I am for the moment, quite stumped. I have a layer of points to which i have retrieved values from an underlying raster. From these values, I am trying to create a TIN, using the Interpolation tool in QGIS. The tool runs with no errors, but the result is a raster of no data. I have tried:
Using QGIS 2.18 (Las Palmas de G.C:) and running Windows 10
- Setting the regional settings to using a period and a comma for the decimal marker
- Different tools, including IDW and squared TIN in the Interpolation dialog. This includes SAGA Trinagulation tool (this returns an error - tool not found)
- Different projections for the points and the raster
- Opening the points and running the analysis in a separate project
- Changing the directories to avoid spacces in directory names
- Changing the output file type (.asc and .tif)
- Running the interpolation in an older version of QGIS (2.8)
Nothing has worked so far. The only diference was using squared TIN, that produced values of 0 instead of No data.
EDIT: here's a screencap showing the points and a sample of the attribute table. Second column is the data used, it's the same as the first with negative nubmers set to 0.