Import X,Y,Z points

Hello GM users,

I have CSV files with X,Y,Z values. X,Y are in DDDMM.SS format and Z is a value representing air quality. I have 250k points for 2x2 km area.
I can, if needed, rework the CSV file to another text format.

I need to represent the Z values as color dots on the map, with a predefined color scale.
I tried various bits of solutions found on this forum without much success.

What would be the best way to achieve that ?

Alex

Answers

  • aldugaldug Posts: 2
    As often, I found a solution right after asking the question !
    So, in case someone is looking for the answer :
    You must have a file with right format, e.g. :
    N3134.6008131;W0312.1044602;16.800457
    N3134.6005327;W0312.1046916;15.539769
    N3134.6003947;W0312.1048163;15.119999

    Import the file using "open generic text file", select right coordinate order and forma, check "treat 3rd coordinate value as elevation", press OK
    Export > Export Vector / Lidar Format, select Lidar LAS file.

    Reimport the LAS file. You should have a nice set of color dots.
    And if you want to change to color scale, go to tools -> configure -> shader options and define the shader you want.
    You can then apply you new shader by selecting it from the dropdown menu at the top right of your screen.

    HTH

    Alex



  • BillBBillB Global Mapper User Posts: 115Trusted User
    Alex, thank you for sharing.  Even if somebody does not have the precise same requirements, that approach provides another way of visualising a terrain.  Just had a quick go on one of our projects and it converts the nodes of a terrain or of contours into points - useful :)
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