Downloaded (offline) maps don't load when there is no cell service

jeromesicard's Avatar


31 Mar, 2021 02:56 AM


I love the CalTopo maps and all the neat tools and features that they offer. I used to have a Legacy basic account which just expired. Before renewing, I'd like to resolve a major issue that I frequently ran into: even though I downloaded offline maps for all the tiles in a region where I hiked, I was often not able to load the maps on my Android phone when later my phone did not have cellular service.

Are you aware of this issue and was it a misuse on my part? I'd love to renew my membership if I can get this feature to work.


  1. Support Staff 1 Posted by Meghan on 31 Mar, 2021 09:08 PM

    Meghan's Avatar


    Thanks for reaching out! Before we troubleshoot your issue, I think it's important to clarify the difference between maps and base layers in CalTopo. Maps are saved map objects (markers, lines, etc) at specific coordinates that you view on top of base layers. To use the mobile app offline, you do need to download base layers to your mobile device that you can view the map objects on when you don't have a data connection. The process for how to download base layers to your mobile device is covered in the Offline Use section of our training site.

    My suggestion would be to take a look at the training site page and let us know if you have specific questions about the process- is there a particular step where it didn't work as expected for you? And if so, what did you do and what was the result?

    Of note, I personally use the mobile app offline every weekend and I have found it to be extremely reliable.

    Thank you,

  2. Meghan closed this discussion on 31 Mar, 2021 09:08 PM.

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