Profile Tool#
The profile tool is primarily used to review the channel profile but can also be used to review table data for specific features.
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Method 1: Create an Elevation Raster using MapCrafter (Recommended)#
Note
To use this method, the TOPO.DAT file must be previously exported.
Open FLO-2D MapCrafter Plugin.
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Select the export folder and follow the figure below to create the Elevation Raster.
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Click OK on the message.
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The GROUND_ELEVATION raster is added to the project.
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Note
For more information on MapCrafter, check the FLO-2D-MapCrafter Wiki
Method 2: Create an Elevation Raster using SAGA provider#
On the Main QGIS Menu, click Processing>Toolbox.
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Enter the search term Rasterize in the Processing Toolbox search feature. Double click the Saga Rasterize tool.
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Note
In some QGIS installations, the SAGA provider may not be active. Visit the QGIS Official Plugin Repository to install/activate the provider.
Change the dialog box as shown below and click Run. Cell size is the grid element size. Fit = cells will ensure that the raster pixels are centered on the grid elements. Saga-Rasterize is a good raster generator for FLO-2D data because it builds a raster with hidden null data. QGIS has many raster generators, and they all work slightly differently.
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The raster that is created is a temporary layer called Rasterize. This layer should be saved to a permanent layer using the QGIS Save As feature. This feature is found by right clicking the layer.
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Plot a profile of a polyline on the raster.#
The profile tool works for Levee, Channel and Street polylines that are digitized in the user layers only. This example will test it on a channel polyline.
Click the Raster profile radio button and set the raster. This example uses Grid Elevation raster.
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Click the FLO-2D Info Tool and click on a channel segment.
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Select the segment and the elevation profile along the segment line is plotted in the FLO-2D Plot area and the Raster data along the channel line is printed to the FLO-2D Table. Any data that can be rasterized can be plotted in this manner. The table can be copied to an Excel sheet and saved.
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