[Gvsig_english] QUESTION gvSIG -- Image files with fast rewrites

[Jorge Gaspar Sanz Salinas]

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El 14/09/10 14:54, Simon Cropper escribió:
> Hi Rahkonen,
> 
> On Tuesday 14 September 2010 6:28:25 pm Rahkonen Jukka wrote:
> 
>> I would guess that JPEG compressed tiled tiff files might work fine.  They
>> are not necessarily understood by all software but GDAL reads and writes
>> them fine. Read http://gdal.org/frmt_gtiff.html
>> Use creation option TILED=YES, COMPRESS=JPEG and PHOTOMETRIC=YCBCR.  Fine
>> tuning can be done with JPEG_QUALITY.
> 
> Thanks for the suggestion. I will give this a try.
> 

I also recommend you (I nobody has pointed that yet) to add overviews to
your images, it will also help a lot. gvSIG has in fact an interface to
create them or if you have to do it on a big number of files you can use
the gdaladdo command inside your scripts

http://www.gdal.org/gdaladdo.html

Hope it helps.

- -- 
Jorge Gaspar Sanz Salinas
Ingeniero en Geodesia y Cartografía
http://www.prodevelop.es
tfno: +34 963 510 612

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