Hi again, last night I was playing with the wxGUI digitiser, first time I've used it (was not available in 6.4.1?)
In figuring out how select/commit worked a little different with mouse, and how the display showed 'live' movements, I used the move/add/remove vertex tools, the edit line/boundary, move features, and delete features. Somewhere in my experimenting, the whole thing went weird on me. Started showing random lines from corner of window to my (moving) mouse cursor, duplicated boundaries when I chose to move a single point, refused to close after clicking on the 'exit digitising' button and choosing 'no-don't save'. Eventually, ended up with most of the vector layer gone (it was composed of boundaries and centroids), topology obviously stuffed, one boundary I hadn't gone near still showed on the map and the last half-dozen 'moves' of another boundary showed as half-dozen overlapping boundaries, each with one of the vertices (whichever I'd moved in that step) in a different position. Got a whole heap of error messages in output and also topology errors in terminal from where I ran GRASS. Can post them if anyone interested. Had to dig out a backup of that vector and restore it to the GRASS folder. Have tried, much more carefully, to repeat process this morning. Adding vertex, moving boundary/centroid, moving vertices, seems to be OK. So far, only thing I can find again, is when choosing 'exit' and 'no', the changes I just did ARE saved (e.g. i'd opened digitiser, moved a boundary, exit-nosave, but boundary shows where I'd moved it to, not where it was previously). Doesn't seem right to me - I know the tcltk digitiser saved things as they were done, does the wxGUI in fact do the same thing, in which case why the yes/no option to save when quitting digitiser? Tried a couple of tools from 'additional tools' icon/menu; some like 'split line/boundary' I've used before, and can find a v.split page in GRASS help, whereas others like merge, connect, even snap, seem to be new options or modifications of older techniques, which didn't do what I expected initially, and couldn't find something in GRASS help where I expected to, e.g. v.connect, v.merge, etc... Any pointers on where to look for info on the 'additional tools' would be appreciated. I've got enough grasp of the main tools in digitiser that have their own icons already. As for repeating my destruction of a vector layer, who knows? maybe clicking left mouse button to select, then again to where I wanted to move/add a vertex when I shoulda used right button (that was how old tcltk worked - left select, left new spot, right commit - old habits!) confused it before I finally clicked right button. Or clicking on a centroid with 'move vertex' tool (no move happened, but centroid did momentarily disappear until i right-clicked again)... or when the 'exit digitiser' seemed to partly return the map display to 2d view but still left the digitising toolbar showing, and I then re-opened the vector to digitise some more... I think I was a fair way into playing before I started noting odd things and recording the error messages. -Shane. _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user
