[gdal-dev] ogrmerge running very slow on merging GML to GPGK

[Even Rouault]

Le 20/10/2024 à 00:06, Even Rouault via gdal-dev a écrit :
>
> Vedran,
>
> the issue is that your GML files reference a 
> http://cap115:8101/geoserver/oss/wfs?service=WFS&version=1.0.0&request=DescribeFeatureType&typeName=oss%3AKATASTARSKE_OPCINE 
> XML schema, and if the cap115:8101 server is not reachable, GDAL 
> spends some time waiting for it before giving up.
>
> If all your .gml files share the same schema, you can actually use the 
> generated .gfs file (which is a OGR GML specific schema format) for 
> all of them, which will skip the step trying to download the XML schema
>
> Just add " --config GML_GFS_TEMPLATE katastarske_opcine.gfs" (without 
> the double quotes) to your ogrmerge command line (cf 
> https://gdal.org/en/latest/drivers/vector/gml.html#configuration-options), 
> and this should run in one second total.
>
and to avoid any warning, before running ogrmerge, manually edit 
katastarske_opcine.gfs to modify  <Width>12</Width> to <Width>15</Width>
>
> Even
>
> Le 19/10/2024 à 22:58, Vedran Stojnović via gdal-dev a écrit :
>> Hi all,
>>
>> not sure if this is a bug report so I want to check here if someone 
>> has experience with this.
>> I need to merge 98 GML files, each having one MultiLineString feature 
>> into one layer so I'm using:
>> ogrmerge -single -f GPKG -o merged.gpkg *.gml
>>
>> But it takes very long time (few seconds per file), and in the 
>> meantime gfs files are created every few seconds. I'm running 
>> ogrmerge from OSGeo4W Shell on Windows 11 PC, GDAL 3.9.2, released 
>> 2024/08/13.
>>
>> My dataset  is available here (1 MB ZIP with all 98 files): 
>> https://we.tl/t-V8Azs8WokU
>>
>> -- 
>> Kind regards,
>> Vedran Stojnović.
>>
>> _______________________________________________
>> gdal-dev mailing list
>> gdal-dev at lists.osgeo.org
>> https://lists.osgeo.org/mailman/listinfo/gdal-dev
> -- 
> http://www.spatialys.com
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-- 
http://www.spatialys.com
My software is free, but my time generally not.
Butcher of all kinds of standards, open or closed formats. At the end, this is just about bytes.
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