///// <summary>
///// Converts a list of DataPolygons to a GeoJSON FeatureCollection.
///// </summary>
///// <param name="dataPolygons">The DataPolygons.</param>
///// <returns></returns>
//public static FeatureCollection ConvertToGeoJSONFeatureCollection(List<DataPolygon> dataPolygons, IUserContext userContext, CoordinateSystem fromCoordinateSystem, CoordinateSystem toCoordinateSystem)
//{
// var featureCollection = new FeatureCollection(new List<Feature>());
// DataContext dataContext = new DataContext(userContext);
// foreach (DataPolygon dataPolygon in dataPolygons)
// {
// var pol = dataPolygon.ToPolygon(dataContext);
// pol = GisTools.CoordinateConversionManager.GetConvertedPolygon(pol, fromCoordinateSystem, toCoordinateSystem);
// Polygon polygon = ConvertToGeoJSONPolygon(dataPolygon);
// var feature = new Feature(polygon);
// featureCollection.Features.Add(feature);
// }
// return featureCollection;
//}
/// <summary>
/// Converts a DataPolygon to a GeoJSON polygon.
/// </summary>
/// <param name="dataPolygon">The DataPolygon to convert.</param>
/// <returns></returns>
public static Polygon ConvertToGeoJSONPolygon(DataPolygon dataPolygon)
{
var polygon = new Polygon(new List <LineString>());
if (dataPolygon.IsNull() || dataPolygon.LinearRings.IsEmpty())
{
return(polygon);
}
foreach (DataLinearRing dataLinearRing in dataPolygon.LinearRings)
{
var coordinates = new List <GeographicPosition>();
foreach (DataPoint dataPoint in dataLinearRing.Points)
{
var position = new GeographicPosition(dataPoint.X, dataPoint.Y, dataPoint.Z);
coordinates.Add(position);
}
var lineString = new LineString(coordinates);
polygon.Coordinates.Add(lineString);
}
return(polygon);
}
