[Gvsig_english] Raster support on GVSIG

Wed Feb 10 15:19:40 CET 2010

Hello,
The JPGW file mentioned by Simon is usually called 'world file'. Detailed description here:

http://en.wikipedia.org/wiki/World_file

It can be found with many different extensions: JPW, JGW (I think), TFW, WLD, etc.
I usually use the .WLD extension for all image formats (BMP, JPG, PNG, etc), which I think is recognized by all the software I have used so far. For example if you have a file.jpg and file.wld, both gvSIG and Gdal ( http://fwtools.maptools.org ) will recognize and use it.

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 listserv.gva.es en nombre de Simon Cropper (Botanicus Australia Pty Ltd)
Enviado el: mié 10/02/2010 14:39
Para: Users and Developers mailing list
Asunto: Re: [Gvsig_english] Raster support on GVSIG

Edson,

The latest version of gvSIG is 1.9. Spanish manuals are available at
http://www.gvsig.org <http://www.gvsig.org/>  and English versions are being prepared.

The manual for the earlier version, version 1.1.2, is available at
http://www.gvsig.org/web/docusr/manuales-en and discusses the basic
concepts.

gvSIG can display and manipulate jpeg, jpg, gif, png, bmp and svg (+
more). Although some require header files containing georeferencing data
to be displayed correctly.

gvSIG can also connect to GeoDB, WCS, ArcIMS, WMS, Annotation and WFS
internet services that can contain image data.

Usually JPG or PNG files require header files that contain the
coordinates of the upper left corner and the pixel size. A typical
example can be seen below.

For a file called "JPG_Image.jpg" you would have a corresponding file
called "JPG_Image.jpgw". gvSIG also creates an "aux.xml" and "rmf" file
with the same data.

The content of the different files look like this...

*JPGW*

0.3376811594201211
0.0
0.0
-0.33768115942109755
341082.7
5814636.992753624

*AUX.XML*

<PAMDataset>
<GeoTransform> 3.4108270000000001e+005, 3.3768115942012111e-001,
0.0000000000000000e+000, 5.8146369927536240e+006,
0.0000000000000000e+000,-3.3768115942109755e-001</GeoTransform>
<Metadata domain="IMAGE_STRUCTURE">
<MDI key="INTERLEAVE">PIXEL</MDI>
<MDI key="COMPRESSION">JPEG</MDI>
</Metadata>
<PAMRasterBand band="1">
<Metadata domain="IMAGE_STRUCTURE">
<MDI key="COMPRESSION">JPEG</MDI>
</Metadata>
</PAMRasterBand>
<PAMRasterBand band="2">
<Metadata domain="IMAGE_STRUCTURE">
<MDI key="COMPRESSION">JPEG</MDI>
</Metadata>
</PAMRasterBand>
<PAMRasterBand band="3">
<Metadata domain="IMAGE_STRUCTURE">
<MDI key="COMPRESSION">JPEG</MDI>
</Metadata>
</PAMRasterBand>
</PAMDataset>

*RMF*

<?xml version="1.0" encoding="ISO-8859-15"?>
<RasterMetaFile>
<FLyrGeoRaster>
<Extent>
<X>341082.7</X>
<Y>5814636.992753624</Y>
<RotationX>0.0</RotationX>
<RotationY>0.0</RotationY>
<PixelSizeX>0.3376811594201211</PixelSizeX>
<PixelSizeY>-0.33768115942109755</PixelSizeY>
<Width>0.0</Width>
<Height>0.0</Height>
</Extent>
<Dimension>
<ImagePxWidth>138.0</ImagePxWidth>
<ImagePxHeight>127.0</ImagePxHeight>
</Dimension>
</FLyrGeoRaster>
</RasterMetaFile>

Cheers Simon

Simon Cropper
Botanicus Australia Pty Ltd
PO Box 160, Sunshine, Victoria 3020.
P: 9311 5822. M: 041 830 3437.
mailto: scropper at botanicusaustralia.com.au
<mailto:scropper at botanicusaustralia.com.au>
web: www.botanicusaustralia.com.au <http://www.botanicusaustralia.com.au <http://www.botanicusaustralia.com.au/> >

On 10/02/2010 11:22 PM, Edson Campos da Cunha wrote:
>
> Hi volks,
>
> I have just started working with GVSIG on the last few days.
>
> I need to display georeferenced images on GVSIG. Is there any
> reference documentation about that, preferable with some examples?
>
> A coworker on my job tested successfully image displaying in GVSIG
> with ECW files. The problem is that I must generate the images with
> GeoMedia WebMap and it does not support ECW exporting. It exports to
> CGM, JPG, PNG and SVG. My doubt precisely is: what kinds of additional
> files must I use so that GVSIG can display images such as PNG or JPG
> in the correct position on the map?
>
> Any help will be appreciated
>
> Best regards,
>
> *EDSON CUNHA
> *Analista de Sistemas
>
> *Coffey Information
> *Av Afonso Pena 3924 conj 206 - Bairro Cruzeiro
> Belo Horizonte - MG - Brasil - CEP 30.130-009
> T +55 31 2104 2196 F +55 31 2104 2105
> coffey.com <http://coffey.com/>
>
>
> _______________________________________________
> Gvsig_internacional mailing list
> Gvsig_internacional at listserv.gva.es
> http://listserv.gva.es/cgi-bin/mailman/listinfo/gvsig_internacional
>   
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