[Geoserver-users] Geoserver WPS crop coverage output

GeoServer GeoServer User
1

Hello together,

using Geoserver Version 2.8.2 I am currently playing around with the
WPS-Extension trying to clip some coverages. What I'm curious about is
the fact that the output file seems somehow resampled compared to he
original input image. I've uploaded a subset of the original image and
one of the output of the WPS process.

Here's the link to the images:
https://www.dropbox.com/s/mx6txcebeimil4k/wps_result.zip?dl=0

I've used the built-in WPS Request Builder with following parameters:
GS:crop coverage with an ImageMosaic Layer as input and a
polygon-wkt-string as cropping geometry. This process runs just fine but
the output seems to be resampled like I said.
I really would appreciate if someone could help me with that issue.

thanks in advance
Alexander Kipp

2

Hi Alexander,
I don’t have time to try locally now, but maybe with some hints from you this
one can move forward regardless.
Resampled how? And how did you setup your request?

I remember having issues with with WPS builder requests because the
input goes though WCS 1.1, which is not exactly the best protocol to get
a coverage out without any change (no obvious way to just say "give it to
me like it is)… at one point if memory serves me right a second process
was setup to called GetFullCoverage that takes the name of a coverage
and returns it un-modified.

You might want try to use that and chain the crop one in output

Also, if all you want to do is “clip and ship”, there is also the DownloadProcess
module, it’s a community module that you can get from the community
builds here:
http://ares.boundlessgeo.com/geoserver/2.8.x/community-latest/

Cheers
Andrea

···

On Sat, Mar 12, 2016 at 9:17 PM, Alexander Kipp <olektro@anonymised.com1…> wrote:

Hello together,

using Geoserver Version 2.8.2 I am currently playing around with the
WPS-Extension trying to clip some coverages. What I’m curious about is
the fact that the output file seems somehow resampled compared to he
original input image. I’ve uploaded a subset of the original image and
one of the output of the WPS process.

Here’s the link to the images:
https://www.dropbox.com/s/mx6txcebeimil4k/wps_result.zip?dl=0

I’ve used the built-in WPS Request Builder with following parameters:
GS:crop coverage with an ImageMosaic Layer as input and a
polygon-wkt-string as cropping geometry. This process runs just fine but
the output seems to be resampled like I said.
I really would appreciate if someone could help me with that issue.

thanks in advance
Alexander Kipp

Transform Data into Opportunity.
Accelerate data analysis in your applications with
Intel Data Analytics Acceleration Library.
Click to learn more.
http://pubads.g.doubleclick.net/gampad/clk?id=278785111&iu=/4140

Geoserver-users mailing list
Geoserver-users@anonymised.comsts.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/geoserver-users

–

==
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 di Montramito 3/A
55054 Massarosa (LU)
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.

3

Hi Andrea,

thanks for your answer. With resampled I meant the resolution of the output image. As you can see in my exaple images, the output image has a (optically) lower resolution than the input one. But that’s just optically because if I run gdalinfo on both of the images it tells me that they have the same pixel sizes. Anyway you really helped me out with your hint about the DownloadProcess module which is exactly what I was looking for.

With this module and with the GetFullCoverage Process I’m able to reach my goal getting the image data as I uploaded it to Geoserver! Thank you so much!

Cheers
Alexander

···

Am 13.03.2016 um 09:33 schrieb Andrea Aime:

Hi Alexander,
I don’t have time to try locally now, but maybe with some hints from you this
one can move forward regardless.
Resampled how? And how did you setup your request?

I remember having issues with with WPS builder requests because the
input goes though WCS 1.1, which is not exactly the best protocol to get
a coverage out without any change (no obvious way to just say "give it to
me like it is)… at one point if memory serves me right a second process
was setup to called GetFullCoverage that takes the name of a coverage
and returns it un-modified.

You might want try to use that and chain the crop one in output

Also, if all you want to do is “clip and ship”, there is also the DownloadProcess
module, it’s a community module that you can get from the community
builds here:
http://ares.boundlessgeo.com/geoserver/2.8.x/community-latest/

Cheers
Andrea

On Sat, Mar 12, 2016 at 9:17 PM, Alexander Kipp <olektro@anonymised.com> wrote:

Hello together,

using Geoserver Version 2.8.2 I am currently playing around with the
WPS-Extension trying to clip some coverages. What I’m curious about is
the fact that the output file seems somehow resampled compared to he
original input image. I’ve uploaded a subset of the original image and
one of the output of the WPS process.

Here’s the link to the images:
https://www.dropbox.com/s/mx6txcebeimil4k/wps_result.zip?dl=0

I’ve used the built-in WPS Request Builder with following parameters:
GS:crop coverage with an ImageMosaic Layer as input and a
polygon-wkt-string as cropping geometry. This process runs just fine but
the output seems to be resampled like I said.
I really would appreciate if someone could help me with that issue.

thanks in advance
Alexander Kipp

Transform Data into Opportunity.
Accelerate data analysis in your applications with
Intel Data Analytics Acceleration Library.
Click to learn more.
http://pubads.g.doubleclick.net/gampad/clk?id=278785111&iu=/4140

Geoserver-users mailing list
Geoserver-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/geoserver-users

–

==
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 di Montramito 3/A
55054 Massarosa (LU)
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.