Hi,

I tried to read a relatively small BBOX from an OAPIF server but the process 
feels rather slow and I do not quite understand what I am seeing in the log.

ogr2ogr -f GPKG test.gpkg 
OAPIF:https://avoin-paikkatieto.maanmittauslaitos.fi/maastotiedot/features/v1/?api-key=xxxx
 -spat 25 65 25.1 65.1 -oo PAGE_SIZE=10000 --debug on --config cpl_curl_verbose 
yes

Excerpts from the log:

HTTP: 
Fetch(https://avoin-paikkatieto.maanmittauslaitos.fi/maastotiedot/features/v1/collections/osoitepiste/items?api-key=xxxx&f=json&limit=10000)
HTTP: These HTTP headers were set: Accept: application/geo+json, 
application/json
...
> GET 
> /maastotiedot/features/v1/collections/osoitepiste/items?api-key=xxxx&f=json&limit=10000
>  HTTP/1.1
Host: avoin-paikkatieto.maanmittauslaitos.fi
Accept-Encoding: gzip
Accept: application/geo+json, application/json

* Mark bundle as not supporting multiuse
< HTTP/1.1 200 OK
...
GeoJSON: First pass: 56.54 %
GeoJSON: First pass: 100.00 %
HTTP: 
Fetch(https://avoin-paikkatieto.maanmittauslaitos.fi/maastotiedot/features/v1/collections/osoitepiste/items?api-key=xxxx&f=json&limit=10000&bbox=25,65,25.1000000000000014,65.0999999999999943)
...
> GET 
> /maastotiedot/features/v1/collections/osoitepiste/items?api-key=xxxx&f=json&limit=10000&bbox=25,65,25.1000000000000014,65.0999999999999943
>  HTTP/1.1
...
< Content-Length: 309
GDALVectorTranslate: 0 features written in layer 'osoitepiste'

Do I read right that GDAL is first reading one page, in this time 10000 
features without BBOX, perhaps for resolving the schema, and then makes a new 
query with BBOX? In this case the BBOX query finds nothing. Reading 10000 
features on the first round and then discarding everything feels too expensive. 
Could it be enough to read for example 10 features that is the default page 
size on the first round instead of the full page?

-Jukka Rahkonen-
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