I am new to GIS and hope this is not too basic. I am using QGIS.

Say I have two shapefiles: SHP1, with attributes allocated to municipalities, and another shapefile I built from a wkt file, SHP2, which is an orthogonal 60 by 60 grid.

I wish to do the following: add an attribute column to SHP which reflects the weighted average of an attribute from the underlying SHP1.

thanks for any help

Alex