public void PolygonTests()
{
var polygon = new Polygon(new LinearRing(new[] { new Coordinate(0, 0), new Coordinate(5, 0), new Coordinate(0, 5) }));
Console.WriteLine(polygon.ToWktString());
AssertThatIndexPropertyIsGenerated(polygon);
AssertTrue(polygon, SpatialRelation.Within, new Circle(0, 0, 600000));
AssertFalse(polygon, SpatialRelation.Within, new Circle(0, 160, 600000));
AssertTrue(polygon, SpatialRelation.Intersects, new Circle(0, 0, 110000));
AssertFalse(polygon, SpatialRelation.Intersects, new Circle(0, 160, 110000));
}
public void PointOutsidePolygon()
{
var bermudaTriangle = new Polygon(
new Coordinate( 25.774, -80.190 ),
new Coordinate( 18.446, -66.118 ),
new Coordinate( 32.321, -64.757 ),
new Coordinate( 25.774, -80.190 )
);
var point = new Coordinate( 25.282622, -80.433723 );
Assert.IsFalse( bermudaTriangle.Contains( point ) );
}
public void PointInsidePolygon()
{
var bermudaTriangle = new Polygon(
new Coordinate( 25.774, -80.190 ),
new Coordinate( 18.446, -66.118 ),
new Coordinate( 32.321, -64.757 ),
new Coordinate( 25.774, -80.190 )
);
var point = new Coordinate( 25.123574, -76.149055 );
Assert.IsTrue( bermudaTriangle.Contains( point ) );
}
private bool TryParsePolygon(JsonObject obj, out object result)
{
var coordinates = obj["coordinates"] as JsonArray;
Coordinate[][] temp;
if (coordinates != null && coordinates.Count > 0 && TryParseCoordinateArrayArray(coordinates, out temp))
{
result = new Polygon(new LinearRing(temp[0]), temp.Skip(1).Select(x => new LinearRing(x)));
return true;
}
result = null;
return false;
}
private void AppendPolygonInner(StringBuilder builder, Polygon polygon)
{
if (polygon.IsEmpty)
{
builder.Append("EMPTY");
return;
}
builder.Append("(");
AppendLineStringInner(builder, polygon.Shell.Coordinates);
for (var i = 0; i < polygon.Holes.Count; i++)
{
builder.Append(", ");
AppendLineStringInner(builder, polygon.Holes[i].Coordinates);
}
builder.Append(")");
}
private void AppendPolygon(StringBuilder builder, Polygon polygon)
{
builder.Append("POLYGON");
AppendDimensions(builder, polygon);
builder.Append(" ");
AppendPolygonInner(builder, polygon);
}
private void WritePolygonInner(Polygon polygon, WkbBinaryWriter writer)
{
if (polygon.IsEmpty)
{
writer.Write(0u);
}
else
{
writer.Write((uint)(1 + polygon.Holes.Count));
WriteCoordinates(polygon.Shell.Coordinates, writer);
foreach (var hole in polygon.Holes)
WriteCoordinates(hole.Coordinates, writer);
}
}
private void WritePolygon(Polygon polygon, WkbBinaryWriter writer)
{
WriteEncoding(writer, _settings.Encoding);
WriteGeometryType(polygon, WkbGeometryType.Polygon, writer);
WritePolygonInner(polygon, writer);
}
private void WritePolygon(Polygon polygon, WkbBinaryWriter writer)
{
WriteGeometryType(polygon, WkbGeometryType.Polygon, writer);
WritePolygonInner(polygon, writer);
}
private IEnumerable<IEnumerable<double[]>> WriteCoordinates(Polygon polygon)
{
yield return WriteCoordinates(polygon.Shell.Coordinates);
foreach (var hole in polygon.Holes)
yield return WriteCoordinates(hole.Coordinates);
}
private Dictionary<string, object> WritePolygon(Polygon polygon)
{
return new Dictionary<string, object>
{
{ "type", "Polygon" },
{ "coordinates", WriteCoordinates(polygon) }
};
}
public void Polygon()
{
var reader = new GeoJsonReader();
var geo =
new Polygon(new LinearRing(new Coordinate(0, 0), new Coordinate(1, 1), new Coordinate(2, 0),
new Coordinate(0, 0)));
Assert.AreEqual(@"{""type"":""Polygon"",""coordinates"":[[[0,0],[1,1],[0,2],[0,0]]]}",
geo.ToGeoJson());
Assert.AreEqual(geo, reader.Read(geo.ToGeoJson()));
}
