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Supported GIS Formats

The following GIS (Geographic Information System) formats can be both loaded and saved:

Format	Extension	Description
GeoJSON	.geojson	JSON-based format for geographical features
KML	.kml	Keyhole Markup Language (Google Earth)
GPX	.gpx	GPS Exchange Format
TopoJSON	.topojson	GeoJSON extension with topology encoding
GML	.gml	Geography Markup Language (XML-based)
OSM	.osm	OpenStreetMap XML format

The following GIS formats can be loaded and converted to any of the formats above:

Format	Extension	Description
GeoJSON Text Sequence	.geojsons	Newline-delimited sequence of GeoJSON features
KMZ	.kmz	Zipped KML (Google Earth)

Properties

Format - Specifies the desired GIS file format. Available options are: GeoJson, Kml, Gpx, TopoJson, Gml, Osm.

Conversion Examples

GisConvertOptions supports conversion between GIS formats. The following examples demonstrate common conversions.

GeoJSON to KML

Convert a GeoJSON file to KML (Keyhole Markup Language) for Google Earth:

using GroupDocs.Conversion;
using GroupDocs.Conversion.Options.Convert;
using GroupDocs.Conversion.FileTypes;

string sourceFile = "geographic-data.geojson";
string outputFile = "geographic-data.kml";

using (var converter = new Converter(sourceFile))
{
    var options = new GisConvertOptions
    {
        Format = GisFileType.Kml
    };
    converter.Convert(outputFile, options);
}

GPX to GeoJSON

Convert a GPX (GPS Exchange Format) file to GeoJSON:

using GroupDocs.Conversion;
using GroupDocs.Conversion.Options.Convert;
using GroupDocs.Conversion.FileTypes;

string sourceFile = "tracking-route.gpx";
string outputFile = "tracking-route.geojson";

using (var converter = new Converter(sourceFile))
{
    var options = new GisConvertOptions
    {
        Format = GisFileType.GeoJson
    };
    converter.Convert(outputFile, options);
}

GeoJSON to TopoJSON

Convert a GeoJSON file to TopoJSON format for topology-preserving conversions:

using GroupDocs.Conversion;
using GroupDocs.Conversion.Options.Convert;
using GroupDocs.Conversion.FileTypes;

string sourceFile = "map-boundaries.geojson";
string outputFile = "map-boundaries.topojson";

using (var converter = new Converter(sourceFile))
{
    var options = new GisConvertOptions
    {
        Format = GisFileType.TopoJson
    };
    converter.Convert(outputFile, options);
}

KMZ to GeoJSON

Convert a KMZ (zipped KML) file exported from Google Earth to GeoJSON:

using GroupDocs.Conversion;
using GroupDocs.Conversion.Options.Convert;
using GroupDocs.Conversion.FileTypes;

string sourceFile = "placemarks.kmz";
string outputFile = "placemarks.geojson";

using (var converter = new Converter(sourceFile))
{
    var options = new GisConvertOptions
    {
        Format = GisFileType.GeoJson
    };
    converter.Convert(outputFile, options);
}

GeoJSON to GML

Convert a GeoJSON file to GML (Geography Markup Language):

using GroupDocs.Conversion;
using GroupDocs.Conversion.Options.Convert;
using GroupDocs.Conversion.FileTypes;

string sourceFile = "parcels.geojson";
string outputFile = "parcels.gml";

using (var converter = new Converter(sourceFile))
{
    var options = new GisConvertOptions
    {
        Format = GisFileType.Gml
    };
    converter.Convert(outputFile, options);
}

Format Support Notes

Every supported GIS source format — GeoJSON, GeoJSON Text Sequence, GML, GPX, KML, KMZ, OSM and TopoJSON — converts to every GIS target format: GeoJSON, GML, GPX, KML, OSM and TopoJSON.

GML and OSM are available as conversion targets starting with version 26.9. GIS conversion is available on .NET Framework 4.6.2 as well as on .NET 6 and later starting with version 26.9.

Note: To convert FROM GIS formats to PDF, images, or other document formats, use PdfConvertOptions, ImageConvertOptions, or other appropriate ConvertOptions classes.

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