Changes between Version 16 and Version 17 of Sensors/LeicaLIDAR/MashUp


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Timestamp:
Oct 13, 2009 10:31:44 AM (10 years ago)
Author:
knpa
Comment:

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  • Sensors/LeicaLIDAR/MashUp

    v16 v17  
    560560 * Its better to classify too few points to ground than too many.
    561561 * Its good to preclassify more difficult areas first. [i.e. classify large buildings and steep hill tops].
     562 
    562563 * In TerraScan load in a LAS file.
    563  * Classify->Routine->ground
    564    * use measurement tool to get max building size in area. Also for terrain slope can view elevation and use cross section tool to measure/estimate it.
    565    * Initial points = aerial low and ground
    566    * iteration angle = 6 degree to start with
    567    * iteration distance = 1m to start with
    568564 * Before ground classification we should remove noisy points.
    569565   * Default -> low points classification.
    570566   * Do this for group of points and then single points.
    571    *  We can set up a macro to do this.
     567   * We can set up a macro to do this.
    572568 * Set up the Macro
    573569   * Tools -> Macro
     
    578574   * To run on large projects use “selected files” instead of reading all into memory.
    579575 * Run the macro and check result.  Update distances etc used in the classifications if needed.
     576 * Now to classify the ground points:
     577   * Classify->Routine->ground
     578   * use measurement tool to get max building size in area. Also for terrain slope can view elevation and use cross section tool to measure/estimate it.
     579   * Initial points = aerial low and ground
     580   * iteration angle = 6 degree to start with
     581   * iteration distance = 1m to start with
    580582 * Then add ground classification. 
    581583   * Default -> ground.