we are in progress with upgrading ThinkGeo Desktop WPF from version v10 to v12.
In this process we are facing issue with correct placement of the of the CAD drawings during display.
Particularly, i have a DWG drawing with no projection file (it is temporarily removed for test purpose), where i specify SRID manually (3949 - France). In version 10, the CAD drawing was displayed over Paris (it is indeed Paris streets drawing). But in version 12, drawing is displayed in Sweden, no matter if i specify projection or not.
During upgrade we created custom projection converter, which does nothing, but feeds SRID into the base class:
var projectionConverter = new RepositionableProjectionConverter();
if (srid != -1)
//Converting from the projection the sourceMapLayer uses to the overall projection (Bing) we use.
projectionConverter.InternalProjection = new Projection(srid);
projectionConverter.ExternalProjection = new Projection(Projection.GetBingMapProjString());
Do we miss anything important for the Converter?
With kind regards,