Changes between Version 3 and Version 4 of FAQ/lev3upsidedown


Ignore:
Timestamp:
Jul 2, 2009 12:47:29 PM (10 years ago)
Author:
mggr
Comment:

--

Legend:

Unmodified
Added
Removed
Modified
  • FAQ/lev3upsidedown

    v3 v4  
    99Level 3 images are corrected for flight direction and will appear with north "up" in any viewer that reads the georeferencing information correctly (e.g. ENVI).
    1010
    11 If you see level 3 images where "up" is along the flight direction rather than north, this means your viewer hasn't correctly read the georeferencing information.  The most common case is loading the level 3 HDF directly into ENVI.  There is no well defined standard for georeferencing in HDFs so ENVI cannot read the information there and shows data in file order.  To avoid this problem, export the data to a BIL or GeoTIFF file and load that into ENVI instead, e.g.:
     11If you see level 3 images where "up" is along the flight direction rather than north, this means your viewer hasn't correctly read the georeferencing information.  The most common case is loading the level 3 HDF directly into ENVI.  There is no well defined standard for georeferencing in HDFs so ENVI cannot read the information there and shows data in file order, meaning some flight lines may appear with south "up".  To avoid this problem, export the data to a BIL or GeoTIFF file and load that into ENVI instead, e.g.:
    1212{{{
    1313 # BIL file (recommended), creates .hdr file too