How to Extract Landslide Slope and Grid Unit Using QGIS only
LaGriSU: QGIS Tools of Grid Units and Geo-Morphological Slope Units Extraction for Landslides events Inventory
What you will learn
Automatically Generate training and testing data using Grid or Slope units for entire study area with DEM (Digital elevation model ) only
Easily able to create your own modeler tool in QGIS environment
Automatically generate free-landslide areas for Grid units and slope units
Automatically generate training data using Grid unit and slope units
Understand and apply the different mapping units in susceptibility mapping
Learn how to easily choose the wright and appropriate pixel dimension for your map
Hydrological analysis to produce slope units out of streams network intersections
Why take this course?
Welcome to my recent developed tools, that will help you to learn how to build apply sophisticated steeps using easy built in tools.
Along this course, I (Omar F. Althuwaynee, PhD in GIS and Geomatics engineering) will help you to:
To introduce into powerful function of processing tool boxes of QGIS
Install free processing tools inside QGIS
To understand the procedure of extraction of Grid units (GU) and morphological Slope units (SU)
To produce training and testing data AUTOMATICALLY, to be used later as input for data mining models like logistic regression or ANN and more. in easy steps
To easily run procedure with Less than 5 steps for each type of mapping techniques (GU and SU).
"QGIS as open source has very simple interface and FREE of charge available, therefore it is the great and powerful tool especially in third world based universities and not funded students."
At the the end of this course, you will be easily and efficiently able to use automatic process to build training and testing data for preparing landslide susceptibility mapping, using modeler of QGIS open source FREE software analysis capability.
***** February 2022 UPDATE !! *******
We have updated the "Model tools" named LaGriSU (Landslide-Grid-and-Slope-Units-QGIS_ToolPack), the current version :
Better performance and less time in processing
it works on QGIS versions 3.10, 3.12, 3.14 (64 bit & 32 bit) tested on both Windows and Linux
More robust hypothesis regarding to define landslide-free area (zones): I added 2 techniques | 1) Buffer zones, and 2) Slope value threshold
Both inventory of point and polygon features can be used
Comprehensive plots: Box plot to show the summary of different values statistics within landslides locations
Comprehensive summary reports: Summary of values statistics within landslides locations
***** March 2023 UPDATE !! ******* on GitHub
Stability issues when using large areas
Errors in geometries and dissolve
Slope units: binary sampling (1,0) count of training and testing is more closer in term of 1:1 ratio
Slope units: small polygons (pixel shapes) were removed
Using Github link
(search for /Althuwaynee/LaGriSU_Landslide-Grid-and-Slope-Units-QGIS_ToolPack)
Keywords: QGIS, GIS, automatic, tools, modeler, mapping, susceptibility
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