QGIS add Grass Create Watershed

3 step 

1. Import Raster

r.in.gdal -o input=G:/giswork/7thrmo/1850_b5km.tif output=1850

2. Create Watershed

r.watershed elevation=1850@wgs84 threshold=125 accumulation=9 drainage=10 stream=11 basin=12

3.raster to vector

r.to.vect input=12@wgs84 output=v1850 feature=area -s

 

Department of Civil Engineering 
National Taipei University of Technology

Jhih-Cyuan Shen

臺北科技大學土木工程系
沈志全