New in version 3.1.

Driver short name


Driver built-in by default

This driver is built-in by default

This driver implements read/write support for access to features encoded in FlatGeobuf format, a performant binary encoding for geographic data based on flatbuffers that can hold a collection of Simple Features.

Driver capabilities

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.)

Multi layer support

A single .fgb file only contains one single layer. For multiple layer support, it is possible to put several .fgb files in a directory, and use that directory name as the connection string.

On creation, passing a filename without a .fgb suffix will instruct the driver to create a directory of that name, and create layers as .fgb files in that directory.

Open options

  • VERIFY_BUFFERS=YES/NO: Set to YES to verify buffers when reading. This can provide some protection for invalid/corrupt data with a performance trade off. Defaults to YES.

Dataset Creation Options


Layer Creation Options

  • SPATIAL_INDEX=[YES/NO]: Defaults to YES. Set to YES to create a spatial index.

  • TEMPORARY_DIR=<path>: Path to an existing directory where temporary files should be created. Only used if SPATIAL_INDEX=YES. If not specified, the directory of the output file will be used for regular filenames. For other VSI file systems, the temporary directory will be the one decided by the CPLGenerateTempFilename() function. "/vsimem/" can be used for in-memory temporary files.

Creation Issues

Currently, NULL geometries are not supported with SPATIAL_INDEX=YES.

More background and dicussion on this issue at


  • Simple translation of a single shapefile into a FlatGeobuf file. The file 'filename.fgb' will be created with the features from abc.shp and attributes from abc.dbf. The file filename.fgb must not already exist, as it will be created.

    ogr2ogr -f FlatGeobuf filename.fgb abc.shp
  • Conversion of a Geopackage file with multiple layers:

    ogr2ogr -f FlatGeobuf my_fgb_dataset input.gpkg

See Also