public static IPolygon CreatePolygon(IGeometry template,
IEnumerable <Linestring> rings)
{
IPolygon poly = GeometryFactory.CreateEmptyPolygon(template);
IRing ringTemplate = GeometryFactory.CreateEmptyRing(template);
foreach (Linestring closedLinestring in rings)
{
Assert.True(closedLinestring.IsClosed, "Linestring is not closed.");
IRing ring = CreateRing(closedLinestring, ringTemplate);
((IGeometryCollection)poly).AddGeometry(ring);
}
((IGeometryCollection)poly).GeometriesChanged();
return(poly);
}
private static T CreateEmptyPolycurve <T>(Ordinates ordinates,
[CanBeNull] IGeometry template = null)
where T : IPolycurve
{
bool createPolygon = typeof(IPolygon).IsAssignableFrom(typeof(T));
if (template != null)
{
return(createPolygon
? (T)GeometryFactory.CreateEmptyPolygon(template)
: (T)GeometryFactory.CreateEmptyPolyline(template));
}
bool zAware = ordinates == Ordinates.Xyz || ordinates == Ordinates.Xyzm;
bool mAware = ordinates == Ordinates.Xym || ordinates == Ordinates.Xyzm;
return(createPolygon
? (T)GeometryFactory.CreatePolygon(null, zAware, mAware)
: (T)GeometryFactory.CreateEmptyPolyline(null, zAware, mAware));
}
public static IPolygon CreatePolygon(IGeometry template,
IRing ringTemplate,
RingGroup ringGroup)
{
IPolygon poly = GeometryFactory.CreateEmptyPolygon(template);
IRing mainRing = CreateRing(ringGroup.ExteriorRing, ringTemplate);
((IGeometryCollection)poly).AddGeometry(mainRing);
foreach (Linestring interiorRing in ringGroup.InteriorRings)
{
IRing inner = CreateRing(interiorRing, ringTemplate);
((IGeometryCollection)poly).AddGeometry(inner);
}
((IGeometryCollection)poly).GeometriesChanged();
return(poly);
}
