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Last Post 14 Jul 2017 11:17 AM by  Mari Minari
Point cloud classification in a forest area
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Lucas ROSA



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11 Jul 2017 12:11 PM
    Hello. My name is Lucas and I'm a beginner user of ENVI LiDAR. I was wondering if anyone here could help me with point cloud classification. I need to classify a forest area in 3 levels (strata): trees (above 1.3 meters); shrubs (between 0.75 m and 1.29m) and grasses (under 0.75m), each one represented by a different color. I read some guides but isn't clear for me yet how to do it in Envi lidar, can someone give me this little help or indicate a specific guide/tutorial???

    Mari Minari



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    12 Jul 2017 02:22 PM
    I think this sample code is similar to what you are trying to do:
    https://www.harrisgeospatial.com/do...nsity.html

    Lucas ROSA



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    13 Jul 2017 06:47 PM
    When I try to use Forest Density Extension, this error appears: "Unexpected error: Invalid object reference: <OBJREF (<ObjHeapVar240810>)>.". Do you know why?

    Lucas ROSA



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    13 Jul 2017 06:50 PM
    [quote]
    Posted By Mari Minari on 12 Jul 2017 02:22 PM
    I think this sample code is similar to what you are trying to do:
    https://www.harrisgeospatial.com/do...nsity.html

    [/quote]

    Thanks for your help! However, when I try to use this extension, this error appears: "Unexpected error: Invalid object reference: )>."

    Do yoy know why?

    Mari Minari



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    14 Jul 2017 11:17 AM
    What version of IDL / ENVI did you open the .pro file? Did you first compile the code prior to running the program? Did you select the sample data set from the \envi5x\data\lidar directory to see if it would first run on that data set? I was able to run this successfully in 5.3 and 5.4..
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