Looking for 3D terrain or contour lines data for Germany

tordans · April 17, 2023, 1:37pm

I have a map at https://radverkehrsatlas.de/ which uses Maplibre GL JS. I would like to give some feedback to users on hills and elevation changes.

I see two possible ways to do this … but I did not find any open data for Germany that I could use to add those features.

Option 1: Use Maplibre 3D Terrain

It looks like I need png-XYZ-Tiles for „terrainSource“ and „hillshadeSource“.

Does anyone know about Open Data for Germany that can be used in this way?

Option 2: Contour lines (GER: “Höhenlinien”).
Is there a dataset (for Germany) that would allow to add contour lines as pixel or vector data to maps?
I see that Thunderforest has data for Germany in eg. Landscape - Thunderforest, but I don’t see a data source reference.

Thanks for hints!

tordans · April 17, 2023, 1:48pm

After posting this, I found more links and Info. I will update this thread with what I find…

Still not sure what the easiest path is. Did not find something for Maplibre (Option 1), yet, that looks like it would work out of the box. And also no easy way to add contour lines, but a lot of interesting hints at the raw data.

https://extract.bbbike.org/ has exports for Shuttle Radar Topography Mission (SRTM) contour lines in 4 formats
OpenStreetMap Schweiz shows hillshades and contour lines
OpenSnowMap.org shows hillshades and contour lines. It lists " * 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" as sources.
OpenTopoMap - Topographische Karten aus OpenStreetMap, OpenTopoMap - Topographische Karten aus OpenStreetMap has hillshades and contours and links to http://viewfinderpanoramas.org/ for SRTM
Add terrain relief data · Issue #2931 · gravitystorm/openstreetmap-carto · GitHub has a lot of good links (most listed here)
Shaded relief maps using mapnik - OpenStreetMap Wiki and Contour relief maps using mapnik - OpenStreetMap Wiki are older but still interesting pages that go into details on contour lines and hillshades.
https://contourmapcreator.urgr8.ch/ seems to allow to extract data from the Google elevation API Elevation API – Übersicht | Google Developers
(not working) Historical Objects should have hillshades but uses the (partially?) broken https://b.tiles.wmflabs.org/hillshading/14/8609/5632.png server, more below
A few OSM projects use data from tiles.wmflabs.org which does not work anymore. There is a ticket on this at ⚓ T187601 Examine replacing tiles.wmflabs.org with production tile server
Hillshade demo provides hillshading as a separate tile layer and links to http://viewfinderpanoramas.org/ (like OpenTopoMap)

mcliquid · April 17, 2023, 2:25pm

Ich verwende die Höhen-Konturlinien von velomap. Dort werden folgende Quellen genannt. Vielleicht hilft dir das weiter?
Sonny hat auch erst vor kurzem hier einen Post gemacht: LiDAR Digital Terrain Models (DTM) of European countries

LIDAR Daten von offenen Datenquellen bei Ländern/Ämtern/Regierungen oder anderen freien Daten - zusammengestellt ins .hgt Format von Sonny - DEM Altitude Models für viele europäische Länder.
ALOS World 3D30 nur verfügbar zwischen 60° Süd und 60° Nord.
SRTM 1" v3.0 - dort wo ALOS Word 3D viele Fehler hat - oder teils nicht verfügbar ist - sehr selten.
Viewfinderpanormas 1" - then 3" - Südlich 60° Süd, und Nördlich 60° Nord.
SRTM v3.01 3" v3.0 - ganz ganz selten. 8 Kacheln wo alle obigen Quellen nicht verfügbar sind.

ikonor · April 17, 2023, 2:28pm

For hillshading, I currently use AWS Terrain Tiles (demo) as a replacement for the wmflabs tiles. Note that there might be GDPR/DSGVO issues in Germany as Amazon is US-based.

qugeb · April 17, 2023, 2:38pm

Zu den Konturlinien kam ja schon was zusammen.
Aber wenn du keine Konturlinien erstellen möchtest sondern den Streckenabschnitten direkt eine Neigung zuweisen, die dann angezeigt werden kann, würde ich auf irgendein DGM zurückgreifen und daraus dann mittels üblicher Geoverarbeitungswerkzeuge die Neigung berechnen und die Werte entsprechend abtasten.

DGM z.B. hier in recht schlechter Aufllösung, gibt aber sicher auch andere Quellen