Changes between Version 16 and Version 17 of Processing/Lidarqcprocedure


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Timestamp:
Sep 21, 2009 11:07:19 AM (10 years ago)
Author:
emca
Comment:

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  • Processing/Lidarqcprocedure

    v16 v17  
    2323To run on large projects use "selected files" instead of reading all LAS files into memory.
    2424
    25 Ensure that the output format under 'Save As:' is .LAS (1.0 if possible- may be issues with las2txt.sh and LAS 1.1).
     25Ensure that the output format under 'Save As:' is .LAS (1.0 if possible - may be issues with las2txt.sh and LAS 1.1).
    2626
    2727Check the result to see what points have been selected.
    2828
    29 To delete the points: Point -> Delete -> by class ['''This should not be done for operational processing of data''']
    30 
    31 Can select/deselect points using the Add Point To Ground tool from the Classify menu to amend points which were missed or wrongly classified by the classification algorithms. Select the required options on the 'from class' and 'to class'  drop down boxes and individually select each point to reclassify it.
     29Can use the Assign tool from the Classify menu to amend points which were missed or wrongly classified by the classification algorithms. Select the required options on the 'from' and 'to class'  drop down boxes and individually select each point to reclassify it. [[BR]]
     30If there are a large number of points to be reclassified manually there are several tools (available by clicking on the 'Create Editable Model' icon) which allow groups of points to be reclassified. Be careful if using the 'Classify Using Brush' tool. This tool becomes active once the left mouse button has been clicked. Right click with the mouse to deactivate this tool.
    3231
    3332To remove haze layers, use elevation to threshold (Routine: by absolute elevation). Select an elevation range whose minimum is well above any ground targets and maximum above the haze layer.