Hi Eric,
I have never used ASTER, but I recall from a seminar that Geoimage Australia
mentioned a 'ripple' or offset between bands with ASTER data over large parts of
Australia, but I think it was only in the order of 1 or 2 pixels. Possibly the
same thing is happening in other parts of the world? Might be best to comm
directly with the data supplier?
just a thought
Chris
eric
<[EMAIL PROTECTED]> To: [EMAIL PROTECTED]
Sent by: cc:
ermapper-l-owner@er Subject: rotation + ASTER HDF:
registration errors?
mapper.com
08/18/2002 12:00 PM
Please respond to
ermapper-l
hello list,
i fear i am asking a rather novice question, but on breaking out
ASTER
bands using the HDF wizard (I allow rotation to North), and merged in an alg.
with Landsat 5 TM and NIMA DOI10 (= SPOT 10 m. pan), I pick up about a 75 meter
(5 pixel)registration error, running NW-SE...the DOI10 and TM match nicely, and
match well with ground observations from GPS. When I compared the HDF wizard
rotated and non-rotated results, coordinate differences between pixel centers
of an ASTER file were on the order of 10-15 meters. I have not thoroughly
checked any of these numbers.
my questions are two part: 1A) has anyone had simillar
mis-registration
results when going from EOS HDF to rotated .ers raster? 1B) if so, got a
solution? 2) has anyone experienced poor georef'ing in ASTER products (these
are level 1B). my suspicion is that both ASTER georef and rotation/HDF->ers
translation are introducing errors...all data are in UTM N37 WGS84, on NT
using ERM 6.3.
many thanks,
Eric
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