Thanks Hamish, Michael and Rashad . I will let know if I have some luck with this.
On Sun, Aug 14, 2011 at 10:14 AM, Michael Barton <[email protected]>wrote: > 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 > > > >
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