Global Mapper v25.0

Coloring track depending speed

darrepac
darrepac Global Mapper User
Hello

I have tons of GPX track and I would like to color each track depending speed. How can I achieve that?

thx

Answers

  • 946
    946 Global Mapper User Trusted User
    One way could be this:


    Is this what you are after?
    2.JPG 291.5K
    1.JPG 312.5K
  • darrepac
    darrepac Global Mapper User
    Thanks for your input.
    They are several problem with your solution:
    - first of all I don't have the speed as a feature (GPX file, since version 1.1, doesn't contain speed, it has to be calculated trackpoint per trackpoint
    - second, if I had speed, it seems like each track would have 1 speed and so 1 color, while I would like to color each with varying color depending speed.

    It would look like this for 1 track
    Conexiones WMS en CompeGPS - Foros de Montaa de Picos de Europa y  Cordillera Cantbrica
  • 946
    946 Global Mapper User Trusted User
    Ah, ok.
    You can do like this:

    Define the style as a custom dot shape 
    4.JPG 422.2K
  • darrepac
    darrepac Global Mapper User
    Problem, I don't have speed as an attribute...

  • geomannie
    geomannie Global Mapper User Trusted User
    I have done this is the past. It was convoluted and as I remember it involved flipping the GPX into a projected coordinate system (metres X & Y) & exporting the locations. I them opened the GPX file into Excel, appended the X & Y's in metres & calculated velocity by using the time diference between the points and the distance travelled between the points.

    I managed to make a series of points which I shaded by speed, exporting as a kmz file. I only did it once but if there was a need I would have improved the work flow. Maybe this gives you a clue to way ahead?
  • darrepac
    darrepac Global Mapper User
    Well!! sounds like a heavy process while I have tons of GPX file.
    So seems it is not feasible straight so I will forget about it or use an other SIG
  • geomannie
    geomannie Global Mapper User Trusted User
    There must be a easier way, but if you have Excel you could maybe write a script?
  • Hi!
    Maybe so? The archive contains pictures.

  • geomannie
    geomannie Global Mapper User Trusted User
    tikhpetr said:
    Hi!
    Maybe so? The archive contains pictures.


    Hi, forgive me for being cautious, but I will not open a rar or zip file from a public forum. Do you have uncompressed?

    Thanks
  • Set the correct sequence by screnshots numbers. And then they booted up at random.
  • geomannie
    geomannie Global Mapper User Trusted User
    Does not the GPX file you are using already have the calculated speed? The original question concerns when there is no speed data. How to calculate it.
  • Excuse me, here is the original. Don't be confused by the name. This is self-criticism. :)
    https://disk.yandex.ru/d/QG4p2CKdU-m9_Q
    For some reason, the forum does not load, I can only link.
  • Here is a screenshot of the track attribute table

  • darrepac
    darrepac Global Mapper User
    I am currently sick but I will take a look in your answer later on. Thanks
  • geomannie
    geomannie Global Mapper User Trusted User
    Hi tikhpetr,

    My mistake! I see that the vertices do indeed have the speed.

    Thanks for showing me,

    Cheers
  • geomannie
    Trivia! Happy to help.