Hi Marc,
nope... The ImageMosaic is "simply" an image collector which returns back a
mosaic of data from a set of available rasters. You can perform filtering
on some area/dimensions/attributes; you can flat all the pieces of the
mosaic to a single image or stack them into different bands but you can't
get math computations results (as sum, average, std_dev) from them.
A thing which may work is playing with renderingTransformations (which are
operations performed on the fly on the data, configured through a style
applied to the layer) to do what you need.
I'm wondering if using a STACK mergeBehaviour (which stacks different
pieces of the mosaic to different bands) and applying a
renderingTransformation doing sum of the bands will do the trick. I'm also
wondering if we need to know in advance the number of output bands in order
to setup the required computation.
More info or samples on renderingTransformation are here:
http://docs.geoserver.org/stable/en/user/styling/sld-extensions/rendering-transform.html
http://geoserver.geo-solutions.it/edu/en/wps/rendering_tx.html#point-extraction
The latest one also contains a "wind arrows" paragraph where it uses a
style containing ogc:Add operation which could be used to compose additions
of bands.
Hopefully, other developers may also add their feedbacks on the topic.
Cheers,
Daniele
==
GeoServer Professional Services from the experts! Visit
http://goo.gl/NWWaa2 for more information.
==
Ing. Daniele Romagnoli
Senior Software Engineer
GeoSolutions S.A.S.
Via Poggio alle Viti 1187
55054 Massarosa (LU)
Italy
phone: +39 0584 962313
fax: +39 0584 1660272
http://www.geo-solutions.it
http://twitter.com/geosolutions_it
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On Mon, Mar 2, 2015 at 11:49 AM, Marc Schenke <[email protected]> wrote:
> Hello Daniele,
>
> the GeoTiffs contain real measurement of rain in milimeters per m² per
> hour. Basically every cell in the raster contains floating point numbers. I
> have hoped to receive an accumulated raster as response, when querying with
> a time interval. The task is to display the amount of rain for a user
> defined time interval. For example if the interval encloses ten files, the
> result should contain the accumulated rain amount for every cell from the
> matching files.
>
> The client is a web interface based on Open Layers 2.
>
> Flattening in the sense that all files are combined into a single
> image/band is what i am looking for. How are cell values ( colors or
> measurements ) computed when two images overlap each other?
>
> Cheers,
> Marc
>
> ------------------------------
> From: [email protected]
> Date: Mon, 2 Mar 2015 11:06:19 +0100
>
> Subject: Re: [Geoserver-users] Image Mosaic Plugin composing behaviour
> To: [email protected]
> CC: [email protected]
>
> Hi Marc,
> In that case, the "FLAT" merge behaviour does what its name suggests:
> It takes all the matching inputs and FLAT them all together to a single
> image.
>
> Next questions then:
> - Which datatypes of images are you merging? (Byte RGB/Byte Gray/Real
> measurements (temperature/humidity/...)/...?)
> - Since all the input images cover the same area, what kind of visual
> output are you expecting from a set of them?
> I mean... if you are mosaicking images covering different locations, you
> may want to get back a single image made of all those scattered pieces. In
> this case, you will populate instead the same geographic area with data
> coming from different times. Are you looking for a multibands image where
> each band is made of data coming from a different time of the same region?
> Or are you looking instead for a 3D output (lat/lon+time) to be used into
> another client? (I'm thinking about setting a NetCDF output with a time
> dimension to be view in Panoply, ToolsUI, ...).
>
> Please, let us know what is your intended usage.
> Cheers,
> Daniele
>
>
>
> ==
> GeoServer Professional Services from the experts! Visit
> http://goo.gl/NWWaa2 for more information.
> ==
>
> Ing. Daniele Romagnoli
> Senior Software Engineer
>
> GeoSolutions S.A.S.
> Via Poggio alle Viti 1187
> 55054 Massarosa (LU)
> Italy
> phone: +39 0584 962313
> fax: +39 0584 1660272
>
> 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 Mon, Mar 2, 2015 at 10:37 AM, Marc Schenke <[email protected]>
> wrote:
>
> Hi Daniele,
>
> the only difference is the validity time, all raster files cover the exact
> same area. However after checking the corresponding geometry column i
> noticed that sometimes the bounding box declaration varies. It is always in
> the same geographic location (when i look at them on the map) but the order
> of points within the polygon differs. I am not sure if this is an issue,
> since it is always the same set of coordinates.
>
> Cheers,
> Marc
>
> ------------------------------
> From: [email protected]
> Date: Mon, 2 Mar 2015 10:17:04 +0100
> Subject: Re: [Geoserver-users] Image Mosaic Plugin composing behaviour
> To: [email protected]
> CC: [email protected]
>
>
> Hi Marc,
> quick question:
> are these GeoTiffs scattered "around the world" or are all of them
> covering the same exact Bounding Box instead, where the only difference is
> the 7 minutes validity time?
>
> Cheers,
> Daniele
>
>
>
>
>
> ==
> GeoServer Professional Services from the experts! Visit
> http://goo.gl/NWWaa2 for more information.
> ==
>
> Ing. Daniele Romagnoli
> Senior Software Engineer
>
> GeoSolutions S.A.S.
> Via Poggio alle Viti 1187
> 55054 Massarosa (LU)
> Italy
> phone: +39 0584 962313
> fax: +39 0584 1660272
>
> 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 Mon, Mar 2, 2015 at 9:13 AM, Marc Schenke <[email protected]> wrote:
>
> Hello,
>
> i have a question concerning the raster data merge behaviour of the image
> mosaic plugin in combination with temporal wms requests. Here's my setup:
>
>
> - Geoserver 2.6.2 running in a Tomcat 7 container on ubuntu 12 server
> - configured image mosaic plugin with geotiff's and postgis, as
> suggested in the tutorial
> - geotiffs are added every 7 minutes and are valid within this
> interval (i have a datefrom and dateto timestamp in the database)
> - Layer is configured to use time dimension with presentation set to
> "continuous interval" and default value "Use the biggest domain value"
> - Merge behaviour is set to "FLAT"
>
>
>
> The time support docs say that i can plot several measurements (in this
> case a raster of rain amounts) over a certain time window: "you might have
> a single dataset with weather observations collected over time and choose
> to plot a single day’s worth of observations."
> http://docs.geoserver.org/latest/en/user/services/wms/time.html
>
>
> So i expected geoserver to somehow compose a picture of several raster
> files when i query the wms for an one hour interval. Instead geoserver
> returns the first geotiff that meets the lower end time of my requested
> interval.
>
>
> Is it possible to configure the geoserver in a way, that it will
> accumulate all raster data for the requested interval within a single
> layer, or did i missunderstand the capabilities of time support and the
> image mosaic plugin? And are there other Merge behaviours than FLAT?
>
> Thanks in advance,
>
> Marc Schenke
>
>
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