High Resolution Digital Elevation Model (HRDEM) Mosaic at 1-meter resolution from Natural Resources Canada (NRCan). Indexed from the hrdem-mosaic-1m collection of the NRCan Data Cube STAC API (geo.ca).

Source & method: The HRDEM Mosaic merges many acquisition projects into a single continuous surface (newer data replaces older where they overlap). The 1-meter mosaic corresponds to higher-density airborne lidar (average nominal pulse density ≥ 2 pts/m²), from which both terrain (DTM) and surface (DSM) models are derived. Hillshades are derived products.

Products: DTM (bare earth) and DSM (first surface), plus derived hillshades where available.

Resolution: 1 m ground sample distance.

Coordinate reference: NAD83(CSRS) / Canada Atlas Lambert (EPSG:3979); orthometric elevations in meters on CGVD2013 (EPSG:6647).

Documentation:

Source: NRCan Data Cube STAC API — collection hrdem-mosaic-1m
HRDEM Mosaic dataset record
HRDEM Mosaic product specification (PDF)
NRCan National Elevation Data Strategy

Access

The catalog is browsable without a key. Elevation lookups need a free API key, sent as an X-API-Key header; see the quickstart.

curl "https://api.darly.io/collections/can-nrcan-hrdem-1m/items?limit=5"

curl -H "X-API-Key: $DARLY_API_KEY" \
  "https://api.darly.io/v1/elevation/point?lat=58.2&lon=-96.79&collections=can-nrcan-hrdem-1m"

from pystac_client import Client

catalog = Client.open("https://api.darly.io")
search = catalog.search(collections=["can-nrcan-hrdem-1m"], bbox=[-140.96, 41.68, -52.62, 74.73], max_items=5)
for item in search.items():
    print(item.id, item.assets["dtm"].href if "dtm" in item.assets else item.assets["dsm"].href)

Providers

Natural Resources Canada (NRCan) — producer, licensor, host
Darly — processor

Citation

Natural Resources Canada, High Resolution Digital Elevation Model (HRDEM) Mosaic - 1 m, https://open.canada.ca/data/en/dataset/0fe65119-e96e-4a57-8bfe-9d9245fba06b.