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.
![../../../_images/profil001.png](../../../_images/profil001.png)
Raster Profile#
Create a Raster
Set up the raster in the Profile Tool widget. In this example, the grid elevation raster is used. To create a grid elevation raster, use the Saga-Rasterize tool. On the Main QGIS Menu, click Processing>Toolbox.
![../../../_images/profil002.png](../../../_images/profil002.png)
Enter the search term Rasterize in the Processing Toolbox search feature. Double click the Saga Rasterize tool.
![../../../_images/profil003.png](../../../_images/profil003.png)
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.
![../../../_images/profil004.png](../../../_images/profil004.png)
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.
![../../../_images/profil005.png](../../../_images/profil005.png)
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.
![../../../_images/profil006.png](../../../_images/profil006.png)
Click the FLO-2D Info Tool and click on a channel segment.
![../../../_images/floinfo.png](../../../_images/floinfo.png)
![../../../_images/profil007.png](../../../_images/profil007.png)
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.
![../../../_images/profil008.png](../../../_images/profil008.png)