Global Mapper v25.0

Applying colour scale to X,Y,Z,Scalar file

Sam L
Sam L Global Mapper User
edited December 2013 in Vector Data
Hi All,

I have a shapefile and large ASCII file of X,Y,Z,Scalar data (23MB) in the following format:

536190.00,5404100.00,0.00,0.042326
536200.00,5404100.00,0.00,-0.008495
536210.00,5404100.00,0.00,-0.002622
536220.00,5404100.00,0.00,-0.000138
536180.00,5404110.00,0.00,0.010029

I have tried to import this as LiDAR data with the Scalar being intensity but my software crashes. I can import this as elevation data but all the Z values are 0.00. Is there a way to import this as points and apply a colour scale to distinguish between the Scalar values?

Many thanks,

Sam L

Comments

  • global_mapper
    global_mapper Administrator
    edited November 2013
    Sam,

    I'm sorry I'm not sure how I didn't see this before. What you can do is name your file as .xyzi and load as 'Point Only'. Uncheck the box to treat the 3rd value as elevation and check the box to include attributes from coordinate lines. Then you should have the 3rd and 4th columns as attributes of each point. You can then go to the Point Styles tab of the Options dialog for the layer and set up attribute-based styling on what is likely called ATTR_2 (the intensity column).

    Another option would be to first pre-multiply the 4th column by something to get it in a normal intensity range for Lidar (whole numbers from 0-255 usually). Then name as .xyzi and load as a Lidar point cloud on the ASCII import dialog and the 'Color by Intensity' lidar setting should then work.

    Thanks,

    Mike
    Global Mapper Guru
    geohelp@bluemarblegeo.com
    Blue Marble Geographics for Coordinate Conversion, Image Reprojection and Vector Translation
  • Naeem57
    Naeem57 Global Mapper User
    edited December 2013
    Glad i discovered this on google. You efforts to provide us so nice and useful information are pretty good.