Lidar: Load/crop by area issue

jh93989jh93989 Global Mapper UserPosts: 41Trusted User
edited August 2014 in Bug Report
When using "Only load Points within Bounds" and selecting "Crop to selected area features" GM will import all points, inside or outside of the selected area.

GM15.2 (b081114)

Thanks,

Jameson

Comments

  • DMcKittrickDMcKittrick Global Mapper Trainer Posts: 58Trusted User
    edited August 2014
    I was unable to replicate your problem in the current release version of the software.

    Without meaning to state the obvious, are you sure the correct area feature has been selected with the Digitizer before initiating the import of your LiDAR file? Do you see an error message when you attempt to select the Crop to Selected Area Feature(s) option?

    David McKittrick
    Senior Applications Specialist
    Blue Marble Geographics
  • jh93989jh93989 Global Mapper User Posts: 41Trusted User
    edited August 2014
    Perhaps I'm expecting something different then what this option was intended for. Here are the steps I am taking using an Las and SHP in the same projection.

    Original file and SHP Area.
    Correct_Area.jpg

    Import dialog with SHP selected.
    Import.jpg

    Results.
    output.jpg

    I'm looking to only import the points that are completely within a selected area. This is actually closer then I was getting before but still not what I was hoping to achieve.

    Thanks,
    Jameson
  • DMcKittrickDMcKittrick Global Mapper Trainer Posts: 58Trusted User
    edited August 2014
    Now I see the problem. It looks like the cropping process constrains the point cloud import to the MBR of the area feature, not the feature itself. I was using a rectangular feature in my scenario so I wasn't seeing the same results as you. I'll submit a development request to see if this can be fixed. In the meantime, you can easily crop the point cloud after it is imported. Select the area feature as before, right-click anywhere on the map and choose: Crop/Combine/Split Functions > CROP - Crop Loaded Features to Selected Area(s). This will delete all of the points outside the selected area.
  • jh93989jh93989 Global Mapper User Posts: 41Trusted User
    edited August 2014
    Ok, thanks David, that would be a great to see in a future build release.

    Jameson
  • DANBRIDANBRI Posts: 4
    Is what the "Crop/Combine/Split Functions> CROP - Crop Loaded Features to Selected Area(s)" works in the scripting language? if yes. Can you suggest how to script this steps.
    ii: I looking for load lidar data in ".las" format and crop it to selected area feature (with polygon'gip' extracted from ptcloud data)  using scripting language
  • DANBRIDANBRI Posts: 4
    If no, how to clean the noises at the edges of a cloud of points
Sign In or Register to comment.