GDAL

### - u -

- UnaryUnion() : OGRGeometry
- Union() : GNMGenericLayer, OGRGeometry, OGRLayer
- UnionCascaded() : OGRGeometry
- UnlockBuffer() : GDALAsyncReader
- UnMarkSuppressOnClose() : GDALDataset
- Unseal() : OGRFeatureDefn, OGRFieldDefn, OGRGeomFieldDefn
- Unset() : OGRFeature::FieldValue
- UnsetField() : OGRFeature
- Update() : GNMGenericLayer, OGRLayer
- update() : OGRWKBPointUpdater
- UpdateFeature() : OGRLayer
- UpdateFieldDomain() : GDALDataset
- UpdateRelationship() : GDALDataset
- UpsertFeature() : OGRLayer
- usage() : GDALArgumentParser