Offline Custom Layers

kyolson's Avatar


20 Oct, 2021 07:53 PM


I have had a subscription to Caltopo in the past and really enjoyed it. However, now I live outside of the US. I have been able to find my local maps and import them into Caltopo however they only work online. I see that Caltopo is going to add global offline maps soon if I am not mistaken), I am wondering if you had any more precision to that date? Also if you need any beta testers for offline maps from a custom source, I would be interested! If Caltopo had this feature I would definitely resubscribe!


  1. 1 Posted by caver456 on 20 Oct, 2021 08:13 PM

    caver456's Avatar

    Hi Kyle - just another user here, not caltopo staff - just wanted to make
    sure you know that you can place a .mbtiles file (from any source) in the
    right folder on your phone or computer and caltopo will read it in, such
    that it shows up as either a base layer or overlay in the usual manner as
    other layers.

  2. 2 Posted by caver456 on 20 Oct, 2021 08:18 PM

    caver456's Avatar

    sorry, I should clarify - placing a .mbtiles file on your computer only
    works when you are running Caltopo Desktop. For CTD, place the file in the
    same folder as the rest of your local tiles. For your phone, place the
    file in 'the right place' - for me, on Android, it's

  3. Support Staff 3 Posted by Meghan on 21 Oct, 2021 04:39 PM

    Meghan's Avatar

    Hi Kyle,

    We are actively working on global offline downloads although I don't have any exact date on when they will be available. However we will be rolling it out to beta testers soon and we are always looking for more beta testers, especially enthusiastic ones like you! If you (or anyone else who reads this thread) is interested in being a beta tester, please let us know what platform you use (Android or iOS) and I will share sign up information with you.

    To be clear, we are rolling out global offline downloads. Currently you still can't download and view layers from a custom source offline. You can download and view Map Sheets while offline- you can learn more about Map Sheets in this section of our user guide:

    Thank you,

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