OpenTopoMap

OpenTopoMap is a topographic mapnik 3+ xml (non CartoCss) map style using data from OpenStreetMap contributors and various Data Elevation Model. Created by @der-stefan, @max-dn and others. There is an HOWTO install an OTM tile server (but this guide is outdated and was made for Ubuntu 16.04. It can be adapted to modern Linux distributions but need a lot of adaptation, As of december 2025 I'm running the openmaps.fr's instance on a Debian 12).

As of 2025-12-18 2 world wide accessible instances exists that I know of :

• The "main one" is at https://opentopomap.org (to be partially discontinued in january 2026)
• One using this repo whose README you are reading right now, visible at openmaps.fr

This instance of OpenTopoMap can also be used in other applications. If you include tiles from tile.openmaps.fr in your project, you must read and accept the Tile usage policy where you will also find the URLs for this map style.

Map's legend...

Can be seen here OTM-R's map legend

OpenTopoMap-Revived

This instance, that I'd like to call OTM-R (for OpenTopoMap-Revived or OpenTopoMap-Raster) for the time beeing, aims to be identical to the main instance's map for now and act as a failover/clone/in place replacement. While hoping to get help or time someday to improve the map itself. Except for a few changes :

• Contours, hillshading and elevation color was composed and kindly provided by @Yvecai from https://www.opensnowmap.org and based on :

  • ASTER GDEM is a product of METI and NASA
  • SRTM 1 Arc-Second Global
  • EU-DEM: Prroduced using Copernicus data and information funded by the European Union
  • France – RGE ALTI® 5m © IGN
  • Switzerland – Alti3D © swisstopo
  • US & Canada – NED 1arcsec U.S. Geological Survey
  • Austria – DHM 10m - CC-BY-4.0: Land Kärnten - data.gv.at
  • Italy – Tinitaly 10m – CC BY 4.0 Tarquini S., I. Isola, M. Favalli, A. Battistini, G. Dotta (2023). Istituto Nazionale di Geofisica e Vulcanologia (INGV).
  • Norway - DTM 10 Terrengmodell (UTM33) – CC BY 4.0 Kartverket

• Geotiff files (One for color+shade and one for shade) were merged into two tiff with overviews to reduce the xml code and number of files

• the "contours" table in it's own database was move to the gis database

• the lowzooms tables were put back into the gis database

• saddle icons orientation was postponed (all are shown vertical : ][)

• Contours are not shown over lakes or sea, and 0m lines were re-added