[GRASS-user] topological errors in v.extract results
Stefan.Blumentrath at nina.no
Thu Aug 25 13:49:06 PDT 2016
From: Markus Metz [mailto:markus.metz.giswork at gmail.com]
Sent: 25. august 2016 18:36
To: Blumentrath, Stefan <Stefan.Blumentrath at nina.no>
Cc: grass-user grass-user (grass-user at lists.osgeo.org) <grass-user at lists.osgeo.org>
Subject: Re: [GRASS-user] topological errors in v.extract results
On Wed, Aug 17, 2016 at 11:54 AM, Blumentrath, Stefan <Stefan.Blumentrath at nina.no> wrote:
> I try to compare with GRASS GIS 7.1 but import there is painfully slow.
> So I had at: https://trac.osgeo.org/grass/ticket/2185
> However, I use exactly the same data, from the same database, on the
> (local) harddrive in 7.1 and it is just !much! slower than 7.0.4 on
> import... Snapping vertices Step 1 takes significantly longer than
G72 and trunk use a new search tree for snapping that needs much less memory. Unfortunately, balancing this search tree did not scale well with millions of vertices. I improved the balancing method in trunk
r69253 and G72 r69254.
> Cleaning topology in 7.1 from a GRASS vector map earlier imported with
> 7.0.4svn is BTW not noticeably slower in 7.1 compared to 7.0.4...
> I am glad for any hints,
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> grass-user at lists.osgeo.org
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