Duplicate Markers in Travel Plan

Darryl's Avatar


19 Sep, 2021 10:10 PM

Hello! Thanks for the great analysis and planning tool!

Duplicate markers are included in the two lines in the attached file.

  1. Support Staff 1 Posted by Julie on 20 Sep, 2021 05:30 PM

    Julie's Avatar

    HI Darryl,

    Can you give me more of a description of when and where you are seeing the problem? Screenshots would help.


  2. Julie closed this discussion on 20 Sep, 2021 05:30 PM.

  3. Julie re-opened this discussion on 20 Sep, 2021 05:30 PM

  4. 2 Posted by Darryl Olson on 20 Sep, 2021 06:51 PM

    Darryl Olson's Avatar

    Julie - thanks for looking into this. The attached travelplan.csv has the
    duplicate markers highlighted in yellow. The attached .json file can be
    used to create the travel plan.


  5. Support Staff 3 Posted by Julie on 20 Sep, 2021 09:53 PM

    Julie's Avatar


    I opened the csv but the highlighting didn't come through with that file type. For future reference, it's much easier for us to get to the bottom of something quickly if you send us a link to a CalTopo map and screenshots instead of files.

    The best I can figure out here for what you are trying to describe is that you created a line for the trip, and added markers along the line that can then be used by the travel plan feature to break up the travel time. However, more points are showing up in the travel plan than those that you put on the map. Some of those have the same coordinates, (and the same name in the CSV file) but the elevation changes from one line to the next.

    I believe what is happening here is that the travel plan is looking for markers within 100 feet or so of the line. In some places, you have switchbacks where the switchback re-enters that 100-foot radius a second time (ex marker ME03SB NE). The travel plan recognizes that as a marker along the route a second time, but gives you the elevation of the line rather than of the marker, and the new distance and time.

    I'll of course pass this on to the team, but I'm not sure if they will decide this is a bug or not, and if it should get fixed sooner or later.


  6. Julie closed this discussion on 20 Sep, 2021 09:53 PM.

  7. Darryl Olson re-opened this discussion on 21 Sep, 2021 02:38 AM

  8. 4 Posted by Darryl Olson on 21 Sep, 2021 02:38 AM

    Darryl Olson's Avatar

    Julie - I apologize for not providing the needed information.

    Here's the link <https://caltopo.com/m/M0JTP>to the map.

    Enclosed are screen shots.

    There is only one duplicate marker that is not associated with a
    switchback, ME054400.


    [image: image.png]

    [image: image.png]

  9. 5 Posted by Steve H on 21 Sep, 2021 05:37 PM

    Steve H's Avatar

    This happens a fair amount. Normally it's a simple matter to remove the second occurrence in a spreadsheet editor without much consequence to the elevation / distance data that follows relative to the next point (since the duplicate point references are so close together along the track plan). But it's clearly a bug based on some faulty coding logic, understandable for a new feature like travel plan. Capturing point data within x distance of the track is smart, but in spirit we are saying these points are along the linear track itself, we are encountering them only once, and so they should not be repeated. The second iteration (third etc) could be flagged in code as redundant (point has identical coordinate information) and discarded when generating the travel plan.

  10. Support Staff 6 Posted by Julie on 21 Sep, 2021 09:14 PM

    Julie's Avatar

    We're going to look at it when we have a chance.


  11. Julie closed this discussion on 21 Sep, 2021 09:14 PM.

  12. Darryl Olson re-opened this discussion on 21 Sep, 2021 10:42 PM

  13. 7 Posted by Darryl Olson on 21 Sep, 2021 10:42 PM

    Darryl Olson's Avatar

    Thanks, Steve. I appreciate the explanation.

    The route may not be a very good one.

    Thanks for continuing to improve CalTopo. A valuable, useful tool gets lots
    of feedback. No feedback is bad news.

    CalTopo is the tool of choice for route a analysis and planning!


  14. Support Staff 8 Posted by Julie on 22 Sep, 2021 02:21 PM

    Julie's Avatar

    Hi Darryl and Steve,

    We do appreciate the feedback, and we will be improving this tool. It's not our intention to make you have to go into other programs to make it work better for you.


  15. Julie closed this discussion on 22 Sep, 2021 02:21 PM.

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