In Well-Known Text (WKT) format, a TRIANGLEFAN consists of the TRIANGLEFAN keyword followed by the coordinate list.
TRIANGLEFAN(0 0 1 1,0 10 2 2,10 10 3 3,10 0 4 4)Dimension variants
TRIANGLEFAN supports Z, M, and ZM dimensions.
Z dimension — adds elevation (z), three values per vertex:
TRIANGLEFAN Z(0 0 1,0 10 2,10 10 3,10 0 4)M dimension — adds a measured value (m), three values per vertex:
TRIANGLEFAN M(0 0 1,0 10 2,10 10 3,10 0 4)ZM dimension — adds both elevation and a measured value, four values per vertex in x y z m order:
TRIANGLEFAN ZM(0 0 1 1,0 10 2 2,10 10 3 3,10 0 4 4)该文章对您有帮助吗？