0

我必须合并一组多边形来创建一个新的多边形。
有时会发生我在多边形之间有小洞，所以当我尝试合并它们时，我会收到一个错误。
我怎样才能检测到这个并解决？

更新一些错误示例

side location conflict [ (12.235768128349596, 44.387249570104892, NaN) ]
   at NetTopologySuite.Operation.Overlay.Snap.SnapIfNeededOverlayOp.GetResultGeometry(SpatialFunction opCode)
   at NetTopologySuite.Geometries.Geometry.Union(IGeometry other)
   at NetTopologySuite.Operation.Union.CascadedPolygonUnion.UnionOptimized(IGeometry g0, IGeometry g1)
   at NetTopologySuite.Operation.Union.CascadedPolygonUnion.Union()
   at NetTopologySuite.Operation.Union.UnaryUnionOp.Union()

或者

found non-noded intersection between LINESTRING(12.448591764796777 41.972860890341124, 12.448731325430401 41.972841479998927) and LINESTRING(12.449 41.973, 12.448695198462875 41.972831837041554) [ (12.448716431340822, 41.972843551495508, NaN) ]
   at NetTopologySuite.Noding.FastNodingValidator.CheckValid()
   at NetTopologySuite.Operation.Overlay.OverlayOp.ComputeOverlay(SpatialFunction opCode)
   at NetTopologySuite.Operation.Overlay.OverlayOp.Overlay(IGeometry geom0, IGeometry geom1, SpatialFunction opCode)

或者

Invalid number of points in LineString (found 1 - must be 0 or >= 2)
   at NetTopologySuite.Geometries.LineString..ctor(ICoordinateSequence points, IGeometryFactory factory)
   at NetTopologySuite.Geometries.GeometryFactory.CreatePolygon(ICoordinateSequence coordinates)
4

1 回答 1

0

您遇到的大多数错误都是由于无效的几何形状造成的。geometry.IsValid您可以使用或使用类来检查几何是否有效NetTopologySuite.Operation.Valid.IsValidOp。要纠正这些错误，您通常可以使用 0 偏移缓冲区：geometry = geometry.Buffer(0).

于 2018-11-21T16:41:48.727 回答