[postgis-users] Postgis Topology and slow topology.TopoGeo_addLinestring on big datasets

[Lars Aksel Opsahl]

Hi

________________________________

>From: postgis-users <postgis-users-bounces at lists.osgeo.org> on behalf of Sandro Santilli <strk at kbt.io>

>Sent: Wednesday, February 26, 2020 12:19 PM

>To: PostGIS Users Discussion <postgis-users at lists.osgeo.org>

>Subject: Re: [postgis-users] Postgis Topology and slow topology.TopoGeo_addLinestring on big datasets

>

>On Wed, Feb 26, 2020 at 11:10:36AM +0000, Lars Aksel Opsahl wrote:

>

>> Yes I can do that but then I have to remove this extra lines when done.

> > This should by able to do by checking if two faces that share edge belongs the same original polygon.

>

>Yes, it is a way.

>

>

>> If checkout this code "git fetch origin pull/28/head:batch-topo2" is any problem for me to compile this code and test it ?

>

>The code in that branch is broken, as shown by the bot

>building it, unfortunately.

>

>> Or do I have to do a lot changes in my own code to test it ?

>

>Yes, the code would also need to be changed, and won't be performant

>because that branch only touches ST_CreateTopoGeo, which needs to

>do everything at once (loading all in memory).

>

>--strk;

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Ok Thanks again, I will maybe do a test using alternative one first then.


Lars
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