[GRASS-user] topological errors in v.extract results

[Markus Metz]

On Wed, Aug 17, 2016 at 11:54 AM, Blumentrath, Stefan
<Stefan.Blumentrath at nina.no> wrote:
[...]
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> I try to compare with GRASS GIS 7.1 but import there is painfully slow.
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> So I had at: https://trac.osgeo.org/grass/ticket/2185
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> However, I use exactly the same data, from the same database, on the same
> (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 with
> 7.0.4

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.

Markus M

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> 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...
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> I am glad for any hints,
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> Stefan
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