Jonathan Gere
November 22nd 03, 12:36 AM
It just keeps getting easier:
http://onearth.jpl.nasa.gov/gis-wms.cgi?request=GetMap&width=1200&height=800&layers=us_landsat7_nopan&styles=visual&srs=EPSG:4326&format=image/jpeg&bbox=-130.295,23.1728,-60.7053,51.8272
At this site the images are already in unprojected lat/long, are
automatically clipped to lat/long limits, and are already in
attractive pseudo-natural colors. There are a few clouds here and
there. The registration has been within 400 feet or so in the few
places I checked.
For more detail at extreme zoom substitute "pan" for "nopan". Details
emerge, but colors aren't as nice (details sharpened by 15m resolution
monochrome image - colors muddied).
I'm told up to 4096 by 4096 is downloadable. Make tiles to suit your
bandwidth and patience by adjusting width, height, and bbox (lower
left - upper right; West longitude negative)
Here's Fairfield, PA (.5 deg by .5 deg) with height and width adjusted
to match 6378.245km round earth at 15m resolution (WGS-84 scale
calculations are left as an exercise to the reader):
http://onearth.jpl.nasa.gov/gis-wms.cgi?request=GetMap&width=2853&height=3711&layers=us_landsat7_nopan&styles=visual&srs=EPSG:4326&format=image/jpeg&bbox=-77.5,39.5,-77,40
Enjoy!
Jonathan Gere
http://onearth.jpl.nasa.gov/gis-wms.cgi?request=GetMap&width=1200&height=800&layers=us_landsat7_nopan&styles=visual&srs=EPSG:4326&format=image/jpeg&bbox=-130.295,23.1728,-60.7053,51.8272
At this site the images are already in unprojected lat/long, are
automatically clipped to lat/long limits, and are already in
attractive pseudo-natural colors. There are a few clouds here and
there. The registration has been within 400 feet or so in the few
places I checked.
For more detail at extreme zoom substitute "pan" for "nopan". Details
emerge, but colors aren't as nice (details sharpened by 15m resolution
monochrome image - colors muddied).
I'm told up to 4096 by 4096 is downloadable. Make tiles to suit your
bandwidth and patience by adjusting width, height, and bbox (lower
left - upper right; West longitude negative)
Here's Fairfield, PA (.5 deg by .5 deg) with height and width adjusted
to match 6378.245km round earth at 15m resolution (WGS-84 scale
calculations are left as an exercise to the reader):
http://onearth.jpl.nasa.gov/gis-wms.cgi?request=GetMap&width=2853&height=3711&layers=us_landsat7_nopan&styles=visual&srs=EPSG:4326&format=image/jpeg&bbox=-77.5,39.5,-77,40
Enjoy!
Jonathan Gere