Based on the characteristics of the groundwater table raster model

this paper firstly builds up the mathematical models about the groundwater flow direction

the cone of the depression and groundwater divides according to their hydrogeological definition. And then

seed algorithm and mathematical morphology are used to extract these spatial characteristics

and also the extracted information is visualized. In the end

this paper takes Su-Xi-Chang area as a study site

analyzes the extracted and visualized spatial characteristics

and gives some suggestion on the rational groundwater exploiting. These automated extraction results could facilitate the analysis of temporal and spatial dynamics of groundwater

provides support for groundwater management

and it also could be the useful exploring for digital groundwater study.