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
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==
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Senior Software Engineer
GeoSolutions S.A.S.
Via Poggio alle Viti 1187
55054 Massarosa (LU)
Italy
phone: +39 0584 962313
fax: +39 0584 1660272
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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 serverconfigured
image mosaic plugin with geotiff's and postgis, as suggested in the
tutorialgeotiffs 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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