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.

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