Elevation data coverage and resolution by country
Topo-grapher sources the highest-resolution open government elevation data available for each location — from 0.4m LiDAR in Denmark down to a 30m global fallback that covers anywhere on land. Below is the full breakdown by country and data source.
Terrain accuracy is only as good as the underlying data. Rather than use one global dataset, Topo-grapher routes each request to the best national source for that location, then falls back gracefully where high-resolution data isn't published.
Resolution by country
| Country / region | Data source | Resolution | Vertical accuracy |
|---|---|---|---|
| National LiDAR datasets | |||
| Denmark | DHM/Terræn | 0.4m | ±0.05m |
| Scotland | SRSP LiDAR (Phases 1–6) | 0.5m | ±0.15m |
| Netherlands | AHN (via PDOK WCS) | 0.5m | ±0.05m |
| Luxembourg | ACT LiDAR 2024 | 0.5m | — |
| Switzerland | swissALTI3D | 0.5m | ±0.1m |
| England | EA LiDAR Composite DTM | 1m | ±0.15m RMSE |
| Norway | Kartverket DTM1 | 1m | ±0.15m |
| Estonia | Maa-amet DTM | 1m | ±0.1m |
| France | IGN RGE ALTI | 1m | ±0.2m |
| Germany (NRW, BW, Hessen) | DGM1 | 1m | ±0.2m |
| Belgium (Flanders) | DHMV II (Geo Vlaanderen) | 1m | ±0.15m |
| Canada | NRCan HRDEM | 1m | ±0.2m RMSE |
| United States | USGS 3DEP | 1–10m | ±0.82m RMSE |
| Finland | NLS KM2 | 2m | ±0.3m |
| Czech Republic | ČÚZK DMR4G | 5m | ±0.18m RMSE |
| Spain | IGN MDT (PNOA-LiDAR) | 5m | ±0.4m |
| Australia | GA DEM_LiDAR (populated areas) | 5m | ±0.3m |
| Italy | TINITALY | 10m | ±3m |
| Continental & global fallbacks | |||
| Iceland | ArcticDEM | 10m | ±1–4m |
| Europe (other) | EU-DTM / Copernicus GLO-30 | 30m | ±1–3m |
| Global (fallback) | Open-Meteo / SRTM | 90m | ±16m (90%) |
| Coming soon | |||
| Japan | GSI DEM | 5–10m | ±1m |
Resolution shown is the best available source for that region. US resolution varies by 3DEP coverage tier; Australia's 5m is limited to populated areas covered by Geoscience Australia's DEM_LiDAR programme; Belgium's 1m is Flanders-only via Geo Vlaanderen DHMV II — outside those areas the global fallback applies.
Check coverage for your site ->Frequently asked questions
What resolution elevation data can I get for my country?
It depends on the open data each country publishes. Denmark offers 0.4m; Scotland, the Netherlands, Luxembourg and Switzerland 0.5m; England, Norway, Estonia, France, Germany, Belgium (Flanders) and Canada 1m; the US 1–10m depending on 3DEP tier; Finland 2m; Czech Republic, Spain and Australia (populated areas) 5m; Italy and Iceland 10m; the rest of Europe 30m; and everywhere else falls back to 90m global coverage.
Where does the elevation data come from?
From national open elevation programmes — USGS 3DEP (US), IGN RGE ALTI (France), Kartverket (Norway), DHM/Terræn via Datafordeler (Denmark), EA LiDAR Composite (England), swissALTI3D (Switzerland), AHN via PDOK (Netherlands), ACT LiDAR (Luxembourg), Geoscience Australia DEM_LiDAR, DHMV II (Geo Vlaanderen, Flanders), and others — plus Copernicus, EU-DTM, ArcticDEM and SRTM for continental and global coverage.
What if my country isn't listed?
Global fallbacks (Copernicus GLO-30 at 30m and SRTM at 90m) cover anywhere on land, so you can always generate terrain even where high-resolution national data isn't published.