地理資訊

qgis.org
https://www.qgis.org/en/site/

https://youtu.be/sPbNZh6iZ0Y

hand script http://gislearning.tcgs.tc.edu.tw/nspo.zip 

國土利用調查
https://www.nlsc.gov.tw/LUI/Home/Content_Home.aspx

SAGA-System for Automated Geoscientific  Analyses
http://www.saga-gis.org/en/index.html

 https://sagatutorials.wordpress.com/supervised-segmentation-classification/

SAGA的範例 

https://sagatutorials.wordpress.com/clipping-grids-with-polygons/