Changes between Version 38 and Version 39 of Processing/Lidarqcprocedure


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Timestamp:
Dec 22, 2009 3:55:08 PM (9 years ago)
Author:
knpa
Comment:

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  • Processing/Lidarqcprocedure

    v38 v39  
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    29 Check the result (using profiles of various thicknesses) to see what points have been classified using the macro. There may be points which were missed or wrongly classified by the classification algorithms.These will need to be changed manually using the procedure outlined below. If there are many points that are wrong it may be better to edit the macro (increasing the 'low point' threshold from 0.5m to 2m sometimes yields better results for instace).
     29Check the result (using profiles of various thicknesses) to see what points have been classified using the macro. There may be points which were missed or wrongly classified by the classification algorithms. If there are many points that are wrong you may need to edit the macro (increasing the 'low point' threshold from 0.5m to 2m sometimes yields better results for instance).
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    3131To 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.
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    34 '''Manually'''
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    36 '''Note: Manually reclassifying points can only be done on a per flight line basis.'''
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    40 Can use the Assign tool from the Classify menu reclassify individual points. Select the required options on the 'from' and 'to class' drop down boxes and individually select a point to reclassify it.
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    42 If 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 and reclassified anything that falls with the region indicated by the mouse icon. Right click with the mouse to deactivate this tool.
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