I am attempting to interpolate data of a point shapefile. In the attribute table all attributes are shown correctly. When I am trying to interpolate them with Raster >> Interpolation no attributes to choose are shown.
I am not sure which fields you are talking about, but it seems you are attempting to interpolate based on a field of joined table which is not in the original shapefile. To use interpolation on a shapefile there are many points you have to check:
- The fields should be embedded in the attribute table
- Field names should not exceed 10 characters in shapefile
- Spaces are not valid in field names
- Fields type should be of numerical type. If the fields are of text type you cannot select anything.