DATA PROVENANCE

Sources & coordinates

ArcticDEM Mosaic v4.1

The Thule pilot uses native 10 metre mosaic samples. Elevations are metres above the WGS84 ellipsoid. They are rounded to the nearest whole metre for delivery. Empty source pixels retain the no-data value −32768. These heights need a geoid correction before comparison with mean-sea-level flight altitudes.

Porter, C., Howat, I., Noh, M.J., Husby, E., Khuvis, S., Danish, E., Tomko, K., Gardiner, J., Negrete, A., Yadav, B., Klassen, J., Kelleher, C., Cloutier, M., Bakker, J., Enos, J., Arnold, G., Bauer, G., and Morin, P., 2023. “ArcticDEM – Mosaics, Version 4.1”, Harvard Dataverse, V1. Accessed 3 November 2026. Dataset record.

Elevation data were provided by the Polar Geospatial Center with NSF-OPP support under awards 1043681, 1559691, 1542736, 1810976 and 2129685. PGC provided geospatial support under NSF-OPP awards 1043681, 1559691, 2129685 and 2434541. Product guide · Acknowledgement policy.

Index and surface

H3 resolution 7 addresses each delivery patch. The underlying raster is aligned across cells in EPSG:3413, with a five-sample margin around the cell bounds. The raw output is row-major signed 16-bit little-endian data, west to east and north to south. Sample origins refer to pixel centres. Each cell has its own JSON metadata, SHA-256 checksum and download URL.

Region manifest and original GeoTIFF URLs · H3 · H3 licence · Three.js licence.