We can use professional GIS platform and digital software to digitalize the raw data such as remote sensing images, scanned maps and analyze the feature information the user need, including land use, vegetation cover, terrain and physiognomy, elevation information and so on.

Fig 1.  Extraction of land use in Qisha town, Guangxi.

 

Fig 2. Digital scanned map and contour.

 

Fig 2.  Digital information extracting contour lines from map