnMonth | (1-12)
  pnDay | (1-31)
  pnHour | (0-23)
  pnMinute | (0-59)
  pnSecond | (0-59)
  pnTZFlag | (0=unknown, 1=localtime, 100=GMT, see data model for details)

Returns
  TRUE on success or FALSE on failure.

int OGRFeature::GetFieldAsDateTime | ( | int | iField,
|  | int * | pnYear,
|  | int * | pnMonth,
|  | int * | pnDay,
|  | int * | pnHour,
|  | int * | pnMinute,
|  | float * | pfSecond,
|  | int * | pnTZFlag
| ) |  | const

Fetch field value as date and time.

Currently this method only works for OFTDate, OFTTime and OFTDateTime fields.

This method is the same as the C function OGR_F_GetFieldAsDateTime().

Parameters

  iField | the field to fetch, from 0 to GetFieldCount()-1.
  pnYear | (including century)
  pnMonth | (1-12)
  pnDay | (1-31)
  pnHour | (0-23)
  pnMinute | (0-59)
  pfSecond | (0-59 with millisecond accuracy)
  pnTZFlag | (0=unknown, 1=localtime, 100=GMT, see data model for details)

Returns
  TRUE on success or FALSE on failure.

double OGRFeature::GetFieldAsDouble | ( | int | iField | ) | const

Fetch field value as a double.

OFTString features will be translated using CPLAtof(). OFTInteger and OFTInteger64 fields will be cast to double. Other field types, or errors will result in a return value of zero.

This method is the same as the C function OGR_F_GetFieldAsDouble().

Parameters

  iField | the field to fetch, from 0 to GetFieldCount()-1.

Returns
  the field value.

OGRFeature::GetFieldAsDouble | ( | const char * | pszFName | ) | const
| inline

Fetch field value as a double.

OFTString features will be translated using CPLAtof(). OFTInteger and OFTInteger64 fields will be cast to double. Other field types, or errors will result in a return value of zero.

Parameters

  pszFName | the name of the field to fetch.

Returns
  the field value.

const double * OGRFeature::GetFieldAsDoubleList | ( | int | iField,
|  | int * | pnCount
| ) |  | const

Fetch field value as a list of doubles.

Currently this method only works for OFTRealList fields.

This method is the same as the C function OGR_F_GetFieldAsDoubleList().

Parameters

  iField | the field to fetch, from 0 to GetFieldCount()-1.
  pnCount | an integer to put the list count (number of doubles) into.

Returns
  the field value. This list is internal, and should not be modified, or freed. Its lifetime may be very brief. If *pnCount is zero on return the returned pointer may be NULL or non-NULL.

OGRFeature::GetFieldAsDoubleList | ( | const char * | pszFName,
|  | int * | pnCount
| ) |  | const
| inline

Fetch field value as a list of doubles.

Currently this method only works for OFTRealList fields.

Parameters

  pszFName | the name of the field to fetch.
  pnCount | an integer to put the list count (number of doubles) into.

Returns
  the field value. This list is internal, and should not be modified, or freed. Its lifetime may be very brief. If *pnCount is zero on return the returned pointer may be NULL or non-NULL.

int OGRFeature::GetFieldAsInteger | ( | int | iField | ) | const

Fetch field value as integer.

OFTString features will be translated using atoi(). OFTReal fields will be cast to integer. OFTInteger64 are demoted to 32 bit, with clamping if out-of-range. Other field types, or errors will result in a return value of zero.

This method is the same as the C function OGR_F_GetFieldAsInteger().

Parameters

  iField | the field to fetch, from 0 to GetFieldCount()-1.

Returns
  the field value.

OGRFeature::GetFieldAsInteger | ( | const char * | pszFName | ) | const
| inline

Fetch field value as integer.

OFTString features will be translated using atoi(). OFTReal fields will be cast to integer. OFTInteger64 are demoted to 32 bit, with clamping if out-of-range. Other field types, or errors will result in a return value of zero.

Parameters

  pszFName | the name of the field to fetch.

Returns
  the field value.

GIntBig OGRFeature::GetFieldAsInteger64 | ( | int | iField | ) | const

Fetch field value as integer 64 bit.

OFTInteger are promoted to 64 bit. OFTString features will be translated using CPLAtoGIntBig(). OFTReal fields will be cast to integer. Other field types, or errors will result in a return value of zero.

This method is the same as the C function OGR_F_GetFieldAsInteger64().

Parameters

  iField | the field to fetch, from 0 to GetFieldCount()-1.

Returns
  the field value.

Since
  GDAL 2.0

OGRFeature::GetFieldAsInteger64 | ( | const char * | pszFName | ) | const
| inline

Fetch field value as integer 64 bit.

OFTInteger are promoted to 64 bit. OFTString features will be translated using CPLAtoGIntBig(). OFTReal fields will be cast to integer. Other field types, or errors will result in a return value of zero.

Parameters

  pszFName | the name of the field to fetch.

Returns
  the field value.

const GIntBig * OGRFeature::GetFieldAsInteger64List | ( | int | iField,
|  | int * | pnCount
| ) |  | const

Fetch field value as a list of 64 bit integers.

Currently this method only works for OFTInteger64List fields.

This method is the same as the C function OGR_F_GetFieldAsInteger64List().

Parameters

  iField | the field to fetch, from 0 to GetFieldCount()-1.
  pnCount | an integer to put the list count (number of integers) into.

Returns
  the field value. This list is internal, and should not be modified, or freed. Its lifetime may be very brief. If *pnCount is zero on return the returned pointer may be NULL or non-NULL.

Since
  GDAL 2.0

OGRFeature::GetFieldAsInteger64List | ( | const char * | pszFName,
|  | int * | pnCount
| ) |  | const
| inline

Fetch field value as a list of 64 bit integers.

Currently this method only works for OFTInteger64List fields.

Parameters

  pszFName | the name of the field to fetch.
  pnCount | an integer to put the list count (number of integers) into.

Returns
  the field value. This list is internal, and should not be modified, or freed. Its lifetime may be very brief. If *pnCount is zero on return the returned pointer may be NULL or non-NULL.

Since
  GDAL 2.0

const int * OGRFeature::GetFieldAsIntegerList | ( | int | iField,
|  | int * | pnCount
| ) |  | const

Fetch field value as a list of integers.

Currently this method only works for OFTIntegerList fields.

This method is the same as the C function OGR_F_GetFieldAsIntegerList().

Parameters

  iField | the field to fetch, from 0 to GetFieldCount()-1.
  pnCount | an integer to put the list count (number of integers) into.

Returns
  the field value. This list is internal, and should not be modified, or freed. Its lifetime may be very brief. If *pnCount is zero on return the returned pointer may be NULL or non-NULL.

OGRFeature::GetFieldAsIntegerList | ( | const char * | pszFName,
|  | int * | pnCount
| ) |  | const
| inline

Fetch field value as a list of integers.

Currently this method only works for OFTIntegerList fields.

Parameters

  pszFName | the name of the field to fetch.
  pnCount | an integer to put the list count (number of integers) into.

Returns
  the field value. This list is internal, and should not be modified, or freed. Its lifetime may be very brief. If *pnCount is zero on return the returned pointer may be NULL or non-NULL. OFTReal and OFTInteger fields will be translated to string using sprintf(), but not necessarily using the established formatting rules. Other field types, or errors will result in a return value of zero.

char * OGRFeature::GetFieldAsSerializedJSon | ( | int | iField | ) | const

Fetch field value as a serialized JSon object.

Currently this method only works for OFTStringList, OFTIntegerList, OFTInteger64List and OFTRealList

Parameters

  iField | the field to fetch, from 0 to GetFieldCount()-1.

Returns
  a string that must be de-allocate with CPLFree()

Since
  GDAL 2.2

const char * OGRFeature::GetFieldAsString | ( | int | iField | ) | const

Fetch field value as a string.

OFTReal and OFTInteger fields will be translated to string using sprintf(), but not necessarily using the established formatting rules. Other field types, or errors will result in a return value of zero.

This method is the same as the C function OGR_F_GetFieldAsString().

Parameters

  iField | the field to fetch, from 0 to GetFieldCount()-1.

Returns
  the field value. This string is internal, and should not be modified, or freed. Its lifetime may be very brief.

OGRFeature::GetFieldAsString | ( | const char * | pszFName | ) | const
| inline

Fetch field value as a string.

OFTReal and OFTInteger fields will be translated to string using sprintf(), but not necessarily using the established formatting rules. Other field types, or errors will result in a return value of zero.

Parameters

  pszFName | the name of the field to fetch.

Returns
  the field value. This string is internal, and should not be modified, or freed. Its lifetime may be very brief.

char ** OGRFeature::GetFieldAsStringList | ( | int | iField | ) | const

Fetch field value as a list of strings.

Currently this method only works for OFTStringList fields.

The returned list is terminated by a NULL pointer. The number of elements can also be calculated using CSLCount().

This method is the same as the C function OGR_F_GetFieldAsStringList().

Parameters

  iField | the field to fetch, from 0 to GetFieldCount()-1.

Returns
  the field value. This list is internal, and should not be modified, or freed. Its lifetime may be very brief.

OGRFeature::GetFieldAsStringList | ( | const char * | pszFName | ) | const
| inline

Fetch field value as a list of strings.

Currently this method only works for OFTStringList fields.

The returned list is terminated by a NULL pointer. The number of elements can also be calculated using CSLCount().

Parameters

  pszFName | the name of the field to fetch.

Returns
  the field value. This list is internal, and should not be modified, or freed. Its lifetime may be very brief.

int OGRFeature::GetFieldCount | ( |  | ) | const
| inline

Fetch number of fields on this feature.

This will always be the same as the field count for the OGRFeatureDefn.

This method is the same as the C function OGR_F_GetFieldCount().

Returns
  count of fields.

const OGRFieldDefn * OGRFeature::GetFieldDefnRef | ( | int | iField | ) | const
| inline

Fetch definition for this field.

This method is the same as the C function OGR_F_GetFieldDefnRef().

Parameters

  iField | the field to fetch, from 0 to GetFieldCount()-1.

Returns
  the field definition (from the OGRFeatureDefn). This is an internal reference, and should not be deleted or modified.

Since
  GDAL 2.3

OGRFieldDefn * OGRFeature::GetFieldDefnRef | ( | int | iField | ) |
| inline

Fetch definition for this field.

This method is the same as the C function OGR_F_GetFieldDefnRef().

Parameters

  iField | the field to fetch, from 0 to GetFieldCount()-1.

Returns
  the field definition (from the OGRFeatureDefn). This is an internal reference, and should not be deleted or modified.

int OGRFeature::GetFieldIndex | ( | const char * | pszName | ) | const
| inline

Fetch the field index given field name.

This is a cover for the OGRFeatureDefn::GetFieldIndex() method.

This method is the same as the C function OGR_F_GetFieldIndex().

Parameters

  pszName | the name of the field to search for.

Returns
  the field index, or -1 if no matching field is found.

OGRGeometry * OGRFeature::GetGeometryRef | ( |  | ) |

Fetch pointer to feature geometry.

This method is essentially the same as the C function OGR_F_GetGeometryRef(). (the only difference is that the C function honours OGRGetNonLinearGeometriesEnabledFlag())

Starting with GDAL 1.11, this is equivalent to calling OGRFeature::GetGeomFieldRef(0).

Returns
  pointer to internal feature geometry. This object should not be modified.

const OGRGeometry * OGRFeature::GetGeometryRef | ( |  | ) | const

Fetch pointer to feature geometry.

This method is essentially the same as the C function OGR_F_GetGeometryRef(). (the only difference is that the C function honours OGRGetNonLinearGeometriesEnabledFlag())

Returns
  pointer to internal feature geometry. This object should not be modified.

Since
  GDAL 2.3

int OGRFeature::GetGeomFieldCount | ( |  | ) | const
| inline

Fetch number of geometry fields on this feature.

This will always be the same as the geometry field count for the OGRFeatureDefn.

This method is the same as the C function OGR_F_GetGeomFieldCount().

Returns
  count of geometry fields.

Since
  GDAL 1.11

OGRGeomFieldDefn * OGRFeature::GetGeomFieldDefnRef | ( | int | iGeomField | ) |
| inline

Fetch definition for this geometry field.

This method is the same as the C function OGR_F_GetGeomFieldDefnRef().

Parameters

  iGeomField | the field to fetch, from 0 to GetGeomFieldCount()-1.

Returns
  the field definition (from the OGRFeatureDefn). This is an internal reference, and should not be deleted or modified.

Since
  GDAL 1.11

const OGRGeomFieldDefn * OGRFeature::GetGeomFieldDefnRef | ( | int | iGeomField | ) | const
| inline

Fetch definition for this geometry field.

This method is the same as the C function OGR_F_GetGeomFieldDefnRef().

Parameters

  iGeomField | the field to fetch, from 0 to GetGeomFieldCount()-1.

Returns
  the field definition (from the OGRFeatureDefn). This is an internal reference, and should not be deleted or modified.

Since
  GDAL 2.3

int OGRFeature::GetGeomFieldIndex | ( | const char * | pszName | ) | const
| inline

Fetch the geometry field index given geometry field name.

This is a cover for the OGRFeatureDefn::GetGeomFieldIndex() method.

This method is the same as the C function OGR_F_GetGeomFieldIndex().

Parameters

  pszName | the name of the geometry field to search for.

Returns
  the geometry field index, or -1 if no matching geometry field is found.

Since
  GDAL 1.11

OGRGeometry * OGRFeature::GetGeomFieldRef | ( | int | iField | ) |

Fetch pointer to feature geometry.

This method is the same as the C function OGR_F_GetGeomFieldRef().

Parameters

  iField | geometry field to get.

Returns
  pointer to internal feature geometry. This object should not be modified.

Since
  GDAL 1.11

const OGRGeometry * OGRFeature::GetGeomFieldRef | ( | int | iField | ) | const

Fetch pointer to feature geometry.

This method is the same as the C function OGR_F_GetGeomFieldRef().

Parameters

  iField | geometry field to get.

Returns
  pointer to internal feature geometry. This object should not be modified.

Since
  GDAL 2.3

OGRGeometry * OGRFeature::GetGeomFieldRef | ( | const char * | pszFName | ) |

Fetch pointer to feature geometry.

Parameters

  pszFName | name of geometry field to get.

Returns
  pointer to internal feature geometry. This object should not be modified.

Since
  GDAL 1.11

const OGRGeometry * OGRFeature::GetGeomFieldRef | ( | const char * | pszFName | ) | const

Fetch pointer to feature geometry.

Parameters

  pszFName | name of geometry field to get.

Returns
  pointer to internal feature geometry. This object should not be modified.

Since
  GDAL 2.3

const char * OGRFeature::GetNativeData | ( |  | ) | const
| inline

Returns the native data for the feature.

The native data is the representation in a "natural" form that comes from the driver that created this feature, or that is aimed at an output driver. The native data may be in different format, which is indicated by GetNativeMediaType().

Note that most drivers do not support storing the native data in the feature object, and if they do, generally the NATIVE_DATA open option must be passed at dataset opening.

The "native data" does not imply it is something more performant or powerful than what can be obtained with the rest of the API, but it may be useful in round-tripping scenarios where some characteristics of the underlying format are not captured otherwise by the OGR abstraction.

This function is the same as the C function OGR_F_GetNativeData().

Returns
  a string with the native data, or NULL if there is none.

Since
  GDAL 2.1

See also
  https://trac.osgeo.org/gdal/wiki/rfc60_improved_roundtripping_in_ogr

const char * OGRFeature::GetNativeMediaType | ( |  | ) | const
| inline

Returns the native media type for the feature.

The native media type is the identifier for the format of the native data. It follows the IANA RFC 2045 (see https://en.wikipedia.org/wiki/Media_type), e.g. "application/vnd.geo+json" for JSon.

This function is the same as the C function OGR_F_GetNativeMediaType().

Returns
  a string with the native media type, or NULL if there is none.

Since
  GDAL 2.1

See also
  https://trac.osgeo.org/gdal/wiki/rfc60_improved_roundtripping_in_ogr

OGRField * OGRFeature::GetRawFieldRef | ( | int | iField | ) |
| inline

Fetch a pointer to the internal field value given the index.

This method is the same as the C function OGR_F_GetRawFieldRef().

Parameters

  iField | the field to fetch, from 0 to GetFieldCount()-1.

Returns
  the returned pointer is to an internal data structure, and should not be freed, or modified.

const OGRField * OGRFeature::GetRawFieldRef | ( | int | iField | ) | const
| inline

Fetch a pointer to the internal field value given the index.

This method is the same as the C function OGR_F_GetRawFieldRef().

Parameters

  iField | the field to fetch, from 0 to GetFieldCount()-1.

Returns
  the returned pointer is to an internal data structure, and should not be freed, or modified.

Since
  GDAL 2.3

const char * OGRFeature::GetStyleString | ( |  | ) | const
| virtual

Fetch style string for this feature.

Set the OGR Feature Style Specification for details on the format of this string, and ogr_featurestyle.h for services available to parse it.

This method is the same as the C function OGR_F_GetStyleString().

Returns
  a reference to a representation in string format, or NULL if there isn't one.

virtual OGRStyleTable* OGRFeature::GetStyleTable | ( |  | ) | const
| inline virtual

Return style table.

Returns
  style table.

bool OGRFeature::IsFieldNull | ( | int | iField | ) | const

Test if a field is null.

This method is the same as the C function OGR_F_IsFieldNull().

Parameters

  iField | the field to test.

Returns
  TRUE if the field is null, otherwise false.

Since
  GDAL 2.2

int OGRFeature::IsFieldSet | ( | int | iField | ) | const

Test if a field has ever been assigned a value or not.

This method is the same as the C function OGR_F_IsFieldSet().

Parameters

  iField | the field to test.

Returns
  TRUE if the field has been set, otherwise false.

bool OGRFeature::IsFieldSetAndNotNull | ( | int | iField | ) | const

Test if a field is set and not null.

This method is the same as the C function OGR_F_IsFieldSetAndNotNull().

Parameters

  iField | the field to test.

Returns
  TRUE if the field is set and not null, otherwise false.

Since
  GDAL 2.2

const OGRFeature::FieldValue OGRFeature::operator[] | ( | int | iField | ) | const

Return a field value.

Parameters

  iField | the field to fetch, from 0 to GetFieldCount()-1. This is not checked by the method !

Returns
  the field value.

Since
  GDAL 2.3

OGRFeature::FieldValue OGRFeature::operator[] | ( | int | iField | ) |

Return a field value.

Parameters

  iField | the field to fetch, from 0 to GetFieldCount()-1. This is not checked by the method !

Returns
  the field value.

Since
  GDAL 2.3

const OGRFeature::FieldValue OGRFeature::operator[] | ( | const char * | pszFieldName | ) | const

Return a field value.

Parameters

  pszFieldName | field name

Returns
  the field value, or throw a FieldNotFoundException if not found.

Since
  GDAL 2.3

OGRFeature::FieldValue OGRFeature::operator[] | ( | const char * | pszFieldName | ) |

Return a field value.

Parameters

  pszFieldName | field name

Returns
  the field value, or throw a FieldNotFoundException if not found.

Since
  GDAL 2.3

OGRErr OGRFeature::SetFID | ( | GIntBig | nFIDIn | ) |
| virtual

Set the feature identifier.

For specific types of features this operation may fail on illegal features ids. Generally it always succeeds. Feature ids should be greater than or equal to zero, with the exception of OGRNullFID (-1) indicating that the feature id is unknown.

This method is the same as the C function OGR_F_SetFID().

Parameters

  nFIDIn | the new feature identifier value to assign.

Returns
  On success OGRERR_NONE, or on failure some other value.

void OGRFeature::SetField | ( | int | iField,
|  | int | nValue
| ) |  |

Set field to integer value.

OFTInteger, OFTInteger64 and OFTReal fields will be set directly. OFTString fields will be assigned a string representation of the value, but not necessarily taking into account formatting constraints on this field. Other field types may be unaffected.

This method is the same as the C function OGR_F_SetFieldInteger().

Note
  This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

  iField | the field to fetch, from 0 to GetFieldCount()-1.
  nValue | the value to assign.

void OGRFeature::SetField | ( | int | iField,
|  | GIntBig | nValue
| ) |  |

Set field to 64 bit integer value.

OFTInteger, OFTInteger64 and OFTReal fields will be set directly. OFTString fields will be assigned a string representation of the value, but not necessarily taking into account formatting constraints on this field. Other field types may be unaffected.

This method is the same as the C function OGR_F_SetFieldInteger64().

Note
  This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

  iField | the field to fetch, from 0 to GetFieldCount()-1.
  nValue | the value to assign.

Since
  GDAL 2.0

void OGRFeature::SetField | ( | int | iField,
|  | double | dfValue
| ) |  |

Set field to double value.

OFTInteger, OFTInteger64 and OFTReal fields will be set directly. OFTString fields will be assigned a string representation of the value, but not necessarily taking into account formatting constraints on this field. Other field types may be unaffected.

This method is the same as the C function OGR_F_SetFieldDouble().

Note
  This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

  iField | the field to fetch, from 0 to GetFieldCount()-1.
  dfValue | the value to assign.

void OGRFeature::SetField | ( | int | iField,
|  | const char * | pszValue
| ) |  |

Set field to string value.

OFTInteger fields will be set based on an atoi() conversion of the string. OFTInteger64 fields will be set based on an CPLAtoGIntBig() conversion of the string. OFTReal fields will be set based on an CPLAtof() conversion of the string. Other field types may be unaffected.

This method is the same as the C function OGR_F_SetFieldString().

Note
  This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

  iField | the field to fetch, from 0 to GetFieldCount()-1.
  pszValue | the value to assign.

void OGRFeature::SetField | ( | int | iField,
|  | int | nCount,
|  | const int * | panValues
| ) |  |

Set field to list of integers value.

This method currently on has an effect of OFTIntegerList, OFTInteger64List and OFTRealList fields.

This method is the same as the C function OGR_F_SetFieldIntegerList().

Note
  This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

  iField | the field to set, from 0 to GetFieldCount()-1.
  nCount | the number of values in the list being assigned.
  panValues | the values to assign.

void OGRFeature::SetField | ( | int | iField,
|  | int | nCount,
|  | const GIntBig * | panValues
| ) |  |

Set field to list of 64 bit integers value.

This method currently on has an effect of OFTIntegerList, OFTInteger64List and OFTRealList fields.

This method is the same as the C function OGR_F_SetFieldIntege64rList().

Note
  This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

  iField | the field to set, from 0 to GetFieldCount()-1.
  nCount | the number of values in the list being assigned.
  panValues | the values to assign.

Since
  GDAL 2.0

void OGRFeature::SetField | ( | int | iField,
|  | int | nCount,
|  | const double * | padfValues
| ) |  |

Set field to list of doubles value.

This method currently on has an effect of OFTIntegerList, OFTInteger64List, OFTRealList fields.

This method is the same as the C function OGR_F_SetFieldDoubleList().

Note
  This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

  iField | the field to set, from 0 to GetFieldCount()-1.
  nCount | the number of values in the list being assigned.
  padfValues | the values to assign.

void OGRFeature::SetField | ( | int | iField,
|  | const char *const * | papszValues
| ) |  |

Set field to list of strings value.

This method currently on has an effect of OFTStringList fields.

This method is the same as the C function OGR_F_SetFieldStringList().

Note
  This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

  iField | the field to set, from 0 to GetFieldCount()-1.
  papszValues | the values to assign. List of NUL-terminated string, ending with a NULL pointer.

void OGRFeature::SetField | ( | int | iField,
|  | OGRField * | puValue
| ) |  |

Set field.

The passed value OGRField must be of exactly the same type as the target field, or an application crash may occur. The passed value is copied, and will not be affected. It remains the responsibility of the caller.

This method is the same as the C function OGR_F_SetFieldRaw().

Note
  This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

  iField | the field to fetch, from 0 to GetFieldCount()-1.
  puValue | the value to assign.

void OGRFeature::SetField | ( | int | iField,
|  | int | nBytes,
|  | const void * | pabyData
| ) |  |

Set field to binary data.

This method currently on has an effect of OFTBinary fields.

This method is the same as the C function OGR_F_SetFieldBinary().

Note
  This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

  iField | the field to set, from 0 to GetFieldCount()-1.
  nBytes | bytes of data being set.
  pabyData | the raw data being applied.

void OGRFeature::SetField | ( | int | iField,
|  | int | nYear,
|  | int | nMonth,
|  | int | nDay,
|  | int | nHour = `0`,
|  | int | nMinute = `0`,
|  | float | fSecond = `0.f`,
|  | int | nTZFlag = `0`
| ) |  |

Set field to date.

This method currently only has an effect for OFTDate, OFTTime and OFTDateTime fields.

This method is the same as the C function OGR_F_SetFieldDateTime().

Note
  This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

  iField | the field to set, from 0 to GetFieldCount()-1.
  nYear | (including century)
  nMonth | (1-12)
  nDay | (1-31)
  nHour | (0-23)
  nMinute | (0-59)
  fSecond | (0-59, with millisecond accuracy)
  nTZFlag | (0=unknown, 1=localtime, 100=GMT, see data model for details)

OGRFeature::SetField | ( | const char * | pszFName,
|  | int | nValue
| ) |  |
| inline

Set field to integer value.

OFTInteger, OFTInteger64 and OFTReal fields will be set directly. OFTString fields will be assigned a string representation of the value, but not necessarily taking into account formatting constraints on this field. Other field types may be unaffected.

Note
  This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

  pszFName | the name of the field to set.
  nValue | the value to assign.

OGRFeature::SetField | ( | const char * | pszFName,
|  | GIntBig | nValue
| ) |  |
| inline

Set field to 64 bit integer value.

OFTInteger, OFTInteger64 and OFTReal fields will be set directly. OFTString fields will be assigned a string representation of the value, but not necessarily taking into account formatting constraints on this field. Other field types may be unaffected.

Note
  This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

  pszFName | the name of the field to set.
  nValue | the value to assign.

OGRFeature::SetField | ( | const char * | pszFName,
|  | double | dfValue
| ) |  |
| inline

Set field to double value.

OFTInteger, OFTInteger64 and OFTReal fields will be set directly. OFTString fields will be assigned a string representation of the value, but not necessarily taking into account formatting constraints on this field. Other field types may be unaffected.

Note
  This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

  pszFName | the name of the field to set.
  dfValue | the value to assign.

OGRFeature::SetField | ( | const char * | pszFName,
|  | const char * | pszValue
| ) |  |
| inline

Set field to string value.

OFTInteger fields will be set based on an atoi() conversion of the string. OFTInteger64 fields will be set based on an CPLAtoGIntBig() conversion of the string. OFTReal fields will be set based on an CPLAtof() conversion of the string. Other field types may be unaffected.

Note
  This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

  pszFName | the name of the field to set.
  pszValue | the value to assign.

OGRFeature::SetField | ( | const char * | pszFName,
|  | int | nCount,
|  | const int * | panValues
| ) |  |
| inline

Set field to list of integers value.

This method currently on has an effect of OFTIntegerList, OFTInteger64List and OFTRealList fields.

Note
  This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

  pszFName | the name of the field to set.
  nCount | the number of values in the list being assigned.
  panValues | the values to assign.

OGRFeature::SetField | ( | const char * | pszFName,
|  | int | nCount,
|  | const GIntBig * | panValues
| ) |  |
| inline

Set field to list of 64 bit integers value.

This method currently on has an effect of OFTIntegerList, OFTInteger64List and OFTRealList fields.

Note
  This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

  pszFName | the name of the field to set.
  nCount | the number of values in the list being assigned.
  panValues | the values to assign.

OGRFeature::SetField | ( | const char * | pszFName,
|  | int | nCount,
|  | const double * | padfValues
| ) |  |
| inline

Set field to list of doubles value.

This method currently on has an effect of OFTIntegerList, OFTInteger64List, OFTRealList fields.

Note
  This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

  pszFName | the name of the field to set.
  nCount | the number of values in the list being assigned.
  padfValues | the values to assign.

OGRFeature::SetField | ( | const char * | pszFName,
|  | const char *const * | papszValues
| ) |  |
| inline

Set field to list of strings value.

This method currently on has an effect of OFTStringList fields.

Note
  This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

  pszFName | the name of the field to set.
  papszValues | the values to assign. List of NUL-terminated string, ending with a NULL pointer.

OGRFeature::SetField | ( | const char * | pszFName,
|  | OGRField * | puValue
| ) |  |
| inline

Set field.

The passed value OGRField must be of exactly the same type as the target field, or an application crash may occur. The passed value is copied, and will not be affected. It remains the responsibility of the caller.

Note
  This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

  pszFName | the name of the field to set.
  puValue | the value to assign.

OGRFeature::SetField | ( | const char * | pszFName,
|  | int | nYear,
|  | int | nMonth,
|  | int | nDay,
|  | int | nHour = `0`,
|  | int | nMinute = `0`,
|  | float | fSecond = `0.f`,
|  | int | nTZFlag = `0`
| ) |  |
| inline

Set field to date.

This method currently only has an effect for OFTDate, OFTTime and OFTDateTime fields.

Note
  This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

  pszFName | the name of the field to set.
  nYear | (including century)
  nMonth | (1-12)
  nDay | (1-31)
  nHour | (0-23)
  nMinute | (0-59)
  fSecond | (0-59, with millisecond accuracy)
  nTZFlag | (0=unknown, 1=localtime, 100=GMT, see data model for details)

void OGRFeature::SetFieldNull | ( | int | iField | ) |

Clear a field, marking it as null.

This method is the same as the C function OGR_F_SetFieldNull().

Parameters

  iField | the field to set to null.

Since
  GDAL 2.2

OGRErr OGRFeature::SetFieldsFrom | ( | const OGRFeature * | poSrcFeature,
|  | const int * | panMap,
|  | int | bForgiving = `TRUE`
| ) |  |

Set fields from another feature.

Overwrite the fields of this feature from the attributes of another. The FID and the style string are not set. The poSrcFeature does not need to have the same OGRFeatureDefn. Field values are copied according to the provided indices map. Field types do not have to exactly match. SetField() method conversion rules will be applied as needed. This is more efficient than OGR_F_SetFrom() in that this doesn't lookup the fields by their names. Particularly useful when the field names don't match.

Parameters

  poSrcFeature | the feature from which geometry, and field values will be copied.
  panMap | Array of the indices of the feature's fields stored at the corresponding index of the source feature's fields. A value of -1 should be used to ignore the source's field. The array should not be NULL and be as long as the number of fields in the source feature.
  bForgiving | TRUE if the operation should continue despite lacking output fields matching some of the source fields.

Returns
  OGRERR_NONE if the operation succeeds, even if some values are not transferred, otherwise an error code.

OGRErr OGRFeature::SetFrom | ( | const OGRFeature * | poSrcFeature,
|  | int | bForgiving = `TRUE`
| ) |  |

Set one feature from another.

Overwrite the contents of this feature from the geometry and attributes of another. The poSrcFeature does not need to have the same OGRFeatureDefn. Field values are copied by corresponding field names. Field types do not have to exactly match. SetField() method conversion rules will be applied as needed.

This method is the same as the C function OGR_F_SetFrom().

Parameters

  poSrcFeature | the feature from which geometry, and field values will be copied.
  bForgiving | TRUE if the operation should continue despite lacking output fields matching some of the source fields.

Returns
  OGRERR_NONE if the operation succeeds, even if some values are not transferred, otherwise an error code.

OGRErr OGRFeature::SetFrom | ( | const OGRFeature * | poSrcFeature,
|  | const int * | panMap,
|  | int | bForgiving = `TRUE`
| ) |  |

Set one feature from another.

Overwrite the contents of this feature from the geometry and attributes of another. The poSrcFeature does not need to have the same OGRFeatureDefn. Field values are copied according to the provided indices map. Field types do not have to exactly match. SetField() method conversion rules will be applied as needed. This is more efficient than OGR_F_SetFrom() in that this doesn't lookup the fields by their names. Particularly useful when the field names don't match.

This method is the same as the C function OGR_F_SetFromWithMap().

Parameters

  poSrcFeature | the feature from which geometry, and field values will be copied.
  panMap | Array of the indices of the feature's fields stored at the corresponding index of the source feature's fields. A value of -1 should be used to ignore the source's field. The array should not be NULL and be as long as the number of fields in the source feature.
  bForgiving | TRUE if the operation should continue despite lacking output fields matching some of the source fields.

Returns
  OGRERR_NONE if the operation succeeds, even if some values are not transferred, otherwise an error code.

OGRErr OGRFeature::SetGeometry | ( | const OGRGeometry * | poGeomIn | ) |

Set feature geometry.

This method updates the features geometry, and operate exactly as SetGeometryDirectly(), except that this method does not assume ownership of the passed geometry, but instead makes a copy of it.

This method is the same as the C function OGR_F_SetGeometry().

Note
  This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

  poGeomIn | new geometry to apply to feature. Passing NULL value here is correct and it will result in deallocation of currently assigned geometry without assigning new one.

Returns
  OGRERR_NONE if successful, or OGR_UNSUPPORTED_GEOMETRY_TYPE if the geometry type is illegal for the OGRFeatureDefn (checking not yet implemented).

OGRErr OGRFeature::SetGeometryDirectly | ( | OGRGeometry * | poGeomIn | ) |

Set feature geometry.

This method updates the features geometry, and operate exactly as SetGeometry(), except that this method assumes ownership of the passed geometry (even in case of failure of that function).

This method is the same as the C function OGR_F_SetGeometryDirectly().

Note
  This method has only an effect on the in-memory feature object. If this object comes from a layer and the modifications must be serialized back to the datasource, OGR_L_SetFeature() must be used afterwards. Or if this is a new feature, OGR_L_CreateFeature() must be used afterwards.

Parameters

  poGeomIn | new geometry to apply to feature. Passing NULL value here is correct and it will result in deallocation of currently assigned geometry without assigning new one.

Returns
  OGRERR_NONE if successful, or OGR_UNSUPPORTED_GEOMETRY_TYPE if the geometry type is illegal for the OGRFeatureDefn (checking not yet implemented).

OGRErr OGRFeature::SetGeomField | ( | int | iField,
|  | const OGRGeometry * | poGeomIn
| ) |  |

Set feature geometry of a specified geometry field.

This method updates the features geometry, and operate exactly as SetGeomFieldDirectly(), except that this method does not assume ownership of the passed geometry, but instead makes a copy of it.

This method is the same as the C function OGR_F_SetGeomField().

Parameters

  iField | geometry field to set.
  poGeomIn | new geometry to apply to feature. Passing NULL value here is correct and it will result in deallocation of currently assigned geometry without assigning new one.

Returns
  OGRERR_NONE if successful, or OGRERR_FAILURE if the index is invalid, or OGR_UNSUPPORTED_GEOMETRY_TYPE if the geometry type is illegal for the OGRFeatureDefn (checking not yet implemented).

Since
  GDAL 1.11

OGRErr OGRFeature::SetGeomFieldDirectly | ( | int | iField,
|  | OGRGeometry * | poGeomIn
| ) |  |

Set feature geometry of a specified geometry field.

This method updates the features geometry, and operate exactly as SetGeomField(), except that this method assumes ownership of the passed geometry (even in case of failure of that function).

This method is the same as the C function OGR_F_SetGeomFieldDirectly().

Parameters

  iField | geometry field to set.
  poGeomIn | new geometry to apply to feature. Passing NULL value here is correct and it will result in deallocation of currently assigned geometry without assigning new one.

Returns
  OGRERR_NONE if successful, or OGRERR_FAILURE if the index is invalid, or OGRERR_UNSUPPORTED_GEOMETRY_TYPE if the geometry type is illegal for the OGRFeatureDefn (checking not yet implemented).

Since
  GDAL 1.11

void OGRFeature::SetNativeData | ( | const char * | pszNativeData | ) |

Sets the native data for the feature.

The native data is the representation in a "natural" form that comes from the driver that created this feature, or that is aimed at an output driver. The native data may be in different format, which is indicated by GetNativeMediaType().

This function is the same as the C function OGR_F_SetNativeData().

Parameters

  pszNativeData | a string with the native data, or NULL if there is none.

Since
  GDAL 2.1

See also
  https://trac.osgeo.org/gdal/wiki/rfc60_improved_roundtripping_in_ogr

void OGRFeature::SetNativeMediaType | ( | const char * | pszNativeMediaType | ) |

Sets the native media type for the feature.

The native media type is the identifier for the format of the native data. It follows the IANA RFC 2045 (see https://en.wikipedia.org/wiki/Media_type), e.g. "application/vnd.geo+json" for JSon.

This function is the same as the C function OGR_F_SetNativeMediaType().

Parameters

  pszNativeMediaType | a string with the native media type, or NULL if there is none.

Since
  GDAL 2.1

See also
  https://trac.osgeo.org/gdal/wiki/rfc60_improved_roundtripping_in_ogr

void OGRFeature::SetStyleString | ( | const char * | pszString | ) |
| virtual

Set feature style string.

This method operate exactly as OGRFeature::SetStyleStringDirectly() except that it does not assume ownership of the passed string, but instead makes a copy of it.

This method is the same as the C function OGR_F_SetStyleString().

Parameters

  pszString | the style string to apply to this feature, cannot be NULL.

void OGRFeature::SetStyleStringDirectly | ( | char * | pszString | ) |
| virtual

Set feature style string.

This method operate exactly as OGRFeature::SetStyleString() except that it assumes ownership of the passed string.

This method is the same as the C function OGR_F_SetStyleStringDirectly().

Parameters

  pszString | the style string to apply to this feature, cannot be NULL.

void OGRFeature::SetStyleTable | ( | OGRStyleTable * | poStyleTable | ) |
| virtual

Set style table.

Parameters

  poStyleTable | new style table (will be cloned)

void OGRFeature::SetStyleTableDirectly | ( | OGRStyleTable * | poStyleTable | ) |
| virtual

Set style table.

Parameters

  poStyleTable | new style table (ownership transferred to the object)

OGRGeometry * OGRFeature::StealGeometry | ( |  | ) |

Take away ownership of geometry.

Fetch the geometry from this feature, and clear the reference to the geometry on the feature. This is a mechanism for the application to take over ownership of the geometry from the feature without copying. Sort of an inverse to SetGeometryDirectly().

After this call the OGRFeature will have a NULL geometry.

Returns
  the pointer to the geometry.

OGRGeometry * OGRFeature::StealGeometry | ( | int | iGeomField | ) |

Take away ownership of geometry.

Fetch the geometry from this feature, and clear the reference to the geometry on the feature. This is a mechanism for the application to take over ownership of the geometry from the feature without copying. Sort of an inverse to SetGeometryDirectly().

After this call the OGRFeature will have a NULL geometry.

Parameters

  iGeomField | index of the geometry field.

Returns
  the pointer to the geometry.

static OGRFeatureH OGRFeature::ToHandle | ( | OGRFeature * | poFeature | ) |
| inline static

Convert a OGRFeature* to a OGRFeatureH.

Since
  GDAL 2.3

void OGRFeature::UnsetField | ( | int | iField | ) |

Clear a field, marking it as unset.

This method is the same as the C function OGR_F_UnsetField().

Parameters

  iField | the field to unset.

int OGRFeature::Validate | ( | int | nValidateFlags,
|  | int | bEmitError
| ) |  | const

Validate that a feature meets constraints of its schema.

The scope of test is specified with the nValidateFlags parameter.

Regarding OGR_F_VAL_WIDTH, the test is done assuming the string width must be interpreted as the number of UTF-8 characters. Some drivers might interpret the width as the number of bytes instead. So this test is rather conservative (if it fails, then it will fail for all interpretations).

This method is the same as the C function OGR_F_Validate().

Parameters

  nValidateFlags | OGR_F_VAL_ALL or combination of OGR_F_VAL_NULL, OGR_F_VAL_GEOM_TYPE, OGR_F_VAL_WIDTH and OGR_F_VAL_ALLOW_NULL_WHEN_DEFAULT, OGR_F_VAL_ALLOW_DIFFERENT_GEOM_DIM with '|' operator
  bEmitError | TRUE if a CPLError() must be emitted when a check fails

Returns
  TRUE if all enabled validation tests pass.

Since
  GDAL 2.0

The documentation for this class was generated from the following files:

- ogr_feature.h
- ogrfeature.cpp