I have a set of points (drawn polygon) that have the SpatialReferences.WebMercator property. I need to convert these points to SpatialReferences.Wgs84 before saving to a database. Ideally I would just keep the WebMercator setting, but the existing database is using the Wgs84 format.
I am using the GeometryEngine class, but I noticed that once I reload the polygon, it is off by some way. It is in a different location. How can I make sure this conversion is accurate?
public double[] ConvertMercatorToWgs(double lat, double lon)
{
MapPoint point = new MapPoint(lon, lat, SpatialReferences.WebMercator);
//These lines did not influence the results
//GeographicTransformationStep geoStep = new GeographicTransformationStep(108211);
//GeographicTransformation geoTransform = new GeographicTransformation(geoStep);
MapPoint convertedPoint = (MapPoint)GeometryEngine.Project(point, SpatialReferences.Wgs84,);
return new double[] { convertedPoint.X, convertedPoint.Y };
}
