/// <summary>
/// Converts from Mapsui Geometry type to NetTopologySuite Geometry type, then converts to GeoJSON.
/// Writes the point list to wkt format, the uses Geometry2GeoJSON to convert to geojson
/// </summary>
/// <param name="pointList"></param>
/// <returns>GeoJSON</returns>
public static string CoordinatesToGeoJSON(List <Mapsui.Geometries.Point> pointList)
{
var wkt = "";
if (pointList.Count == 1)
{
var point = pointList[0];
wkt = Mapsui.Geometries.WellKnownText.GeometryToWKT.Write(point);
}
else if (pointList[0] == pointList[pointList.Count - 1])
{
var polygon = new Mapsui.Geometries.Polygon();
foreach (var coord in pointList)
{
polygon.ExteriorRing.Vertices.Add(new Mapsui.Geometries.Point(coord.X, coord.Y));
}
wkt = Mapsui.Geometries.WellKnownText.GeometryToWKT.Write(polygon);
}
else
{
var line = new Mapsui.Geometries.LineString(pointList);
wkt = Mapsui.Geometries.WellKnownText.GeometryToWKT.Write(line);
}
WKTReader reader = new WKTReader();
NetTopologySuite.Geometries.Geometry geom = reader.Read(wkt);
var geojson = DataDAO.Geometry2GeoJSON(geom);
return(geojson);
}
public Mapsui.Geometries.Polygon ToPolygon()
{
var polygon = new Mapsui.Geometries.Polygon();
foreach (Location point in Points)
{
polygon.ExteriorRing.Vertices.Add(point.ToMapsuiPoint());
}
return(polygon);
}