Hello,
i hope anybody can help me. Sorry if it is a duplicate but I can't find the way I solve my problem:

My users should can draw (edit, delte) a bounding box and then submit the geometry without (!) editing the node.
Admin should then see the coordinates of BB (WKT, KML...) in the table, field...
Now I use an openlayers gefield_input_widget map with "draw feature" tools but I don't know where I can grab the features by user.
Any help will be appreciated!