Error

[Elpida2]

Upon running module 2 at QGIS v. 3.16 I am getting the following error:

Traceback (most recent call last): File "C:/Users/Elpida/AppData/Roaming/QGIS/QGIS3\profiles\default/python/plugins\geomelwatershed-master\sub\geomelCN.py", line 136, in processAlgorithm log = open(path, "w") OSError: [Errno 22] Invalid argument: './/CN_Calculation_Log_point?crs=epsg_2100&uid={60a836ea-102c-4f4f-928b-478a67673cd2}_2022-06-22 16_30_07.txt'

Execution failed after 14.34 seconds

How can I resolve it?

[lymperis-e]

Elpida, thank you for your feedback! The plugin is configured in a way that it uses the current QGIS Project directory as the root directory for most of the paths it uses. So what is happening here is that the plugin is trying to save a log file, but fails to open it for writing, because the Project path does not exist.

Suggested Solution: save your QGIS Project to an actual directory. Also make, sure that the path to this directory only contains latin characters (and preferably not deven spaces), because SAGA (of which some algorithms are used) struggles with greek/cyrillic.

[Elpida2]

Thank you for your immediate response.

I established that the problem was caused due to the fact that Pour Point was saved as 'Pour Point' so I changed it to 'Pour_Point' in order for the algorithm to be executed.

Also the layer Clipped Channel Network was not produced at module 2 so I used the command 'Channel Network' from Saga toolbox in order to proceed to module 3.

If I may ask another question slightly irrelevant, as I saw you used a soil map. Where did you find it? Also do you happen to know where can i extract a hydrolithologic map of Attica (shp format).

[lymperis-e]

Elpida, I am glad you were able to proceed. Was there no Channel Network output at all?

Regarding the soil map, if you go to the plugin description, on the PLugins menu of QGIS, I have attached a link to Google Drive, which contains both the soil map and the land cover map.

Data The soil map is the 1997 Soil Map of Greece and the land cover is the 2018 Corine Classification

Maps The hydrolithologic map is (as you probably know..) a painful subject... I am not aware of it being distributed in .shp. The Special Secretariat for Water has it, and I hope they publish it in the near future. You could also address them and ask if they can provide it. You could try and digitize the raster version of the map or even try to georeference this one. You probably already know of those two, but I attached them anyway in case they are of help.