Changes between Version 11 and Version 12 of Procedures/lidarprotocol


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Timestamp:
Aug 14, 2009 2:51:02 PM (10 years ago)
Author:
knpa
Comment:

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  • Procedures/lidarprotocol

    v11 v12  
    10103. Process the LIDAR using the finalised calibration parameters ([wiki:Processing/ALSPP ALSPP]).
    1111
    12 In the case of images that exhibit roll offsets AFTER application of the boresight parameters then apply the following procedure:
     124. In the case of images that exhibit roll offsets AFTER application of the boresight parameters then take pairs of overlapping flightlines and apply one of the following tweaking methods depending on the nature of their overlap:
     13
    1314 * A) Opposing flight lines (fully overlapping)
    14    * Can observe profiles across track ideally for an area of flat terrain for each pair of images and manually tweak the roll values to remove bias
    15    * Record the final “tweaks” in file XYZW
     15   * Can observe profiles across track ideally for an area of flat terrain for each pair of images and manually tweak the roll value to remove bias
     16   * Record the final “tweak” in file XYZW
     17   * Try this new roll value for all other flightlines. If is not correct for the rest of the site then there is a inter-flightline roll variation. Move onto the next pair of flightlines. 
    1618
    1719[[Image(oppose.jpg)]]
     
    1921 * B)Parallel flight lines (semi-overlap, all same direction)
    2022   * Using overlap region for each pair of images can manually tweak roll until bias removed
    21    * Record the final “tweaks” in file XYZW
     23   * Record the final “tweak” in file XYZW
     24   * Try this new roll value for all other flightlines. If is not correct for the rest of the site then there is a inter-flightline roll variation. Move onto the next pair of flightlines.
    2225
    2326[[Image(paralell_same.jpg)]]
     
    2629   * Look for zig zagging elevations on all flight lines eg /\/\/\ (beware of true sloping terrain)
    2730   * tweak roll manually until flight lines look more like ------
    28    * Record the final “tweaks” in file XYZW
     31   * Record the final “tweak” in file XYZW
    2932
    3033[[Image(paralell_diffjpg.jpg)]]
     
    4245 * ..and any other potential correlates
    4346
    44 4. Collate the data and analyse it – look for trends within the flight data sets (per project) and also the complete set of data (all projects together).
     475. Collate the data and analyse it – look for trends within the flight data sets (per project) and also the complete set of data (all projects together).
    4548
    46 5. Perform [wiki:Processing/Lidarqcprocedure QC]
     496. Perform [wiki:Processing/Lidarqcprocedure QC]