New answers tagged profile
The file can be opened in Notepad, which can then be saved as a .csv and imported via mmqgis, so all fine here now!
I had the same problem and tried James S' solution, but couldn't get the GDAL to work with Fiona. Then I discovered the SAGA algorithm "Cross Profiles" in QGIS 2.4, and got exactly the result I wanted and that I presume you are looking for too (see below).
It is handled by an esri geoprocessing service, which it is recommended that you update from the old service. The details page mentions plenty of good reference information.
If I understand your question correctly you are trying to know, on your DEM profile graph, where the water retention basin starts and ends. Here's a bit of a hacked-together idea: What if you raserized your water retention basin polygon? Then, using the same "cut" that you generated your profile from the DEM, generate a profile for the rasterized basin by ...
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