[GRASS-dev] GRASS GIS Map Display

[Michael Barton]

Good to know. Thanks. I've never seen it for other geospatial data entry, but good to know that GDAL can read such a file.

Michael
____________________
C. Michael Barton
Director, Center for Social Dynamics & Complexity 
Professor of Anthropology, School of Human Evolution & Social Change
Arizona State University

voice: 	480-965-6262 (SHESC), 480-727-9746 (CSDC)
fax:          480-965-7671 (SHESC),  480-727-0709 (CSDC)
www: http://www.public.asu.edu/~cmbarton, http://csdc.asu.edu











On Aug 13, 2011, at 8:52 PM, Hamish wrote:

> Michael wrote:
>> Unless there is some kind of geocoded version of PNG's (I don't
>> know of any), the PNG would not be georeferenced and hence not
>> useable in any way for the GIS without some kind of
>> transformation.
> 
> for the record, you can create a "worldfile" for a PNG the same
> as for a plain TIFF image, and GDAL will pick it up. It needs to
> be named the same as the image but with a .pgw extension.
>  http://gdal.org/frmt_various.html#PNG
> 
> I'm not sure if anything other than GDAL-based things would
> respect that though, or if this trick helps for Sudeep's
> question or not.
> 
> (GDAL's virtual-raster format is another wonderful cpu-saving
> device worth mentioning btw)
>  http://www.gdal.org/gdal_vrttut.html
> 
> 
> Hamish
>