It is essential to the spatial raster data structure of GIS; in fact, all spatial analysis about raster data is based on the digital topology.

数字拓扑主要研究栅格空间中离散几何对象的拓扑性质，这些性质在GIS空间分析和栅格数据处理中非常重要。

youdao

Its capabilities include: data input, geographical analysis (raster, vector and site), manipulate multi-spectral images and map display.

其功能包括：数据输入、地理分析(栅格、矢量、点)、多光谱图像处理、地图显示。

youdao