Terrain Analysis: This section will introduce basic concepts in terrain analysis and how to prepare elevation data for hydrological analysis. SAGA-GIS Module Library Documentation (v2.1.3) Modules A-Z Contents Terrain Analysis - Preprocessing Module Fill Sinks (Wang & Liu) This module uses an algorithm proposed by Wang & Liu to identify and fill surface depressions in digital elevation models. We then look at methods for: This section works with example data from West Timor Indonesia. Object Based Classification – video tutorials. SAGA offers wide range of applications for terrain analysis. This creates a grid of aspect or facing direction. SAGA - System for Automated Geoscientific Analyses. continue without frames. Produces a grid showing water accumulation. View /groups/208599582556485/’s profile on Facebook, View UCVb8IooiF3-yzmxEBFs7OTA’s profile on YouTube. One of the attributes of this data is the Strahler order which is a measure of order of the stream in the drainage network. Download here: West Timor – elevation Data. SAGA enables the creation of multiple terrain layers which can be used for a broad range of ecological modelling, disaster … SAGA – System for Automated Geoscientific Analyses – is a Geographic Information System (GIS) software with immense capabilities for geodata processing and analysis. Familiarity with basic operations in SAGA and QGIS is … Produces a grid shaded as by sunlight. Produces a vector file of drainage channels. This uses data from Northern Australia showing how to change the projection of imported data, clip to an polygon area and conduct a reclassification to create slope classes. Double click each grid to see the result in a map window. Assessing sediment flows from a point field survey, Landform Classification: (Terrain Analysis > terrain Classification > TPI Based Landform Classification), Solar Radiation: (Terrain Analysis > Lighting > Potential Incoming solar radiation), Wind: (Terrain Analysis > Climate and Weather > Wind. This module calculates an index of convergence/divergence regarding to overland flow. Within the tool window, specify the current grid system and the elevation map to be used for analysis and press "okay". The SAGA Wetness Index is similar to the Topographic Wetness Index (TWI), but it is based on a modified catchment area calculation ( out.mod.carea ), which does not treat the flow as a thin film as done in the calculation of catchment areas in conventional algorithms. You will see a list of all the terrain parameters that will be created by this module. System for Automated Geoscientific Analyses (SAGA GIS) is a geographic information system (GIS) computer program, used to edit spatial data.It is free and open-source software, developed originally by a small team at the Department of Physical Geography, University of Göttingen, Germany, and is now being maintained and extended by an international developer community. This section works through the basics of downloading, preprocessing SRTM digital elevation data. A terrain analysis example, creating a slope class grid, is also given in the processing tools section. SAGA and QGIS should be installed on the computer. Basic Processing Techniques - SAGA GIS - YouTube. A new window will then ask you to input the grid system and the elevation grid to use. 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