public void ParsePolygon()
{
string polygon = "POLYGON ((20 20, 20 30, 30 30, 30 20, 20 20))";
Polygon geom = Geometry.GeomFromText(polygon) as Polygon;
Assert.IsNotNull(geom);
Assert.AreEqual(40, geom.ExteriorRing.Length);
Assert.AreEqual(100, geom.Area);
Assert.AreEqual(polygon, geom.AsText());
//Test interior rings
polygon = "POLYGON ((20 20, 20 30, 30 30, 30 20, 20 20), (21 21, 29 21, 29 29, 21 29, 21 21), (23 23, 23 27, 27 27, 27 23, 23 23))";
geom = Geometry.GeomFromText(polygon) as Polygon;
Assert.IsNotNull(geom);
Assert.AreEqual(40, geom.ExteriorRing.Length);
Assert.AreEqual(2, geom.InteriorRings.Count);
Assert.AreEqual(52, geom.Area);
Assert.AreEqual(geom.ExteriorRing.Area - geom.InteriorRings[0].Area + geom.InteriorRings[1].Area, geom.Area);
Assert.AreEqual(polygon, geom.AsText());
//Test empty geometry WKT
Assert.IsTrue(Geometry.GeomFromText("POLYGON EMPTY").IsEmpty());
Assert.AreEqual("POLYGON EMPTY", new Polygon().AsText());
}
public void Buffer()
{
var geom =
new Polygon(
new LinearRing(new Coordinate[]
{
new Coordinate(0, 0), new Coordinate(0, 10), new Coordinate(10, 10),
new Coordinate(10, 0), new Coordinate(0, 0)
}));
Console.WriteLine(geom.AsText());
var geom2 = geom.Buffer(2d);
Console.WriteLine(geom2);
var geom3 = geom2.Buffer(-2);
geom3.Normalize();
Console.WriteLine(geom3);
}
public void Start()
{
var interiorPoint = Factory.CreatePoint(new Coordinate(130, 150));
var exteriorPoint = Factory.CreatePoint(new Coordinate(650, 1500));
var aLine = Factory.CreateLineString(new Coordinate[] { new Coordinate(23, 32.2), new Coordinate(10, 222) });
var anotherLine = Factory.CreateLineString(new Coordinate[] { new Coordinate(0, 1), new Coordinate(30, 30) });
var intersectLine = Factory.CreateLineString(new Coordinate[] { new Coordinate(0, 1), new Coordinate(300, 300) });
try
{
Write(polygon.Area);
Write(polygon.Boundary);
Write(polygon.BoundaryDimension);
Write(polygon.Centroid);
Write(polygon.Coordinate);
Write(polygon.Coordinates.Length);
Write(polygon.Dimension);
Write(polygon.Envelope);
Write(polygon.EnvelopeInternal);
Write(polygon.ExteriorRing);
Write(polygon.InteriorPoint);
Write(polygon.InteriorRings.Length);
Write(polygon.IsEmpty);
Write(polygon.IsSimple);
Write(polygon.IsValid);
Write(polygon.Length);
Write(polygon.NumInteriorRings);
Write(polygon.NumPoints);
if (polygon.UserData != null)
{
Write(polygon.UserData);
}
else
{
Write("UserData null");
}
Write(polygon.Buffer(10));
Write(polygon.Buffer(10, new BufferParameters {
EndCapStyle = EndCapStyle.Flat
}));
Write(polygon.Buffer(10, new BufferParameters {
EndCapStyle = EndCapStyle.Square
}));
Write(polygon.Buffer(10, 20));
Write(polygon.Buffer(10, new BufferParameters(20)
{
EndCapStyle = EndCapStyle.Flat
}));
Write(polygon.Buffer(10, new BufferParameters(20)
{
EndCapStyle = EndCapStyle.Square
}));
Write(polygon.Contains(interiorPoint));
Write(polygon.Contains(exteriorPoint));
Write(polygon.Contains(aLine));
Write(polygon.Contains(anotherLine));
Write(polygon.Crosses(interiorPoint));
Write(polygon.Crosses(exteriorPoint));
Write(polygon.Crosses(aLine));
Write(polygon.Crosses(anotherLine));
Write(polygon.Difference(interiorPoint));
Write(polygon.Difference(exteriorPoint));
Write(polygon.Difference(aLine));
Write(polygon.Difference(anotherLine));
Write(polygon.Disjoint(interiorPoint));
Write(polygon.Disjoint(exteriorPoint));
Write(polygon.Disjoint(aLine));
Write(polygon.Disjoint(anotherLine));
Write(polygon.Distance(interiorPoint));
Write(polygon.Distance(exteriorPoint));
Write(polygon.Distance(aLine));
Write(polygon.Distance(anotherLine));
Write(polygon.Intersection(interiorPoint));
Write(polygon.Intersection(exteriorPoint));
Write(polygon.Intersection(aLine));
Write(polygon.Intersection(anotherLine));
Write(polygon.Intersects(interiorPoint));
Write(polygon.Intersects(exteriorPoint));
Write(polygon.Intersects(aLine));
Write(polygon.Intersects(anotherLine));
Write(polygon.IsWithinDistance(interiorPoint, 300));
Write(polygon.IsWithinDistance(exteriorPoint, 300));
Write(polygon.IsWithinDistance(aLine, 300));
Write(polygon.IsWithinDistance(anotherLine, 300));
Write(polygon.Overlaps(interiorPoint));
Write(polygon.Overlaps(exteriorPoint));
Write(polygon.Overlaps(aLine));
Write(polygon.Overlaps(anotherLine));
Write(polygon.Relate(interiorPoint));
Write(polygon.Relate(exteriorPoint));
Write(polygon.Relate(aLine));
Write(polygon.Relate(anotherLine));
Write(polygon.SymmetricDifference(interiorPoint));
Write(polygon.SymmetricDifference(exteriorPoint));
Write(polygon.SymmetricDifference(aLine));
Write(polygon.SymmetricDifference(anotherLine));
Write(polygon.ToString());
Write(polygon.AsText());
Write(polygon.Touches(interiorPoint));
Write(polygon.Touches(exteriorPoint));
Write(polygon.Touches(aLine));
Write(polygon.Touches(anotherLine));
Write(polygon.Union(interiorPoint));
Write(polygon.Union(exteriorPoint));
Write(polygon.Union(aLine));
Write(polygon.Union(anotherLine));
string aPoly = "POLYGON ((20 20, 100 20, 100 100, 20 100, 20 20))";
string anotherPoly = "POLYGON ((20 20, 100 20, 100 100, 20 100, 20 20), (50 50, 60 50, 60 60, 50 60, 50 50))";
var geom1 = Reader.Read(aPoly);
Write(geom1.AsText());
var geom2 = Reader.Read(anotherPoly);
Write(geom2.AsText());
// ExpandToInclude tests
var envelope = new Envelope(0, 0, 0, 0);
envelope.ExpandToInclude(geom1.EnvelopeInternal);
envelope.ExpandToInclude(geom2.EnvelopeInternal);
Write(envelope.ToString());
// The polygon is not correctly ordered! Calling normalize we fix the problem...
polygon.Normalize();
byte[] bytes = polygon.AsBinary();
var test1 = new WKBReader().Read(bytes);
Write(test1.ToString());
bytes = new GDBWriter().Write(polygon);
test1 = new GDBReader().Read(bytes);
Write(test1.ToString());
}
catch (Exception ex)
{
throw ex;
}
}
