Convert Geomtry to Json

Question

In arcpy you just do geometry.JSON to get the json string for it.

I could not find a simple way to do the same in ArcObjects.

Convert single geometry (not in feature class) into json (or GeoJson) string.

The GeometryEngine in Pro SDK have ExportToJson.

Anybody?

FredericWalter · Answer

Another way to do the work is to use JSONConverterGeometry:

IJSONConverterGeometry JSONConverterGeometry = new JSONConverterGeometryClass();
IJSONObject JSONGeometry = new JSONObjectClass();
JSONConverterGeometry.QueryJSONGeometry(geometry, true, JSONGeometry);
string strGeometry = JSONGeometry.ToJSONString(null);

Maybe a litlle bit simplier ...

ModyBuchbinder · Answer

Here is my final code. The doc's are real bad , no samples and every small change gives catastrophic error with no error message.

Have fun

private string geo2json(IFeature feature)
        {
            IJSONWriter jsonWriter = new JSONWriterClass();
            jsonWriter.WriteToString();
            IJSONSerializer jsonSerializer = new JSONSerializerGdb();
            IPropertySet props = new PropertySetClass();
            props.SetProperty("Format", "GeoJSON");
            jsonSerializer.InitSerializer(jsonWriter, props);
            ((IExternalSerializerGdb)jsonSerializer).WriteGeometry(null, feature.Shape);

var geoJson = Encoding.UTF8.GetString(jsonWriter.GetStringBuffer());

return geoJson;

}

GKmieliauskas · Answer

There is method for geometry serializing:

- IExternalSerializerGdb.WriteGeometry Method (ArcObjects .NET 10.8 SDK) (arcgis.com)