Changes between Version 15 and Version 16 of Procedures/lidarprotocol


Ignore:
Timestamp:
Sep 3, 2009 11:17:33 AM (10 years ago)
Author:
knpa
Comment:

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  • Procedures/lidarprotocol

    v15 v16  
    1414 * A) Opposing flight lines (fully overlapping)
    1515   * 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
     16   * Record the final “tweak” in a text/spreadsheet file in project directory
    1717   * 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. 
    1818
     
    2121 * B)Parallel flight lines (semi-overlap, all same direction)
    2222   * Using overlap region for each pair of images can manually tweak roll until bias removed
    23    * Record the final “tweak” in file XYZW
     23   * Record the final “tweak” in a text/spreadsheet file in project directory
    2424   * 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.
    2525
     
    2929   * Look for zig-zagging elevations over all flight lines eg the site will look like: /\/\/\ (beware of true sloping terrain)
    3030   * Tweak roll manually until flight lines look more like ------. It may be difficult to see the whole site in this way so zoom in and measure offsets with the profile viewer. As long as two opposing flightlines overlap to some degree there will be a height offset at both sides of the overlap region (where the profiles cross).
    31    * Record the final “tweak” in file XYZW
     31   * Record the final “tweak” in a text/spreadsheet file in project directory
    3232   * 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.
    3333
     
    3838   * Else deliver as is informing PI there is possible (probable) bias in the data, and give an estimate of the magnitude if possible.
    3939
    40 '''For each image in each data set note the following:'''
     40'''For each image in each data set note the following in the text/spreadsheet file:'''
    4141 * Calibration file used
    4242 * Flight height and direction