v.digit and snapping

Katie Alvin kalvin at mt.nrcs.usda.gov
Wed Dec 23 09:45:22 EST 1998


On your digitizing menu, be sure to select type "area edge" (hit the "t"
key to select it). Maybe you were digitizing lines instead of areas. And
of course, create your last node on top of your first node, then right
click to stop digitizing. We use a digitizing threshold of .005 (which
will affect stream digitizing with a tablet) and a snapping threshold of
.01 . This works well for us.

Good luck!

Markus Neteler wrote:
> Hi,
> usually I am working raster-oriented, so I have questions
> concerning snapping nodes in v.digit:
> When digitizing a polygon (with mouse digitizer), how to
> make the end nodes of a polygon to be snapped automatically?
> Changing the snapping distance didn't help (and using always
> the Edit menu is a ot of extra work). What did I miss?
> I need the polygons to be closed.
> Markus

Katie Alvin
FOCS/FGI/GIS Specialist
USDA NRCS, Bozeman, MT
kalvin at mt.nrcs.usda.gov

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