[gdal-dev] Combining multiple rasters using GDAL Warp API

[Even Rouault]

Damian,

> VRT looks a possibility. The VRT format tutorial shows how to do this
> programatically:
> 
> http://www.gdal.org/gdal_vrttut.html#gdal_vrttut_creation
> 

If you use GDAL 2.1, you can also use GDALBuildVRT() : 
http://gdal.org/gdal__utils_8h.html#a057aaea8b0ed0476809a781ffa377ea4

Or GDALWarp() : 
http://gdal.org/gdal__utils_8h.html#ab2094d5332364d63e0851dcb12398469

Regarding the low level warp API, the multi input dataset support is basically 
done by calling it as many times as you have source datasets.

Even

> 
> On 25 July 2016 at 16:28, Daniele Romagnoli <
> 
> daniele.romagnoli at geo-solutions.it> wrote:
> > Hi Damian,
> > I'm probably going off-topic but, did you consider setting up an
> > intermediate VRT built on top of your sources?
> > 
> > Cheers,
> > Daniele
> > 
> > On Mon, Jul 25, 2016 at 4:53 PM, Damian Dixon <damian.dixon at gmail.com>
> > 
> > wrote:
> >> Hi,
> >> 
> >> I would like to combine multiple adjacent or overlapping rasters.
> >> 
> >> They will all be in the same projection, image format and the output
> >> projection will be the same as the source data.
> >> 
> >> I believe that this is possible using the command line utility gdalwarp
> >> as it can take multiple source files.
> >> 
> >> I am wondering how to do this through the GDAL Warp API as you can only
> >> specify a single source file:
> >> 
> >> psWarpOptions->hSrcDS
> >> <http://www.gdal.org/structGDALWarpOptions.html#a65f68e1cf7ca641c5d0a9376
> >> 2d0416d5> = hSrcDS;
> >> 
> >> 
> >> according to the tutorial.
> >> 
> >> 
> >> Any hints or suggestions on how to pass multiple files to the Warp API
> >> would be very helpful.
> >> 
> >> Thanks
> >> Damian
> >> 
> >> _______________________________________________
> >> gdal-dev mailing list
> >> gdal-dev at lists.osgeo.org
> >> http://lists.osgeo.org/mailman/listinfo/gdal-dev
> > 
> > --
> > ==
> > GeoServer Professional Services from the experts! Visit
> > http://goo.gl/it488V for more information.
> > ==
> > 
> > Ing. Daniele Romagnoli
> > Senior Software Engineer
> > 
> > GeoSolutions S.A.S.
> > Via di Montramito 3/A
> > 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.

-- 
Spatialys - Geospatial professional services
http://www.spatialys.com