Hi all, For a while now I have wondered how botanists create detailed vegetation maps. Usually these are in the form of shapefiles comprising many polygons, e.g. pages 15-17 of Example report So, there has likely been field sampling (quadrats/transects) and this data is mapped over an orthophoto (.ecw or .tiff). I assume they use a program/extension that classifies the orthophoto based on colour ranges. This covers the orthophoto in polygons, which they then re-group into the appropriate vegetation units based on the field sampling data. Any help is appreciated. Cheers, Michael