Changes between Version 21 and Version 22 of Sensors/LeicaLIDAR/MikesNotes


Ignore:
Timestamp:
Sep 1, 2008 10:50:52 AM (10 years ago)
Author:
mggr
Comment:

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  • Sensors/LeicaLIDAR/MikesNotes

    v21 v22  
    11== todo ==
    22
    3 ground classification
    4 
    5 torsion error correction
     3
     4
     5== Mirror torsion error correction ==
     6
     7This shouldn't need to be done with newer LIDARs, but included here in case.  Leica suggests checking for torsion errors if there seem to be problems in the boresight calibration and reporting to them if found.
     8
     9TBD
     10
     11== Ground classification ==
     12
     13Classification is the process of labelling the points in the point cloud by type.  Ground classification specifically refers to labelling points that're considered to be part of the ground(!)  This is a required step for the automatic boresight procedure.
     14
     15Steps:
     16 * remove very low, noisy points from consideration first
     17   * e.g. remove groups of up to 3 points > 1m below neighbours (iterate a time or two so it settles)
     18
     19
    620
    721
    822== QC procedures ==
    923
    10 ''Mark seems to have covered these better, key concepts only here''
     24''Mark seems to have covered these better, and this will need some detailed clicky info, key concepts only here''
    1125
    1226Essentially all using TerraScan.  The main things are:
     
    3953Calibration files are required and supplied by Leica (dark, gain and camera parameters).
    4054
    41 File name convention is: `''DDHHMMSSXXXXXXG''N.raw`
     55File name convention is: `DDHHMMSSXXXXXXGN.raw`
    4256 * DD = day of month
    4357 * HHMMSS = timestamp