I'm mapping agricultural cropping systems in Brazil using QGIS. From satellite images I got an raster file with 5136 x 5136 pixels from my field work.
Now I need to associate many soil/climate parameters to this field work. One of them is rainfall. For that I uploaded the available meteorological stations (CSV - lat/lon) in my map and now I need to assume the closest meteorological station for each of my pixel (the boundaries of my map).
I tried interpolate, but it gives me the average of the meteorological station' ID and what I need is only the ID of the closest.
How can I do that using QGIS 1.8?
Thank you very much