珠江三角洲第四系软土层DTM初步研究

The mollisol layers digital terrain model of the Pearl River delta

从珠江三角洲第四系沉积环境入手 ,分析建立珠江三角洲第四系沉降体系 DTM模型的原型与约束条件。论述了利用 GIS建模的技术路线、珠江三角洲边界线的赋值及其引入的误差、地层的地理编码、DEM质量等问题。

There are two noncontinuous mollisol layers in the sediment system of Pearl River delta,and these mollisol layers are harmful to the superstructure and underpinning.In order to analyse the 3D distribution of them,we utilize the Geographic Information System(GIS)and build the space/attribute database.At last,the mollisol layer digital elevation models are exported.Following issues are discussed:1,the attribute of the border of Pearl River delta;2,geographic code of the mollisol layers;3,data errors and data quality.