Hi Stefan,
Actually the issue was that without playing with densification and tolerance
(which is documented) the result did contain all the vertices but not the whole
area of the polygons.
[cid:image001.png@01D1D0CE.3B482800]
And it may be that some users would expect the result to be something like
[cid:image003.png@01D1D0CE.9E1E95E0]
I guess that it is hard to define how the result should be as a basis for the
algorithm. Perhaps "follow the shapes as closely as possible while keeping the
perimeter of the linear ring below threshold [].
-Jukka Rahkonen-
Stefan Steiniger wrote:
Hi,
actually the question is: What do you expect for a result, Jukka? The picture
by Michaël seems reasonable to me and I wonder how it should look for you.
cheers.,
Stefan
On 6/23/16 17:30, Michaël Michaud wrote:
Hi Jukka,
As far as I remember (I did not find confirmation in Eric's documentation), the
algorithm produces a single polygon.
In your case, there are several input polygons. If you densify their
boundaries, you'll get something close to the original polygons, but with
narrow corridors to rely them. I think this is a limitation of the algorithm
rather than a bug. Here is what I get with a densification of 1m. Would be
interesting to overcome this limitation though.
[cid:image002.png@01D1D0CE.3B482800]
Le 23/06/2016 à 14:50, Rahkonen Jukka (MML) a écrit :
Hi,
I was playing with the Concave hull plugin and got usually good results.
However, the attached data gives odd results even if I followed the hint to
densify the geometries. Sending to the list if some developers happens to be
interested in having a look.
-Jukka Rahkonen-
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