As the rapidly development of the research of 3DGIS in the recently years,especially in the field of 3-dimension city model(DCM), Many researchers inChina and abroad improved some models that are very useful.

• 3DGIS的研究近年来得到了飞速的发展，尤其是三维城市模型（3DCM）的研究更是火热，许多国内外学者在3DGIS数据模型研究方面提出了很有价值的模型。