We can download OpenTopoMap bulk export from https://garmin.opentopomap.org/. Vector or bitmap files? I'm not sure and I need PNG files.

This is useful for GPS devices, but this can be also useful when you want to use OpenTopoMap offline, or with a slow internet connexion (because instead of download tiles from opentopomap.org, tiles are retrieved from bulk export).

How can I get a PNG tile from the previous files?

Is there a very simple (python) program to read theses data?
For example $ the_magic_program 16_32752_21788 returns an image data.

  • Which GIS software are you using?
    – BERA
    Sep 17, 2022 at 17:25
  • I use leafletjs with my browser.
    – luigifab
    Sep 17, 2022 at 18:57
  • Simplest way to download tiles for opentopomap.org map to local machine and then use tiles from there would probably be SAS.Planet app, here is one possible download link learngeom.com/2021/08/…. If the latest version of the app does not work, try an older one. I'm using one from 2019.
    – TomazicM
    Sep 23, 2022 at 20:48

1 Answer 1


You could use your own local tile server. Here is a complete walk-through how to set up a OpenTopoMap tile server:

You could also set up a local proxy server (with content caching). The initial access for a map area will still be slow but recurring requests will be faster since the proxy is local:

This answer to another question suggest:

You could mass-download their tiles with any suitable tool or script, but please ask them before for permission and rate-limits, see https://opentopomap.org/credits


You could write a simple Python script downloading all tiles for your desired map area. However, as mentioned in bugmenot123's answer, please ask them before for permission and rate-limits.

Note: I missed the part about the slow internet connection in your question at first. Sorry. Just ignore the next part of this answer. I leave it in case it's helpful for someone else.

If you want to use it in Leaflet, you may be able to use one of their tile server:

  • https://{s}.tile.opentopomap.org/{z}/{x}/{y}.png

Additional information and terms of use on their About page.

Here is an example using Leaflet with https://{s}.tile.opentopomap.org/{z}/{x}/{y}.png:

<!DOCTYPE html>
<html lang="en">
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>OpenTopoMap Leaflet Example</title>
  <!-- test code / integrity attribute removed for readability -->
  <link rel="stylesheet" href="https://unpkg.com/[email protected]/dist/leaflet.css" />
  <script src="https://unpkg.com/[email protected]/dist/leaflet.js"></script>

  <div id="map" style="height: calc(100vh - 1rem);"></div>


      const map = L.map('map')
          .setView([44.6475, -63.580278], 11);

      L.tileLayer('https://{s}.tile.opentopomap.org/{z}/{x}/{y}.png', {
          attribution: `Kartendaten: © OpenStreetMap-Mitwirkende, SRTM 
                                  | Kartendarstellung: © OpenTopoMap (CC-BY-SA)`



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