| landsat pixel Lat/long from ENVI [message #39588] |
Thu, 27 May 2004 06:50 |
guillem.soria
Messages: 3
Registered: May 2004
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Junior Member |
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We have used two methods to obtain
the lat/long of landsat 7 pixels in ENVI, firstly using
ENVI_CONVERT_FILE_COORDINATES method and secondly, on the advice of
RSI, exporting the data from a Region of Interest (ROI) to a text
file, which contains all the band information, map coordinates and
lat-long information.
However, we have some rather large discrepancies (around 0.005
degrees) between those lats and longs displayed in ENVI using the
cursor display facility, and those that result from our own extraction
procedures ( including the ROI values exported from ENVI!). The map
coordinates (in m) appear to be identical in all instances, suggesting
that the problem is constrained to the convertion of map coordinates
to geographic latitudes and longitudes.
If you have any advice on this issue we would be most grateful.
Many thanks,
Lizzie Noyes & Guillem Soria
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