How can I convert coordinates to WKT format like 39.8251136,-8.3824103 with 900913 system (spherical Mercator)?

My client is askying me something like this: SRID=900913;POINT(-939520.0088637 4744291.7338414) but I already search about this and I don't find anything.

I found this link: https://stackoverflow.com/questions/3561186/converting-lat-long-to-pointclass but I don't know where I can find the DLL with the SpatialReferenceEnvironmentClass class for I can test that code...

  • That's not WKT, but EWKT, which is PostGIS-specific. – Vince Aug 24 '17 at 18:08
  • It looks like you want to project then serialize the coordinate. I'm not a C# programmer, but it looks like there are several libraries available to do the job that don't require ESRI libraries. For example, DotSpatial. Tutorials here. – Rob Skelly Aug 24 '17 at 18:47

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