[Geoserver-users] WCS statistics

GeoServer GeoServer User
1

Hi,

I want to get the statistics (min, max, mean, and stdv) of a raster in GeoServer.

I have looked at WPS and REST but no luck. The WPS does not seem to have this process implemented. The REST API should be able to give me this answer at the following endpoint:

http://localhost:8080/geoserver/rest/workspaces//coveragestores//coverages/.xml

When looking at the xml at the above URL it seems that the max and min values are not calculated but shows some kind of default values (see range tag below):

GRAY_INDEX GridSampleDimension[-32768.0,-32768.0] -32768.0 -32768.0 -32768.0 SIGNED_16BITS

I’ve also noticed that if I manually put in the min and max value for the geotiff when publishing it in GeoServer, those values show up at the REST endpoint above.

Shouldn’t GeoServer calculate this automatically when uploading the raster?

Have I missed something, is there any other way of getting raster statistics in GeoServer?

Regards,

Anton

2

Hi Anton,
you did not miss anything.
There was a discussion on the topic in the last few months in geoserver-devel,
but I don’t think it moved past the talking stage, have a look at the list archives

Cheers
Andrea

···

On Wed, May 4, 2016 at 9:40 AM, Anton Lundkvist <antonlundkvist@anonymised.com…84…> wrote:

Hi,

I want to get the statistics (min, max, mean, and stdv) of a raster in GeoServer.

I have looked at WPS and REST but no luck. The WPS does not seem to have this process implemented. The REST API should be able to give me this answer at the following endpoint:

http://localhost:8080/geoserver/rest/workspaces//coveragestores//coverages/.xml

When looking at the xml at the above URL it seems that the max and min values are not calculated but shows some kind of default values (see range tag below):

GRAY_INDEX GridSampleDimension[-32768.0,-32768.0] -32768.0 -32768.0 -32768.0 SIGNED_16BITS

I’ve also noticed that if I manually put in the min and max value for the geotiff when publishing it in GeoServer, those values show up at the REST endpoint above.

Shouldn’t GeoServer calculate this automatically when uploading the raster?

Have I missed something, is there any other way of getting raster statistics in GeoServer?

Regards,

Anton

Find and fix application performance issues faster with Applications Manager
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–

==
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 Anton,

Max and min values are not currently calculated. We made a proposal for an implementation of this feature:

https://github.com/geoserver/geoserver/wiki/GSIP-140

but we are not implementing it on the short term.

Simone Giannecchini mentioned some WPS existing process to get max and min values. I have found the following processes, but I am not sure what they are calculating exactly:

https://github.com/geoserver/geoserver/blob/master/src/extension/wps/wps-core/src/main/java/org/geoserver/wps/gs/ClassificationStatsPPIO.java
https://github.com/geotools/geotools/blob/master/modules/unsupported/process-raster/src/main/java/org/geotools/process/raster/CoverageClassStats.java

Cheers,

César

···

On 4 May 2016 at 10:07, Andrea Aime <andrea.aime@anonymised.com> wrote:

Hi Anton,
you did not miss anything.
There was a discussion on the topic in the last few months in geoserver-devel,
but I don’t think it moved past the talking stage, have a look at the list archives

Cheers
Andrea

Find and fix application performance issues faster with Applications Manager
Applications Manager provides deep performance insights into multiple tiers of
your business applications. It resolves application problems quickly and
reduces your MTTR. Get your free trial!
https://ad.doubleclick.net/ddm/clk/302982198;130105516;z

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

–

On Wed, May 4, 2016 at 9:40 AM, Anton Lundkvist <antonlundkvist@anonymised.com> wrote:

Hi,

I want to get the statistics (min, max, mean, and stdv) of a raster in GeoServer.

I have looked at WPS and REST but no luck. The WPS does not seem to have this process implemented. The REST API should be able to give me this answer at the following endpoint:

http://localhost:8080/geoserver/rest/workspaces//coveragestores//coverages/.xml

When looking at the xml at the above URL it seems that the max and min values are not calculated but shows some kind of default values (see range tag below):

GRAY_INDEX GridSampleDimension[-32768.0,-32768.0] -32768.0 -32768.0 -32768.0 SIGNED_16BITS

I’ve also noticed that if I manually put in the min and max value for the geotiff when publishing it in GeoServer, those values show up at the REST endpoint above.

Shouldn’t GeoServer calculate this automatically when uploading the raster?

Have I missed something, is there any other way of getting raster statistics in GeoServer?

Regards,

Anton

Find and fix application performance issues faster with Applications Manager
Applications Manager provides deep performance insights into multiple tiers of
your business applications. It resolves application problems quickly and
reduces your MTTR. Get your free trial!
https://ad.doubleclick.net/ddm/clk/302982198;130105516;z

Geoserver-users mailing list
Geoserver-users@lists.sourceforge.net
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–

==
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.

César Martínez Izquierdo
GIS developer

SCOLAB: http://www.scolab.es

4

Thanks Cesar an Andrea! I’ll check the wps processes you sent me. I did implement my own wps which works so in last case I’ll use that one.

It seems that wcs functionality is not really prioritised in geoserver right now. Maybe it is not requested by that many users either?

Thanks for a great community!

Anton

···

On 4 May 2016 at 10:07, Andrea Aime <andrea.aime@anonymised.com> wrote:

Hi Anton,
you did not miss anything.
There was a discussion on the topic in the last few months in geoserver-devel,
but I don’t think it moved past the talking stage, have a look at the list archives

Cheers
Andrea

Find and fix application performance issues faster with Applications Manager
Applications Manager provides deep performance insights into multiple tiers of
your business applications. It resolves application problems quickly and
reduces your MTTR. Get your free trial!
https://ad.doubleclick.net/ddm/clk/302982198;130105516;z

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

–

César Martínez Izquierdo
GIS developer

SCOLAB: http://www.scolab.es

On Wed, May 4, 2016 at 9:40 AM, Anton Lundkvist <antonlundkvist@anonymised.com> wrote:

Hi,

I want to get the statistics (min, max, mean, and stdv) of a raster in GeoServer.

I have looked at WPS and REST but no luck. The WPS does not seem to have this process implemented. The REST API should be able to give me this answer at the following endpoint:

http://localhost:8080/geoserver/rest/workspaces//coveragestores//coverages/.xml

When looking at the xml at the above URL it seems that the max and min values are not calculated but shows some kind of default values (see range tag below):

GRAY_INDEX GridSampleDimension[-32768.0,-32768.0] -32768.0 -32768.0 -32768.0 SIGNED_16BITS

I’ve also noticed that if I manually put in the min and max value for the geotiff when publishing it in GeoServer, those values show up at the REST endpoint above.

Shouldn’t GeoServer calculate this automatically when uploading the raster?

Have I missed something, is there any other way of getting raster statistics in GeoServer?

Regards,

Anton

Find and fix application performance issues faster with Applications Manager
Applications Manager provides deep performance insights into multiple tiers of
your business applications. It resolves application problems quickly and
reduces your MTTR. Get your free trial!
https://ad.doubleclick.net/ddm/clk/302982198;130105516;z

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.

5

On Wed, May 4, 2016 at 8:33 PM, Anton Lundkvist <antonlundkvist@anonymised.com>
wrote:

Thanks Cesar an Andrea! I'll check the wps processes you sent me. I did
implement my own wps which works so in last case I'll use that one.

It seems that wcs functionality is not really prioritised in geoserver
right now. Maybe it is not requested by that many users either?

There is no such a thing as prioritizing I'm afraid, that would imply
someone has a pot of money that can be
spent in one way, or the other, and can thus decide what's more important
to work on. It's an approach suitable
for someone selling software, piling up money, and then deciding what to
build for the N+1 version... it's not us.

What happens is that people contribute directly what they need, or ask some
commercial provider to implement it for them.

You are right that WCS is less often on the menu than other options... but
it has nothing to do with
what the core devs want, really...

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 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.

-------------------------------------------------------

6

Ciao Cesar,
the WPS processes to look at are the RasterZonalStatistics ones in
GeoTools, here you have one:

https://github.com/geotools/geotools/blob/master/modules/unsupported/process-raster/src/main/java/org/geotools/process/raster/RasterZonalStatistics2.java

Many of the params have default.

@Anton this would need to be wrapped as a GeoServer process (becoming
aware of the concept of layer and so on) to run in GeoServer.
Admittely not extremely simple for the uninitated but not even a
tremendous amount of work.

Regards,
Simone Giannecchini

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

Ing. Simone Giannecchini
@simogeo
Founder/Director

GeoSolutions S.A.S.
Via di Montramito 3/A
55054 Massarosa (LU)
Italy
phone: +39 0584 962313
fax: +39 0584 1660272
mob: +39 333 8128928

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.

On Wed, May 4, 2016 at 10:43 AM, César Martínez Izquierdo
<cesar.izq@anonymised.com> wrote:

Hi Anton,

Max and min values are not currently calculated. We made a proposal for an
implementation of this feature:
https://github.com/geoserver/geoserver/wiki/GSIP-140

but we are not implementing it on the short term.

Simone Giannecchini mentioned some WPS existing process to get max and min
values. I have found the following processes, but I am not sure what they
are calculating exactly:

https://github.com/geoserver/geoserver/blob/master/src/extension/wps/wps-core/src/main/java/org/geoserver/wps/gs/ClassificationStatsPPIO.java
https://github.com/geotools/geotools/blob/master/modules/unsupported/process-raster/src/main/java/org/geotools/process/raster/CoverageClassStats.java

Cheers,

César

On 4 May 2016 at 10:07, Andrea Aime <andrea.aime@anonymised.com> wrote:

Hi Anton,
you did not miss anything.
There was a discussion on the topic in the last few months in
geoserver-devel,
but I don't think it moved past the talking stage, have a look at the list
archives

Cheers
Andrea

On Wed, May 4, 2016 at 9:40 AM, Anton Lundkvist <antonlundkvist@anonymised.com>
wrote:

Hi,

I want to get the statistics (min, max, mean, and stdv) of a raster in
GeoServer.

I have looked at WPS and REST but no luck. The WPS does not seem to have
this process implemented. The REST API should be able to give me this answer
at the following endpoint:

http://localhost:8080/geoserver/rest/workspaces/&lt;workspaceName&gt;/coveragestores/&lt;storeName&gt;/coverages/&lt;coverageName&gt;\.xml

When looking at the xml at the above URL it seems that the max and min
values are not calculated but shows some kind of default values (see range
tag below):

<dimensions>
   <coverageDimension>
      <name>GRAY_INDEX</name>
      <description>GridSampleDimension[-32768.0,-32768.0]</description>
       <range>
          <min>-32768.0</min>
           <max>-32768.0</max>
        </range>
         <nullValues>
             <double>-32768.0</double>
          </nullValues>
          <dimensionType>
               <name>SIGNED_16BITS</name>
           </dimensionType>
    </coverageDimension>
</dimensions>

I've also noticed that if I manually put in the min and max value for the
geotiff when publishing it in GeoServer, those values show up at the REST
endpoint above.

Shouldn't GeoServer calculate this automatically when uploading the
raster?

Have I missed something, is there any other way of getting raster
statistics in GeoServer?

Regards,

Anton

------------------------------------------------------------------------------
Find and fix application performance issues faster with Applications
Manager
Applications Manager provides deep performance insights into multiple
tiers of
your business applications. It resolves application problems quickly and
reduces your MTTR. Get your free trial!
https://ad.doubleclick.net/ddm/clk/302982198;130105516;z
_______________________________________________
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.

-------------------------------------------------------

------------------------------------------------------------------------------
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Manager
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tiers of
your business applications. It resolves application problems quickly and
reduces your MTTR. Get your free trial!
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_______________________________________________
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--
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
   César Martínez Izquierdo
   GIS developer
   - - - - - - - - - - - - - - - - - - - -
   SCOLAB: http://www.scolab.es
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

------------------------------------------------------------------------------
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of
your business applications. It resolves application problems quickly and
reduces your MTTR. Get your free trial!
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_______________________________________________
Geoserver-users mailing list
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7

Thanks for the clarifications and the wps you mentioned. I’ll have a look at it.

All the best,

Anton

Den 4 maj 2016 21:23 skrev “Simone Giannecchini” <simone.giannecchini@anonymised.com>:

Ciao Cesar,
the WPS processes to look at are the RasterZonalStatistics ones in
GeoTools, here you have one:

https://github.com/geotools/geotools/blob/master/modules/unsupported/process-raster/src/main/java/org/geotools/process/raster/RasterZonalStatistics2.java

Many of the params have default.

@Anton this would need to be wrapped as a GeoServer process (becoming
aware of the concept of layer and so on) to run in GeoServer.
Admittely not extremely simple for the uninitated but not even a
tremendous amount of work.

Regards,
Simone Giannecchini

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

Ing. Simone Giannecchini
@simogeo
Founder/Director

GeoSolutions S.A.S.
Via di Montramito 3/A
55054 Massarosa (LU)
Italy
phone: +39 0584 962313
fax: +39 0584 1660272
mob: +39 333 8128928

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

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On Wed, May 4, 2016 at 10:43 AM, César Martínez Izquierdo
<cesar.izq@anonymised.com> wrote:

Hi Anton,

Max and min values are not currently calculated. We made a proposal for an
implementation of this feature:
https://github.com/geoserver/geoserver/wiki/GSIP-140

but we are not implementing it on the short term.

Simone Giannecchini mentioned some WPS existing process to get max and min
values. I have found the following processes, but I am not sure what they
are calculating exactly:

https://github.com/geoserver/geoserver/blob/master/src/extension/wps/wps-core/src/main/java/org/geoserver/wps/gs/ClassificationStatsPPIO.java
https://github.com/geotools/geotools/blob/master/modules/unsupported/process-raster/src/main/java/org/geotools/process/raster/CoverageClassStats.java

Cheers,

César

On 4 May 2016 at 10:07, Andrea Aime <andrea.aime@anonymised.com> wrote:

Hi Anton,
you did not miss anything.
There was a discussion on the topic in the last few months in
geoserver-devel,
but I don’t think it moved past the talking stage, have a look at the list
archives

Cheers
Andrea

On Wed, May 4, 2016 at 9:40 AM, Anton Lundkvist <antonlundkvist@anonymised.com>
wrote:

Hi,

I want to get the statistics (min, max, mean, and stdv) of a raster in
GeoServer.

I have looked at WPS and REST but no luck. The WPS does not seem to have
this process implemented. The REST API should be able to give me this answer
at the following endpoint:

http://localhost:8080/geoserver/rest/workspaces//coveragestores//coverages/.xml

When looking at the xml at the above URL it seems that the max and min
values are not calculated but shows some kind of default values (see range
tag below):

GRAY_INDEX GridSampleDimension[-32768.0,-32768.0] -32768.0 -32768.0 -32768.0 SIGNED_16BITS

I’ve also noticed that if I manually put in the min and max value for the
geotiff when publishing it in GeoServer, those values show up at the REST
endpoint above.

Shouldn’t GeoServer calculate this automatically when uploading the
raster?

Have I missed something, is there any other way of getting raster
statistics in GeoServer?

Regards,

Anton

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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.

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–

César Martínez Izquierdo
GIS developer

SCOLAB: http://www.scolab.es

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