Two kinds of multi - resolution spatial data model are studied in this paper . one is the feature model and hoom model based on dlg data . the other is multi - resolution dem model based on terrain data using the algorithms of self - adaptive triangular regular networks and hierarchical triangular irregular networks 论文主要对两种类型的多分辨率空间数据模型理论和实现技术进行研究，第一类空间数据是数字线划图数据dlg ，第二类是数字高程模型数据dem 。
