QGISHydro Webinar 3: Spatial Analysis using Map Algebra
In this series of 7 free webinars during the Corona Crisis, Kurt Menke and Hans van der Kwast demonstrate the 7 chapters of the book QGIS for Hydrological Applications - Recipes for Catchment Hydrology and Water Management.
In this webinar we demonstrate how to perform spatial analysis with raster data in QGIS using map algebra.
Join us next Friday from 9 pm CEST / 7 pm UTC at http://loc8.cc/qgishydro
The book is available at http://locatepress.com/hyd
0:00 Start QGISHydro Webinar 3
9:39 Introduction to demo map algebra
12:27 Start demo map algebra
18:05 Calculate boolean layer with raster calculator
20:51 Using the proximity (raster distance) tool
27:40 Settings of the Processing Toolbox
28:30 Reclassify raster by table
35:22 Calculate depth to water table
40:18 Combine all criteria with AND
42:55 Convert pixels to point vector
45:27 The Point Sampling tool
49:40 Styling the points
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