[Geoserver-users] GetFeature BBox

GeoServer GeoServer User
1

Hi!

I'm using GetFeature with bbox to retrieve features which are inside the given bbox.

Please see the image in the attachment.

I'm using the bbox of Polygon2 with GetFeature. I would expect to get only the feature of Polygon2. But GetFeature also gives me the bbox of Polygon1.
Is this because of the Bbox of Polygon1? How can I avoid this?

Hotlink to image: http://fs5.directupload.net/images/160209/9cfh8ip5.png

--
Beste Grüße

Volkan Gümüs
F1-Computer.de
Tel: 0231 223 985 60
Fax: 0231 330 295 08
Mail: hallo@anonymised.com

geoserver_getfeature.png

2

On Tue, Feb 9, 2016 at 10:48 AM, Volkan Gümüs <hallo@anonymised.com> wrote:

Hi!

I'm using GetFeature with bbox to retrieve features which are inside the
given bbox.

Please see the image in the attachment.

I'm using the bbox of Polygon2 with GetFeature. I would expect to get only
the feature of Polygon2. But GetFeature also gives me the bbox of Polygon1.
Is this because of the Bbox of Polygon1? How can I avoid this?

You have two quick choices:
* Use an explicit intersection filter (making a XML POST request) instead
of a BBOX one
* Go to the store configuration and disable the "loose bbox" checkbox.
Mind, this will also make all WMS requests slower, and full intersection
tests
will be used there too

A not so quick choice is to change the implementations so that WFS uses a
strick bbox implementation for accuracy, but WMS a loose
one for speed. This would require writing code, there is a guide to follow
this path here:
https://github.com/geoserver/geoserver/wiki/Successfully-requesting-and-integrating-new-features-and-improvements-in-GeoServer

Cheers
Andrea

--

GeoServer Professional Services from the experts! Visit
http://goo.gl/it488V for more information.

Ing. Andrea Aime
@geowolf
Technical Lead

GeoSolutions S.A.S.
Via Poggio alle Viti 1187
55054 Massarosa (LU)
Italy
phone: +39 0584 962313
fax: +39 0584 1660272
mob: +39 339 8844549

http://www.geo-solutions.it
http://twitter.com/geosolutions_it

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3

Thanks for your fast replys.

I got the possibility to do the GetFeature and a PostGIS intersection check with with the bbox2 and all the features from the GetFeature call before the response get’s back to the client.
I think this should be faster than an intersection filter.

What do you think?

···

Am 09.02.2016 um 11:28 schrieb Andrea Aime:

On Tue, Feb 9, 2016 at 10:48 AM, Volkan Gümüs <hallo@anonymised.com> wrote:

Hi!

I’m using GetFeature with bbox to retrieve features which are inside the given bbox.

Please see the image in the attachment.

I’m using the bbox of Polygon2 with GetFeature. I would expect to get only the feature of Polygon2. But GetFeature also gives me the bbox of Polygon1.
Is this because of the Bbox of Polygon1? How can I avoid this?

You have two quick choices:

  • Use an explicit intersection filter (making a XML POST request) instead of a BBOX one
  • Go to the store configuration and disable the “loose bbox” checkbox. Mind, this will also make all WMS requests slower, and full intersection tests
    will be used there too

A not so quick choice is to change the implementations so that WFS uses a strick bbox implementation for accuracy, but WMS a loose
one for speed. This would require writing code, there is a guide to follow this path here: https://github.com/geoserver/geoserver/wiki/Successfully-requesting-and-integrating-new-features-and-improvements-in-GeoServer

Cheers
Andrea

–

==
GeoServer Professional Services from the experts! Visit
http://goo.gl/it488V for more information.

Ing. Andrea Aime

@geowolf
Technical Lead

GeoSolutions S.A.S.
Via Poggio alle Viti 1187
55054 Massarosa (LU)
Italy
phone: +39 0584 962313
fax: +39 0584 1660272
mob: +39 339 8844549

http://www.geo-solutions.it
http://twitter.com/geosolutions_it

AVVERTENZE AI SENSI DEL D.Lgs. 196/2003

Le informazioni contenute in questo messaggio di posta elettronica e/o nel/i file/s allegato/i sono da considerarsi strettamente riservate. Il loro utilizzo è consentito esclusivamente al destinatario del messaggio, per le finalità indicate nel messaggio stesso. Qualora riceviate questo messaggio senza esserne il destinatario, Vi preghiamo cortesemente di darcene notizia via e-mail e di procedere alla distruzione del messaggio stesso, cancellandolo dal Vostro sistema. Conservare il messaggio stesso, divulgarlo anche in parte, distribuirlo ad altri soggetti, copiarlo, od utilizzarlo per finalità diverse, costituisce comportamento contrario ai principi dettati dal D.Lgs. 196/2003.

The information in this message and/or attachments, is intended solely for the attention and use of the named addressee(s) and may be confidential or proprietary in nature or covered by the provisions of privacy act (Legislative Decree June, 30 2003, no.196 - Italy’s New Data Protection Code).Any use not in accord with its purpose, any disclosure, reproduction, copying, distribution, or either dissemination, either whole or partial, is strictly forbidden except previous formal approval of the named addressee(s). If you are not the intended recipient, please contact immediately the sender by telephone, fax or e-mail and delete the information in this message that has been received in error. The sender does not give any warranty or accept liability as the content, accuracy or completeness of sent messages and accepts no responsibility for changes made after they were sent or for other risks which arise as a result of e-mail transmission, viruses, etc.

-- 
Beste Grüße

Volkan Gümüs
F1-Computer.de
Tel: 0231 223 985 60
Fax: 0231 330 295 08
Mail: [hallo@anonymised.com](mailto:hallo@anonymised.com)