Custom layer overlay disappears as I zoom in

Thomas Charland's Avatar

Thomas Charland

14 Sep, 2021 05:59 PM

Hi! I have just added the strava global heatmap as a custom layer in Caltopo and it seems to work juste fine until I try to zoom in. If I zoom under the 3miles/5km scale, the overlay disappears completely and only comes back when I zoom out again. I have seen somebody doing this to get the Strava Heatmap working and he could zoom as much as he wanted, so I assume the problem is on my side. Could you please locate my mistake?
The URL I have used is:{Z}/{X}/{Y}.png
The zoom level is 16 and I chose transparent overlay as an option.
I have also attached a video showing the situation.

Thank you,

  1. Support Staff 1 Posted by Meghan on 14 Sep, 2021 10:51 PM

    Meghan's Avatar

    Hi Thomas,

    It looks like the higher zoom levels are now blocked by Strava for authentication. I did a quick internet search and found these links with some more information and possible solutions (at least for OSM- not sure it would work in CalTopo): and

    You're welcome to check that out and see if you can figure out a solution. We are unable to provide support for the actual setting up of the link though.


  2. 2 Posted by Thomas Charland on 15 Sep, 2021 03:42 AM

    Thomas Charland's Avatar

    Thanks for tout answer! Sadly I don't understand half of what is said in the forum thread you linked.. I think I will put this idea aside for now.
    Have a nice day!

    Télécharger Outlook pour Android<>

  3. Julie closed this discussion on 15 Sep, 2021 02:30 PM.

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