Calculate Topographic Wetness Index and Create a Processing Tool in QGIS

In this video you’ll derive the Topographic Wetness Index (TWI) from a DTM using the PCRaster Tools plugin in QGIS. Next, you’ll see how we can write a Python script that does the same. Finally you’ll see how to develop a Processing Tool and share it with others through the QGIS Resource Sharing plugin. 0:00 Introduction and theory 1:06 Calculate slope fraction 1:52 Calculate flow direction (LDD) 2:07 Calculate flow accumulation 3:16 Calculate cell area 3:48 Calculate TWI with Raster Calculator 5:20 Calculate TWI with Python script 9:50 Install Resource Sharing plugin 11:08 Create QGIS Processing Script #QGIS #PCRaster #PyQGIS