After transformation of the data model and processing of the thematicmapping elements, the paper constructs a mapping system of the seabed sediment thematic.
经过对数据模型的转换以及专题制图要素的处理，建立了海洋底质专题数字图成图系统。
2
But in the aspects of Thematicmapping automation, mapping system based on GIS still has many limitations, Particularly the Thematic map type and sign automation need manual disposal to be realized.