Load a grid file such as a USGS SRTM file
- Run Saga GIS. Select Geoprocessing | File | Grid | Import | Import USGS SRTM Grid.
The Import USGS SRTM Grid dialog box appears. - Click the Browse button in the Files field. Choose an SRTM file e.g. N21E093.hgt.
- Click Open.
- Click Okay.
The SRTM file is loaded and shown in the Data tab.
- Under the Data tab, mouse right click on the loaded grid file e.g. N21E093.
- In the pop up context menu, choose Add to Map.
The grid file is displayed in a map window. - Select Geoprocessing | Terrain Analysis | Profiles | Swath Profle [Interactive].
The Swath Profile dialog box appears. - In the Grid system field, choose the loaded grid file's system e.g. 0.000833; 1201x 1201y; 93x 21y option.
- In the DEM field, choose the loaded grid file, e.g. N21E093.
- Optional. Change the Swath Width if necessary.
The message Interactive tool execution has been started is displayed in the Messages pane.
- In the Toolbar, click the Action icon (that looks like a black NW arrow).
- In the map window, click a few points to draw the swath profile.
- To complete the drawing, press the mouse right button.
- To exit the interactive command, select Geoprocessing | Swath Profle [Interactive].
The Tool Execution prompt appears. - Click Yes.
The message: "Interactive tool execution has been stopped" is shown in the Messages pane.
Note: This may take a while as the command will sample the terrain to calculate the points.
- In the Data pane, mouse right click on the newly created profile points e.g. Profile [N21E093].
- In the pop up menu, choose Attributes | Diagram.
The Properties dialog box appear. - In the X Axis Values field, choose D (for Distance).
- In the X Axis Label field, choose D.
- In the Attributes field, toggle on Z, Z [min], Z[max].
- Set other options if necessary.
- Click Okay.
The profile line(s) are displayed.
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