enum OdDgTerrainOptionsType { kUnknown = 0x00, kTriangles = 0x01, kTriangleVertices = 0x02, kLowPoints = 0x03, kHighPoints = 0x04, kFlowArrows = 0x05, kMinorContour = 0x06, kMajorContour = 0x07, kSourceVertex = 0x08, kSourceBreakLine = 0x09, kSourceHole = 0x0A, kSourceIsland = 0x0B, kSourceVoid = 0x0C, kSourceBoundary = 0x0D, kSourceContour = 0x0E };