/// <summary>
/// A static helper for determining the length (in meters) between specified pixel coordinates
/// </summary>
protected static double LengthInMeters(CoordinateSystem cs, ITransform txfm, Coordinate pixelCd1, Coordinate pixelCd2)
{
Coordinate worldCd1 = pixelCd1.Transformed(txfm);
Coordinate worldCd2 = pixelCd2.Transformed(txfm);
var ls = new LineString(cs, worldCd1, worldCd2);
var lengthType = cs.IsLocal ? LinearLineLengthType.Meter : LinearLineLengthType.Geodetic;
return(ls.LineLength(lengthType));
}