public static void Test()
{
string s1 = "POLYGON((7.5999034 47.5506347,7.5997595 47.5507183,7.5998959 47.5508256,7.5999759 47.5508885,7.6001195 47.550805,7.5999034 47.5506347))";
string s2 = "POLYGON((7.6003356 47.5509754,7.6001195 47.550805,7.5999759 47.5508885,7.6000322 47.5509328,7.6001926 47.551059,7.6003356 47.5509754))";
s1 = "POLYGON((7.5999034 47.5506347,7.6001195 47.550805,7.5999759 47.5508885,7.5998959 47.5508256,7.5997595 47.5507183,7.5999034 47.5506347))";
s2 = "POLYGON((7.6003356 47.5509754,7.6001926 47.551059,7.6000322 47.5509328,7.5999759 47.5508885,7.6001195 47.550805,7.6003356 47.5509754))";
// NetTopologySuite.Geometries.Implementation.CoordinateArraySequenceFactory
// GeoAPI.Geometries.IGeometryFactory geoFactory = new NetTopologySuite.Geometries.GeometryFactory();
NetTopologySuite.IO.WKTReader wr = new NetTopologySuite.IO.WKTReader();
Wgs84Coordinates[] coords1 = PolygonParsingExtensions.PolygonStringToCoordinates(s1);
Wgs84Coordinates[] coords2 = PolygonParsingExtensions.PolygonStringToCoordinates(s2);
var lr = new NetTopologySuite.Geometries.LinearRing(coords1.ToNetTopologyCoordinates());
System.Console.WriteLine(lr.IsValid);
var x = new NetTopologySuite.Geometries.Polygon(new NetTopologySuite.Geometries.LinearRing(coords1.ToNetTopologyCoordinates()));
System.Console.WriteLine(x.IsValid);
NetTopologySuite.Geometries.GeometryFactory geomFactory = new NetTopologySuite.Geometries.GeometryFactory();
GeoAPI.Geometries.IPolygon poly1 = geomFactory.CreatePolygon(coords1.ToNetTopologyCoordinates());
GeoAPI.Geometries.IPolygon poly2 = geomFactory.CreatePolygon(coords2.ToNetTopologyCoordinates());
/*
* GeoAPI.Geometries.IPolygon poly1 = (GeoAPI.Geometries.IPolygon)wr.Read(s1);
* GeoAPI.Geometries.IPolygon poly2 = (GeoAPI.Geometries.IPolygon)wr.Read(s2);
*/
poly1.SRID = 4326;
poly2.SRID = 4326;
CalculateArea2(coords1);
CalculateArea2(coords2);
System.Console.WriteLine(poly1.Area);
System.Console.WriteLine(poly2.Area);
GeoAPI.Geometries.IPolygon poly3quick = (GeoAPI.Geometries.IPolygon)poly1.Union(poly2);
System.Console.WriteLine(poly3quick.IsValid);
// https://gis.stackexchange.com/questions/209797/how-to-get-geometry-points-using-geo-api
System.Console.Write(poly1.IsValid);
System.Console.Write(poly2.IsValid);
System.Collections.Generic.List <GeoAPI.Geometries.IGeometry> lsPolygons =
new System.Collections.Generic.List <GeoAPI.Geometries.IGeometry>();
lsPolygons.Add(poly1);
lsPolygons.Add(poly2);
GeoAPI.Geometries.IGeometry ig = NetTopologySuite.Operation.Union.CascadedPolygonUnion.Union(lsPolygons);
System.Console.WriteLine(ig.GetType().FullName);
GeoAPI.Geometries.IPolygon poly3 = (GeoAPI.Geometries.IPolygon)ig;
System.Console.WriteLine(poly3);
// POLYGON ((7.5997595 47.5507183, 7.5999034 47.5506347, 7.6001195 47.550805, 7.6003356 47.5509754
// , 7.6001926 47.551059, 7.6000322 47.5509328, 7.5999759 47.5508885
// , 7.5998959 47.5508256, 7.5997595 47.5507183))
System.Console.WriteLine(poly3.Shell.Coordinates);
/*
* // GeoAPI.Geometries.IPolygon poly3 = (GeoAPI.Geometries.IPolygon)ig;
* NetTopologySuite.Geometries.MultiPolygon poly3a = (NetTopologySuite.Geometries.MultiPolygon)ig;
* GeoAPI.Geometries.IGeometry ig2 = poly3a.ConvexHull();
* System.Console.WriteLine(ig2.GetType().FullName);
*/
// GeoAPI.Geometries.IPolygon poly4 = (GeoAPI.Geometries.IPolygon)ig2;
// System.Console.WriteLine(poly4);
System.Console.WriteLine("--- Press any key to continue --- ");
System.Console.ReadKey();
} // End Sub Test
public static void TestUnion()
{
string s1 = "POLYGON((8.3038582 47.0506309,8.3038611 47.050588,8.3038772 47.0504833,8.3041581 47.0505083,8.3041532 47.0506229,8.303965 47.0506089,8.3039616 47.0506342,8.3038582 47.0506309))";
string s2 = "POLYGON((8.3041532 47.0506229,8.3041581 47.0505083,8.3042898 47.0505392,8.3042879 47.050571,8.3042854 47.0506139,8.3041532 47.0506229))";
string s3 = "POLYGON((8.3042879 47.050571,8.30442 47.05058,8.3044327 47.0507439,8.3043001 47.0507637,8.3042885 47.0506777,8.3042854 47.0506139,8.3042879 47.050571))";
string s4 = "POLYGON((8.304174 47.050784,8.3041695 47.0507507,8.3041592 47.0506835,8.3041585 47.0506448,8.3042166 47.0506438,8.3042225 47.0506777,8.3042885 47.0506777,8.3043001 47.0507637,8.304174 47.050784))";
Wgs84Coordinates[] coords1 = PolygonParsingExtensions.PolygonStringToCoordinates(s1);
Wgs84Coordinates[] coords2 = PolygonParsingExtensions.PolygonStringToCoordinates(s2);
Wgs84Coordinates[] coords3 = PolygonParsingExtensions.PolygonStringToCoordinates(s3);
Wgs84Coordinates[] coords4 = PolygonParsingExtensions.PolygonStringToCoordinates(s4);
NetTopologySuite.Geometries.GeometryFactory geomFactory = new NetTopologySuite.Geometries.GeometryFactory();
GeoAPI.Geometries.IPolygon poly1 = geomFactory.CreatePolygon(coords1.ToNetTopologyCoordinates());
GeoAPI.Geometries.IPolygon poly2 = geomFactory.CreatePolygon(coords2.ToNetTopologyCoordinates());
GeoAPI.Geometries.IPolygon poly3 = geomFactory.CreatePolygon(coords3.ToNetTopologyCoordinates());
GeoAPI.Geometries.IPolygon poly4 = geomFactory.CreatePolygon(coords4.ToNetTopologyCoordinates());
System.Collections.Generic.List <GeoAPI.Geometries.IGeometry> lsPolygons =
new System.Collections.Generic.List <GeoAPI.Geometries.IGeometry>();
lsPolygons.Add(poly1);
lsPolygons.Add(poly2);
lsPolygons.Add(poly3);
lsPolygons.Add(poly4);
GeoAPI.Geometries.IGeometry ig = NetTopologySuite.Operation.Union.CascadedPolygonUnion.Union(lsPolygons);
System.Console.WriteLine(ig.GetType().FullName);
GeoAPI.Geometries.IPolygon unionPolygon = (GeoAPI.Geometries.IPolygon)ig;
System.Console.WriteLine(poly3);
System.Console.WriteLine(unionPolygon.Shell.Coordinates);
System.Collections.Generic.List <Wgs84Coordinates> coords = new System.Collections.Generic.List <Wgs84Coordinates>();
for (int i = 0; i < unionPolygon.Shell.Coordinates.Length; ++i)
{
coords.Add(new Wgs84Coordinates(unionPolygon.Shell.Coordinates[i].X, unionPolygon.Shell.Coordinates[i].Y));
}
coords = PolygonParsingExtensions.ToCounterClockWise(coords);
// Close polygon if unclosed
if (coords[0].Latitude != coords[coords.Count - 1].Latitude || coords[0].Longitude != coords[coords.Count - 1].Longitude)
{
coords.Add(coords[0]);
}
string insertString = @"
DECLARE @GB_UID AS uniqueidentifier;
DECLARE @SO_UID AS uniqueidentifier;
SET @GB_UID = NULLIF('abc', '');
SET @SO_UID = NULLIF('', '');
DELETE FROM T_ZO_Objekt_Wgs84Polygon WHERE ZO_OBJ_WGS84_GB_UID = @GB_UID;
/*
INSERT INTO T_ZO_Objekt_Wgs84Polygon
(
ZO_OBJ_WGS84_UID
,ZO_OBJ_WGS84_GB_UID
,ZO_OBJ_WGS84_SO_UID
,ZO_OBJ_WGS84_Sort
,ZO_OBJ_WGS84_GM_Lat
,ZO_OBJ_WGS84_GM_Lng
)
*/";
for (int i = 0; i < coords.Count; ++i)
{
if (i != 0)
{
insertString += " \r\n\r\n\r\nUNION ALL \r\n\r\n";
}
insertString += $@"
SELECT
NEWID() AS ZO_OBJ_WGS84_UID
,CAST(@GB_UID AS uniqueidentifier) AS ZO_OBJ_WGS84_GB_UID
,CAST(@SO_UID AS uniqueidentifier) AS ZO_OBJ_WGS84_SO_UID
,CAST({i.ToString(System.Globalization.CultureInfo.InvariantCulture)} AS integer) + 1 AS ZO_OBJ_WGS84_Sort
,{coords[i].Latitude.ToString(System.Globalization.CultureInfo.InvariantCulture)} AS ZO_OBJ_WGS84_GM_Lat -- decimal(23, 20)
,{coords[i].Longitude.ToString(System.Globalization.CultureInfo.InvariantCulture)} AS ZO_OBJ_WGS84_GM_Lng -- decimal(23, 20) ";
}
insertString += " \r\n; \r\n\r\n";
System.Console.WriteLine(insertString);
System.Console.WriteLine("--- Press any key to continue --- ");
System.Console.ReadKey();
}