Dear Daniel,
I tried this old advice/instruction, and it works in Collect-Data Management/Map, however it crashes in Collect-Mobile: how to solve? In Collect-Map I see only the (e.g. 4) corner-points; can they be connected to see a real polygon? This procedure results as 'data' coordinate-points; can I design/digitize also a polygon as sample 'area': at cluster (biotope) (e.g. biotope-area) level to define the area to sample plots(biotope-elements) plots(e.g. biotope-elements) within? Joseph