private static Models.GeoJson.Polygon GeoJsonPolygonFromGeometry(SqlGeometry Geometry, int numDigitsMantissa)
{
Debug.Assert(Geometry.STGeometryType().ToString() == OpenGisGeometryType.Polygon.ToString());
var geoType = (string)Geometry.STGeometryType();
// return a MultiPolygon containing the coordinates of the polygons
var mpoly = new Models.GeoJson.Polygon()
{
coordinates = PolygonCoordinatesFromGeometry(Geometry, numDigitsMantissa)
};
return(mpoly);
}
/// <summary>
/// Build an SqlGeography Polygon from a GeoJson Polygon.
/// </summary>
/// <param name="poly">GeoJson Polygon</param>
/// <returns>SqlGeography Polygon</returns>
public static SqlGeography GeographyFromGeoJsonPolygon(Models.GeoJson.Polygon poly, int SRID)
{
var geob = new SqlGeographyBuilder();
geob.SetSrid(SRID);
geob.BeginGeography(OpenGisGeographyType.Polygon);
geob.BeginFigure(poly.coordinates[0][0][0], poly.coordinates[0][0][1]);
foreach (var pair in poly.coordinates[0].Skip(1))
{
geob.AddLine(pair[0], pair[1]);
}
geob.EndFigure();
geob.EndGeography();
var geog = geob.ConstructedGeography;
Debug.WriteLine(geog.AsGml().Value);
return(geog);
}
