# ADRG – ADRG/ARC Digitized Raster Graphics (.gen/.thf)

Driver short name

ADRG

Driver built-in by default

This driver is built-in by default

Supported by GDAL for read access. Creation is possible, but it must be considered as experimental and a means of testing read access (although files created by the driver can be read successfully on another GIS software)

An ADRG dataset is made of several files. The file recognised by GDAL is the General Information File (.GEN). GDAL will also need the image file (.IMG), where the actual data is.

The Transmission Header File (.THF) can also be used as an input to GDAL. If the THF references more than one image, GDAL will report the images it is composed of as subdatasets. If the THF references just one image, GDAL will open it directly.

Overviews, legends and insets are not used. Polar zones (ARC zone 9 and 18) are not supported (due to the lack of test data).

See also : the ADRG specification (MIL-A-89007)

## Driver capabilities

Supports CreateCopy()

This driver supports the `GDALDriver::CreateCopy()` operation

Supports Create()

This driver supports the `GDALDriver::Create()` operation

Supports Georeferencing

This driver supports georeferencing

Supports VirtualIO

This driver supports virtual I/O operations (/vsimem/, etc.)