public static void main(string[] args)
{
// create a factory using default values (e.g. floating precision)
GeometryFactory fact = new GeometryFactory();
IPoint p1 = fact.CreatePoint(new Coordinate(0, 0));
Console.WriteLine(p1);
IPoint p2 = fact.CreatePoint(new Coordinate(1, 1));
Console.WriteLine(p1);
IMultiPoint mpt = fact.CreateMultiPoint(new ICoordinate[]{ new Coordinate(0, 0), new Coordinate(1, 1), });
Console.WriteLine(mpt);
}
public static IGeometry InsertCurvePoint(IGeometry geometry, ICoordinate coordinate, int index)
{
var vertices = new List<ICoordinate>(geometry.Coordinates);
vertices.Insert(index, coordinate);
var geometryFactory = new GeometryFactory();
if (geometry is ILineString)
{
return geometryFactory.CreateLineString(vertices.ToArray());
}
if (geometry is IPolygon)
{
return geometryFactory.CreatePolygon(geometryFactory.CreateLinearRing(vertices.ToArray()), null);
}
return geometry.Union(geometryFactory.CreatePoint(coordinate));
}
public static IGeometry RemoveCurvePoint(IGeometry geometry, int index, bool keepLineStringEndPoints=false)
{
var vertices = new List<ICoordinate>(geometry.Coordinates);
vertices.RemoveAt(index);
var geometryFactory = new GeometryFactory();
var lastIndex = geometry.Coordinates.Length - 1;
if (geometry is ILineString)
{
if (vertices.Count < 2)
{
return null;
}
if (keepLineStringEndPoints && (index == 0 || index == lastIndex))
{
return null;
}
return geometryFactory.CreateLineString(vertices.ToArray());
}
if (geometry is IPolygon)
{
// If first or last index is removed -> remove corresponding duplicate at the other end and close the ring.
if (index == lastIndex)
{
vertices[0] = vertices[lastIndex];
}
if (index == 0)
{
vertices[lastIndex - 1] = vertices[0];
}
if (vertices.Count < 4)
{
return null;
}
return geometryFactory.CreatePolygon(geometryFactory.CreateLinearRing(vertices.ToArray()), null);
}
if (index < geometry.Coordinates.Length)
{
var coordinate = geometry.Coordinates[index];
var point = geometryFactory.CreatePoint(coordinate);
return geometry.Difference(point);
}
return geometry;
}
internal static GisSharpBlog.NetTopologySuite.Geometries.Point ToNTSPoint(Point point,
GeometryFactory factory)
{
return
factory.CreatePoint(ToNTSCoordinate(point, factory)) as GisSharpBlog.NetTopologySuite.Geometries.Point;
}
