Home โบ iDSM
๐ท Image-based surface models (iDSM) worldwide
The image-based surface model (iDSM) at its native resolution (mostly 20 cmโ1 m) per state โ this catalogue lists file URL and acquisition date, the download comes directly from the responsible state agency. Unlike a laser DSM, iDSM is produced by image matching from overlapping orthophotos (DOP) โ no separate survey flight, but the same aerial images photogrammetrically computed into an elevation model. Averaged to 1 m, iDSM is already part of the unified DSM1. Currently in Germany 143,530 download links.
Each row links to the server of the responsible state; there is no copy of the raster data here.
๐ช๐บ Europe
Outside Germany we deliver nothing ourselves but link the open tiles directly at the source โ the map shows the link list as soon as the rectangle lies over the country. Each country has its own page with source and licence; all countries at a glance under Europe.
| Country | Content | Files | Flown | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ๐ฆ๐น Austria | Styria iDSM 0.5 m from the 2020โ23 image flights, uncompressed GeoTIFF (about 100 MB) per 2.5 km sheet in MGI/Gauss-Krรผger, heights above the Adriatic datum. | 7,091 | 2020โ2023 | ||||||||||||||||||||||||
| ๐จ๐ฟ Czechia | ฤรZK DMPOK, 0.5 m, GeoTIFF in a ZIP, 2 km tiles in EPSG:3045. | 20,308 | 2024โ2025 | ||||||||||||||||||||||||
| ๐ซ๐ท France | IGN MNS Correl from the BD ORTHO aerial images, 0.5 m, GeoTIFF in EPSG:2154 โ one 7z package per dรฉpartement and year, split into 4 GB parts. | 228 | 2016โ2026 | ||||||||||||||||||||||||
| ๐ฉ๐ช Germany | Image-based surface models of the states, each tile directly from the state | 270,270 | 2021โ2026 | ||||||||||||||||||||||||
7 states
| |||||||||||||||||||||||||||
| ๐ฎ๐ช Ireland | GSI photogrammetric DSM 25 cm at 25 coastal sites (2020โ21), ZIP in EPSG:2157. | 25 | 2019โ2021 | ||||||||||||||||||||||||
| ๐ฎ๐น Italy | Tuscany iDSM 2021 from image matching, 1 m, ASCII grid per 1:5,000 element in EPSG:7791. | 2,726 | 2021 | ||||||||||||||||||||||||
| ๐ณ๐ฑ Netherlands | Kadaster DSM from the stereo aerial images, 20 cm as gridded LAZ per 250 m tile in EPSG:28992. | 623,657 | 2025 | ||||||||||||||||||||||||
| ๐ช๐ธ Spain | Catalonia iDSM 1 m from image matching, yearly 2018โ2024 as one region-wide GeoTIFF each (86โ159 GB) in EPSG:25831. | 7 | 2018โ2024 | ||||||||||||||||||||||||
| ๐จ๐ญ Switzerland | No current iDSM; under history the WSL surface models 1979โ2006 from scanned black-and-white aerial photos, 1 m, ONE countrywide cloud-optimized GeoTIFF (about 110 GB) per epoch in EPSG:2056. | 4 | 1985โ2006 | ||||||||||||||||||||||||
๐ North America
Outside Germany we deliver nothing ourselves but link the open tiles directly at the source โ the map shows the link list as soon as the rectangle lies over the country. Each country has its own page with source and licence; all countries at a glance under North America.
| Country | Content | Files | Flown | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ๐จ๐ฆ Canada | Ontario DSM 0.5 m from image correlation of the provincial flights 2013โ2022, ZIP packages (1โ3 GB) with 1 km tiles, older flights in southern Ontario under history; in the north ArcticDEM from satellite stereo images 2011โ2021, 2 m, per 50ร50 km tile in EPSG:3413, ellipsoidal heights. | 2,742 | 2013โ2022 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
10 provinces and territories
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| ๐ฒ๐ฝ Mexico | INEGI surface models from satellite stereo (1.5 m) and from satellite or aerial images (5 m), ZIP per 1:10,000 map sheet. | 20,782 | 2006โ2026 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
32 states
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| ๐บ๐ธ USA | Indiana 2025, 1 ft, cloud-optimized GeoTIFF per 2,500 ft tile (by all indications from the aerial imagery, the method is not documented); Alaska: DGGS structure from motion 3โ20 cm as ZIP per project (partly historical from 1951) and ArcticDEM 2 m from satellite stereo, COG in EPSG:3413 (mosaic and individual acquisitions with capture date). | 256,158 | 2008โ2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
2 states
| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
What is included?
- Download link โ directly to the file at the state
- Acquisition date โ where supplied by the source
- Ground resolution โ 20 cmโ1 m depending on the state
Origin: image matching from overlapping DOP orthophotos, not laser scanning โ iDSM is therefore slightly less accurate at edges (roofs, trees) than a true laser DSM, but available wherever orthophotos exist.
Difference from the DSM1: the DSM1 is a unified 1 m grid across all of Germany, this catalogue links iDSM at the native resolution of the respective state source.
Data status per state: see the data status overview (German).