Thanks Hamish, Michael and Rashad . I will let know if I have some luck with this. <br><br><div class="gmail_quote">On Sun, Aug 14, 2011 at 10:14 AM, Michael Barton <span dir="ltr"><<a href="mailto:Michael.Barton@asu.edu">Michael.Barton@asu.edu</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">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.<br>
<br>
Michael<br>
____________________<br>
C. Michael Barton<br>
Director, Center for Social Dynamics & Complexity<br>
Professor of Anthropology, School of Human Evolution & Social Change<br>
Arizona State University<br>
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On Aug 13, 2011, at 8:52 PM, Hamish wrote:<br>
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> Michael wrote:<br>
>> Unless there is some kind of geocoded version of PNG's (I don't<br>
>> know of any), the PNG would not be georeferenced and hence not<br>
>> useable in any way for the GIS without some kind of<br>
>> transformation.<br>
><br>
> for the record, you can create a "worldfile" for a PNG the same<br>
> as for a plain TIFF image, and GDAL will pick it up. It needs to<br>
> be named the same as the image but with a .pgw extension.<br>
> <a href="http://gdal.org/frmt_various.html#PNG" target="_blank">http://gdal.org/frmt_various.html#PNG</a><br>
><br>
> I'm not sure if anything other than GDAL-based things would<br>
> respect that though, or if this trick helps for Sudeep's<br>
> question or not.<br>
><br>
> (GDAL's virtual-raster format is another wonderful cpu-saving<br>
> device worth mentioning btw)<br>
> <a href="http://www.gdal.org/gdal_vrttut.html" target="_blank">http://www.gdal.org/gdal_vrttut.html</a><br>
><br>
><br>
> Hamish<br>
><br>
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