Can you tell me what video you saw the option you mention? Perhaps it was a different option in an older version. The greyed out option from Show Point Cloud is usually the Source ID, which is only available when you open more than one LAS file. From the Lidar help: Source ID is a value marked for each file when files are imported into a project. When multiple input files are imported, a different source ID is used for each file. If only one input file is imported, the source ID is not used. To show point features by source ID, the project must contain two or more input files that contain multiple, distinct source ID values.

Hi Maoqi Sun, Unfortunately, I am not seeing a screenshot. But I will try to offer some suggestions anyways. Processing data in ENVI LiDAR will automatically classify the point cloud. Once you process the point cloud, you should see the point classes appear in the Layer Manager (by default on top left of screen). Turn off the Vectors in the Layer Manager and leave all of the points checked on. Make sure you have 'Color by Height' and 'Shade by Intensity' turned off on the main toolbar to view the points as they are classified by ENVI LiDAR. You can also change the default classified point colors by going into your preferences (File > Preferences). Hopefully this helps! Joe

Thanks for the reply. The video link is https://www.youtube.com/watch?v=aZXSsS1w7aY. On 17:51, the video showed that "show point feature by classification". However, in my software, I only have show point features by frequency, by normal, greyed out by source ID, and by return number. I could not upload my screenshot. But I tried to explain it clearly as much as I could. Thanks for your help in advance.

Hi Joe, thanks for your reply. I could upload the screenshot to the forum, not sure why. The video I watched is https://www.youtube.com/watch?v=aZXSsS1w7aY. On 17:51, it showed that he did show point features by classification. This is before processing the data. However, in my software, I only have options in the show point features by frequency, by normal, by source ID (greyed out), and by return number.I am wondering the why it does not work in my software. Thanks, Maoqi

Hi Maoqi, I did a little more digging. That video is actually from a webinar that I did last spring, so I was curious why I didn't see that option in my current version of ENVI LiDAR either. After speaking with the engineers, it turns out that it was not working properly so it was removed until they could get it fixed. All of the classes were shaded gray, making it impossible to tell them apart. I have been informed that it is high on their list to get that functionality working correctly. For now, you should be able to view the point classifications using the option I mentioned above (via the Layer Manager after processing the point cloud). Thanks! Joe

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