Hi,
Geoserver implements WFS standards so all parameters can be found from the
documents on page http://www.opengeospatial.org/standards/wfs
Parameters are somewhat different in different WFS versions. That paging does
not work in a reliable way without sorting does not come from the standards, it
is just a Geoserver peculiarity.
A not complete but faster to read list is in
http://docs.geoserver.org/stable/en/user/services/wfs/reference.html
Geoserver supports also a simplified method for making queries
http://docs.geoserver.org/stable/en/user/tutorials/cql/cql_tutorial.html
As far as I know no other WFS server supports CQL queries.
-Jukka Rahkonen-
Lähettäjä: Maria Krommyda via Geoserver-users
[mailto:geoserver-users@lists.sourceforge.net]
Lähetetty: 21. elokuuta 2018 11:09
Vastaanottaja: Ian Turton <ijtur...@gmail.com>
Kopio: geoserver-users <Geoserver-users@lists.sourceforge.net>
Aihe: [Geoserver-users] Σχετ: WFS query with limit and offset
Thank you very much for this clarification.
Is there a document/tutorial where I can find all the parameters that can be
used in a GeoServer URI when querying the data?
Best regards,
Maria.
Στις 7:12 μ.μ. Δευτέρα, 20 Αυγούστου 2018, ο/η Ian Turton
<ijtur...@gmail.com<mailto:ijtur...@gmail.com>> έγραψε:
If you don't specify a sort column(s) you will get the features in FID order
which may or may not be fixed depending on the backend. I would always set the
sort attribute when paging.
Ian
On Mon, 20 Aug 2018 at 14:32, Maria Krommyda
<mariakr1...@yahoo.gr<mailto:mariakr1...@yahoo.gr>> wrote:
Hello Ian,
Thank you very much for your fast response.
I read the blog post that you mentioned and it helped greatly, but I still have
one question.
What I have not understood is if the sorting is mandatory, to ensure the smooth
retrieval of the information, or not.
I feel that the post implies that it is not mandatory, and some testing that I
did seems to confirm that, but I would like to know for sure.
I think that if not specified, the sorting is done by the back end on the first
propertyName?
Thank you once more for your time and the helpful information.
Best regards,
Maria.
Στις 3:52 μ.μ. Δευτέρα, 20 Αυγούστου 2018, ο/η Ian Turton
<ijtur...@gmail.com<mailto:ijtur...@gmail.com>> έγραψε:
This blog post
(https://www.geo-solutions.it/blog/wfs-for-the-masses-adding-support-for-paging-and-sorting-in-geoserver/)
seems to cover this. So it looks like since 2.1 GeoServer has allowed you to
make queries like:
http://localhost:8080/geoserver/topp/ows?service=WFS&version=1.0.0&request=GetFeature
&typeName=topp:states&outputFormat=csv&propertyName=STATE_NAME,PERSONS
&maxFeatures=10&startIndex=10&sortBy=PERSONS%20D
I think the syntax changed for WFS 2.0 but I can't find a reference just now
Ian
On Mon, 20 Aug 2018 at 13:05, Maria Krommyda via Geoserver-users
<geoserver-users@lists.sourceforge.net<mailto:geoserver-users@lists.sourceforge.net>>
wrote:
Hello everyone,
I have set up a GeoMesa Accumulo datastore and I would like to fetch the data
using a limit and an offset (with some sorting if it is required) but I have
not managed to find if this is possible or not.
I have found only this
http://osgeo-org.1560.x6.nabble.com/Specifying-an-offset-in-a-WFS-GetFeature-request-td3802601.html
but it is from 2009 and I cannot find any follow-up.
Can you please let me know if this is possible or not?
Or if there is any tutorial/documentation about what can be used as filter in a
WFS GetFeature request?
Thank you very much for you time.
Best regards,
Maria.
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