Changes between Version 11 and Version 12 of Procedures/lidarprotocol
- Timestamp:
- Aug 14, 2009, 2:51:02 PM (15 years ago)
Legend:
- Unmodified
- Added
- Removed
- Modified
-
Procedures/lidarprotocol
v11 v12 10 10 3. Process the LIDAR using the finalised calibration parameters ([wiki:Processing/ALSPP ALSPP]). 11 11 12 In the case of images that exhibit roll offsets AFTER application of the boresight parameters then apply the following procedure: 12 4. 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 13 14 * 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. 16 18 17 19 [[Image(oppose.jpg)]] … … 19 21 * B)Parallel flight lines (semi-overlap, all same direction) 20 22 * 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. 22 25 23 26 [[Image(paralell_same.jpg)]] … … 26 29 * Look for zig zagging elevations on all flight lines eg /\/\/\ (beware of true sloping terrain) 27 30 * tweak roll manually until flight lines look more like ------ 28 * Record the final “tweak s” in file XYZW31 * Record the final “tweak” in file XYZW 29 32 30 33 [[Image(paralell_diffjpg.jpg)]] … … 42 45 * ..and any other potential correlates 43 46 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).47 5. 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). 45 48 46 5. Perform [wiki:Processing/Lidarqcprocedure QC]49 6. Perform [wiki:Processing/Lidarqcprocedure QC]