With the new 2012 map that is out
and the links for some of the old data , now dead .
this needs to be revisited
from the 2006 Rad. Cal. map
http://www.ngdc.noaa.gov/dmsp/download_radcal.html
-- a quick "back of the envelope" ---
the 32bit float image
"F16_20051128_20061224.cloud2.light1.marginal0.fg_15_35_55.full_swath.line_screened.shiftx2y2.op_blended.avg_vis.tif"
has a range from 0 to 6030.7 ( i am using 6031)
-- center of the image, just above the cursor
move this into UCHAR ( divide by 23.65 Approx. )
And downtown NewYork has a max value of 76
--- below a very OVER exaggerated image
then the normal one ( for the 2006 Cal. )
-- the EO 2012 night map ( New York )
and moved so downtown is 76 and not 255
just a one point quick look
other cities might not be the same
So the lights are rather "dark"
The"normalized" and exaggerated map
http://earthobservatory.nasa.gov/Featur ... /page3.php
dose make a nice" wallpaper" ( though the background is WAY to blue )
This is where "t00fri" and i differ
(A good difference of opinion. )
---- edited - new map ------
---- using the 2006 cal. as a "burn" mask -----
-- with NY set to about "160 to 190 average" in the map i am working on
-- screen capture --
screenshots
