Hi Jukka, regarding closed linestring ABCDA (not linering), as you pointed,
there is the conversion tool by Ede (convert geometry to linering,
multipoints, etc) on right click context menu, (draw a polygon and that
convert to a linestring)
Or you can use this set of tools (
http://sourceforge.net/projects/opensit/files/Openjump/PlugIn/CADExtension/)
that I made some months ago: within the editing toolbar there will be a
"draw closed linestring" too (ABCDA)l.
The trick you described for "lazo" closed linestring seems the only way to
draw ABCDAB linestring, I think
Peppe
2013/6/6 Rahkonen Jukka <jukka.rahko...@mmmtike.fi>
> Hi,
>
> It is a little bit difficult to draw a closed linestring (like A-B-C-D-A)
> or linestring that makes a loop like in a lasso (A-B-C-D-B) because it is
> not possible to snap with the new vertices before the feature is finished.
> There are two simple workarounds. User can digitize first a point to snap
> (A or B respectively). Or then user can digitize the line as A-B-C-D,
> finish it, select the line and continue drawing from D. In the first case
> user can also digitize a closed area and convert it into linestring with
> the geometry converter tool.
>
> All the methods are simple but user needs to know them first. I wonder if
> we should have a snapping option "Snap to just inserted vertices" or
> something like that? However, the need for such snapping is not very
> common.
>
> -Jukka Rahkonen-
>
>
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