[Gvsig_english] gvSIG Mobile, ECW, GDAlLtip

[Juan Lucas Dominguez Rubio]

Hello all:
 
If you have a raster file (JPG, PNG, etc) with a georeference file (WLD, JGW, etc) and you want to use it in gvSIG Mobile, you will probably have to convert it to ECW. In that case, it's better to convert it in two steps, so you dont lose the rotation information:

gdalwarp image.jpg image.tif
gdal_translate -of ecw image.tif image.ecw

(the georeference file image.jgw or image.wld file must be in the same folder)

See an example here:

https://correo.prodevelop.es/descarga/mobile/gdal/raster_to_ecw.jpg

gdalwarp and gdal_translate utilities are part of FWTools http://fwtools.maptools.org

Regards,
 
Juan Lucas Domínguez Rubio
Prodevelop SL, Valencia (España)
Tlf.: 96.351.06.12 -- Fax: 96.351.09.68
http://www.prodevelop.es <http://www.prodevelop.es/> 

________________________________

De: gvsig_internacional-bounces at runas.cap.gva.es en nombre de Mithoefer, Klaus
Enviado el: jue 18/12/2008 10:36
Para: Users and Developers mailing list
Asunto: RE: [Gvsig_english] FW: gvSIG mobile: image support "Couldnotcreatelayer"



Hello Juan,

 

Thanks for the tip! It works as ECW. The Jpg was too big.

 

Best regards,

 

Klaus

 

________________________________

From: gvsig_internacional-bounces at runas.cap.gva.es [mailto:gvsig_internacional-bounces at runas.cap.gva.es] On Behalf Of Juan Lucas Dominguez Rubio
Sent: Thursday, December 18, 2008 11:13
To: Users and Developers mailing list; gvsig_internacional at runas.cap.gva.es
Subject: RE: [Gvsig_english] FW: gvSIG mobile: image support "Could notcreatelayer"

 

Hello, Klaus:

 

gvSIG Mobile supports JPG, PNG and GIF (all of them with a 6-parameter world file) and ECW. For JPG, PNG and GIF, you can only load small images (< 500,000 pixels) because these formats need a lot of physical memory which is not available in a pocket PC/smartphone. Your images are probably larger than that, so you will have to use the gdal_translate utility available from http://fwtools.maptools.org <http://fwtools.maptools.org/>  :

 

gdal_translate -of ecw image.jpg image.ecw
(the file image.wld or image.jpw must be in the same folder)

 

Regards,

 

Juan Lucas Domínguez Rubio
Prodevelop SL, Valencia (España)
Tlf.: 96.351.06.12 -- Fax: 96.351.09.68
http://www.prodevelop.es <http://www.prodevelop.es/> 

 

________________________________

De: gvsig_internacional-bounces at runas.cap.gva.es en nombre de Mithoefer, Klaus
Enviado el: jue 18/12/2008 7:27
Para: gvsig_internacional at runas.cap.gva.es
Asunto: [Gvsig_english] FW: gvSIG mobile: image support "Could not createlayer"

Dear All,

I just try gvSIG Mobile and have problems getting an image layer loaded. I tried jpeg and img, images I used in gvSIG desktop. The Jpeg is correctly imported to my pocket pc, I can open it in a picture viewer. But in gvSIG mobile I get the message "Could not create layer". Does anybody have a solution for that?

Thanks and best regards,

Klaus

Klaus Mithöfer
Geographic Information Systems (GIS) Officer
icipe - International Centre of Insect Physiology and Ecology
P.O. Box 30772 - 00100
Nairobi, Kenya
Phone: +254-20-8632000, Extn. 2147
Fax: +254-20-8632001/2
Mobile: +254-724-308404
E-Mail: kmithoefer at icipe.org
web: www.icipe.org


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This position is supported by German development cooperation //
Centre for international Migration and Development - http://www.cimonline.de/en/index.asp

Klaus.mithoefer at cimonline.de




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