Earthnight -2
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Author:  John Van Vliet [ Thu, 19-12-13, 8:33 GMT ]
Post subject:  Earthnight -2

new thread for this one
i am uploading to my Google drive the 64K 32 bit isis cub file
in 4 parts ( NW,SW,NE,SE )
histogram matched to the 2006 radiance calibrated
--- Black and white image !!! ---

some shots in "Qview" ( qview normalizes and converts to 8 bit for viewing so ...)
Image Image Image

---- the g-drive link
all 4 add up to 1.3 gig ZIPPED !!!!
running "automos" on the mapped cubes will make a 8 gig 64K 32 bit floating point image

do to how compression works the North East quad is the largest and the South west is the smallest
the below link is no longer working
those that need it have it

NE: 755 Meg ... sp=sharing
NW: 365 Meg ... sp=sharing
SE: 122 Meg ... sp=sharing
SW: 108 Meg ... sp=sharing

Author:  John Van Vliet [ Wed, 08-01-14, 21:56 GMT ]
Post subject:  Re: Earthnight -2

the colorized 64 k map
As the above this one is also in 4 parts
and is in ppm format

2k previews of the 4 32k parts ( only resized ! i did not normalize )
----------------NorthEast ---------------------------------------------NorthWest ------------------------------------------------SouthEast --------------------------------------------------SouthWest
Image Image Image Image

the google drive zip files ... sp=sharing

a VT add on will be coming to the ML in a few days
but here is the original for any one wanting to use it
cc-by-sa applies

a quick old VS new
level4 tx_8_4.png 512x512 vt tile

Author:  fenerit [ Fri, 10-01-14, 5:40 GMT ]
Post subject:  Re: Earthnight -2

Great work, John.

Author:  t00fri [ Fri, 10-01-14, 10:53 GMT ]
Post subject:  Re: Earthnight -2

fenerit wrote:
Great work, John.

Indeed! A big step forward from the left picture above to the one on the right.


Author:  John Van Vliet [ Fri, 10-01-14, 21:25 GMT ]
Post subject:  Re: Earthnight -2

considering that the old data is 8 bit , and the new data is 32 bit .........

this is a bit new on NOAA
nightly mosaics but they are 8 bit images :wall: :wall: :wall:

Author:  scalbers [ Sun, 01-03-15, 21:21 GMT ]
Post subject:  Re: Earthnight -2

Nice maps John. Is there a lookup table somewhere to convert the count values in these maps (cub and ppm files) into radiance? I see you mentioned these are radiance calibrated.

Author:  John Van Vliet [ Sun, 01-03-15, 22:36 GMT ]
Post subject:  Re: Earthnight -2

The USGS / NOAA moved pages and files

the 32 bit VIIRS data used has moved ? someplace
the mapserver page has this folder

the updates are here ... /geotiffs/
like "d20150301_t0620483_e0630452_b17307"
they are a mix of clouded and cloud-free

but the data is VERY noisy
and the servers can be VERY SLOW ( dial up speed )

the links i posted in the first post i left in isis cub format after histogram matching
they are B&W and of limited use
those that CAN use them ,already know how to convert them to other formats
( isis3 or gdal )

the colorized are in ppm format
these open FAST in most editors

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