First Steps. Setup, data import, visualization and basic terrain analysis. Volker Wichmann

Transcription

1 SAGA First Steps Setup, data import, visualization and basic terrain analysis Volker Wichmann

2 SAGA Setup on Windows Download of SAGA binaries (1) (2) >> Downloads SourceForge) 2

3 SAGA Setup on Windows (3) >> SAGA (4) >> SAGA bit 32bit 3

4 SAGA Setup on Windows (5) Extract zip file: 4

5 SAGA Setup on Linux, FreeBSD Binary packages, see Compiling from source, see Compiling%20a%20Linux%20Unicode%20version Compiling%20SAGA%20on%20FreeBSD 5

6 SAGA Data Import Native Formats Tables (tab-delimited *.txt, *.dbf) Shapes (ESRI Shapefiles, *.shp) Grids (SAGA grids, *.sgrd) Point Clouds (SAGA pointcloud, *.spc) Other Formats 10 Import/Export module libraries with almost 70 modules including GDAL/OGR (includes a SAGA grid driver since version 1.7.1) liblas 6

7 SAGA Data Import Import From GeoTIFF B A C Grids get sorted by Grid System: Cellsize Colums / Rows Lower left coordinate 7

8 SAGA Data Visualization Map View Visualization in a Map View A double left-click on the dataset in the Data tab opens a new Map View Explore the Object Properties window: Settings, Description, Legend and History 8

9 SAGA Data Visualization Map View Visualization in a Map View Change the color palette from greyscale to SAGA's default B A 9

10 SAGA Data Visualization Map View Visualization in a Map View Change the color palette from greyscale to SAGA's default C D 10

11 SAGA Data Visualization Analytical Hillshading A B C D double left-click 11

12 SAGA Data Visualization Analytical Hillshading 12

13 SAGA Data Visualization 3D View Visualization in a 3D View Every Map View can be visualized in 3D A B 13

14 SAGA Data Visualization 3D View Visualization in a 3D View 14

15 SAGA Terrain Analysis Basic Terrain Analysis A selection of basic parameters and objects to be derived from a Digital Terrain Model using standard settings. The meta-module is coupling the following modules: Terrain Analysis Preprocessing: Terrain Analysis Lighting, Visibility: Terrain Analysis Morphometry: Grid Filter: Terrain Analysis Morphometry: Terrain Analysis Morphometry: Terrain Analysis Hydrology: Terrain Analysis Hydrology: Terrain Analysis Hydrology: Terrain Analysis Hydrology: Terrain Analysis Channels: Terrain Analysis Channels: Sink Removal -> hydrological sound DTM Analytical Hillshading Slope, Aspect, Curvature -> slope, aspect Simple Filter -> smooth DTM Slope, Aspect, Curvature -> profile and plan curvature Convergence Index Catchment Area (Parallel) Flow Width and Specific Catchment Area Topographic Wetness Index (TWI) LS Factor Channel Network and Drainage Basins Vertical Distance to Channel Network 15

16 SAGA Terrain Analysis Basic Terrain Analysis A C B 16

17 SAGA Terrain Analysis Basic Terrain Analysis Analytical Hillshading Slope Aspect Plan Curvature Profile Curvature Convergence Index 17

18 SAGA Terrain Analysis Basic Terrain Analysis Catchment Area Wetness Index LS Factor Altitude above Ch. Network Ch. Network Base Level Ch. and Drainage Basins 18