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== Extract Cross-Sections/Elevations from 2-D Domain to .csv format ==
[[QGIS_Extract_CrossSections | This user contributed tip can now be found here]]
To use QGIS to extract cross sections from your DEM:
1. Draw your cross sections using the Tuflow 1d_xs file, be sure to fill in the source column.
2. Install the QGIS plug-in "profile from line" (note you may also need to install shapely - see [http://osgeo-org.1560.n6.nabble.com/plugin-profile-from-line-td4133320.html]).
3. Run the plugin, it is pretty self explanatory, select your cross sections and dem, choose a suitable sampling interval.
4. Upon running the plugin, QGIGS will add a new points file to the workspace, save this as a .csv. This file will contain the source of every cross section as well as the corresponding chainages and elevations.
5. To split this data into individual .csv files in a format that tuflow can read in, download [[File:XSExtractor.xls]]
6. Follow the instructions in the spreadsheet, after exporting to individual worksheets use the Tuflow "Export Entire Workbook to csv" to obtain all the cross sections in a tuflow format.
Done!
== Plot grid elevation profiles==
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