[GRASS5] [bug #1431] (grass) [RFE] r.digit support for vector point digitization please?

Radim Blazek blazek at itc.it
Mon Nov 18 05:06:52 EST 2002

On Monday 18 November 2002 06:57 am, Request Tracker wrote:
> It would be nice if the ability to digitize vector point data were added to
> r.digit.
> It may better belong to v.digit, but r.digit seems to already be very close
> to the functionality I desire. Here's a description of my current
> workaround to give you an idea of why it is needed:
> Digitizing of spot heights/depths off of a raster map (imported TIFF):
> (There may well be a much better way of doing this)
> After r.in.tiff, i.group, i.target, i.point, and i.rectify to get the
> scanned-in map registered correctly, I tried using v.digit with 'Backdrop
> CELL Map' turned on. (I assume this is the 'correct' method)
> It worked, but the process of digitizing a couple of points, quiting to
> the label menu, entering a new category and unique attribute label, then
> selecting the relevant point on the map, then zoom to a new section, and
> repeat, is tremendously inefficient when you are trying to put in several
> hundered points.
> Being able to click on a point, then be prompted for a label, <enter>
> repeat, with category numbers auto-incrementing in the background would be
> much nicer, which led me to do it the way I did it:
> Use i.points to select positions, enter the spot height and a zero when
> prompted for an easting and northing, and repeat. After that's all done,
> save the resulting table to a file, edit the file to remove the uneeded
> columns and header, and s.in.ascii the results.
> Worked quite well, but it seems a tad bit round-about.

I believe that v.digit/grass51 will be more efficient and user friendly:


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