Hi Roland,
It looks like the US National Geological Survey is playing with their data again.
http://nationalmap.gov/data_delivery/naip.html
The delivery format is changing again, rationalizing I suppose, to a single JPG2000 (JP2) format. The NGS will supply filters and scripts to assist GIS customers.
John
New format yet again coming up for DEM downloads from NGS.
Re: New format yet again coming up for DEM downloads from NG
Question is: Will it affect us? I have read a similar National Map announcement in spring, addressing ortho-imagery in general, and also featuring JPEG2000. It's on my list but I decided not to pursue it for TransDEM 2.4 as National Map ortho-images haven't seen wide-spread use for Trainz route building so far. They do have some good stuff there, high-res crystal clear images, that's for sure.
JPEG2000 is another of those obscure formats, utterly complicated for the few things we need. The only point I can see is that it has a standardized way of embedding georeferencing into the file which ordinary JPEG does not. JPEG offers EXIF and various other extensions but apparently none that matches USGS National Map ideas.
JPEG2000 is another of those obscure formats, utterly complicated for the few things we need. The only point I can see is that it has a standardized way of embedding georeferencing into the file which ordinary JPEG does not. JPEG offers EXIF and various other extensions but apparently none that matches USGS National Map ideas.