[udig-devel] GDAL and JAI

[Graham Davis <gdavis@xxxxxxxxxxxxxxx>]

Hi,

I'm looking into making a small module in uDig for image manipulation.  
Basically my client wants to take an aerial photo and place it overtop 
of a satellite base layer.  They want to be able to manually manipulate 
this photo and visually fit it onto the correct spot of the map.  The 
manipulation they want to be able to achieve includes shrinking/growing 
the image, rotating it and morphing it to align correctly.  Ideally this 
would be done in real-time with the user manipulating  the image with 
their mouse and maybe some numerical input.  Once the user is satisfied 
with their approximate placement, they can "lock it in" at which point I 
will save the resulting image and its coordinates as a geotiff.

I am currently looking at JAI and GDAL to see if these sorts of image 
manipulation functions are available.  I haven't used either library 
very extensively, so it is pretty new to me.  The GDAL documentation 
seems to be pretty light in general (at least for Java and GeoTools).  
I've only found these resources:

- http://docs.codehaus.org/display/GEOTOOLS/ImageIO-EXT+GDAL
- http://trac.osgeo.org/gdal/wiki/GdalOgrInJava

Does anyone know of other helpful resources that I could use for this 
project?  Are there any uDig modules that currently do anything like 
this, with example code I could look at?  Or perhaps someone has some 
suggestions for how I might approach this so that it fits nicely with 
current uDig designs?  If this functionality sounds useful to others, 
I'm all for trying to make this module "official".  Thanks,

--
Graham Davis
Refractions Research Inc.
gdavis@xxxxxxxxxxxxxxx