TopoJSON driver

Driver short name

TopoJSON

Driver built-in by default

This driver is built-in by default

The driver can read the TopoJSON format. The driver does not support writing TopoJSON datasets.

Driver capabilities

Supports Georeferencing

This driver supports georeferencing

Supports VirtualIO

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

Datasource

The driver accepts three types of sources of data:

• Uniform Resource Locator (URL) - a Web address to perform HTTP request.

• Plain text file with TopoJSON data - identified from the file extension .json or .topojson

• Text passed directly and encoded in Topo JSON

The URL/filename/text might be prefixed with TopoJSON: to avoid any ambiguity with other drivers. Alternatively, starting with GDAL 3.10, specifying the -if TopoJSON option to command line utilities accepting it, or TopoJSON as the only value of the papszAllowedDrivers of GDALOpenEx(), also forces the driver to recognize the passed URL/filename/text.

Examples

Example 1: Reading a TopoJSON file with multiple layers

gdal vector info "https://cdn.jsdelivr.net/npm/us-atlas@3/counties-albers-10m.json"

Example 2: Writing a single layer from a TopoJSON file to GeoJSON file

gdal vector convert "https://cdn.jsdelivr.net/npm/us-atlas@3/counties-albers-10m.json" counties-albers-10m.geojson --layer counties

See Also

• GeoJSON driver

• TopoJSON Format Specification