Data description:
Iceland dataset. Two surveys, one from aerial photographs (ap), another one from Hexagon KH-9 Panoramic Camera (KH9PC). Both acquired on the 22nd Aug 1980 in South-Iceland. They cover challenging areas, coastal areas, sand, glaciers and lavas. A high-resolution DEM, in 2x2 m (refdem) is also available in this area.

Data specifications:
Scanned images: TIF, LZW compression
Quickviews: JPG, resized to 20% of original size, with gaussian blur and 85% quality of compression
DEM: GeoTIF, ZSTD compression

Cartographic specifications of reference DEM:
Projection: ISN2016, EPSG:8088.
Proj4 parameters: +proj=lcc +lat_0=65 +lon_0=-19 +lat_1=64.25 +lat_2=65.75 +x_0=2700000 +y_0=300000 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs +type=crs
Vertical accuracy: +/- 0.5 m
Horizontal accuracy: +/- 2 m
More info about the reference DEM available at: https://gatt.natt.is/geonetwork/srv/eng/catalog.search#/metadata/e6712430-a63c-4ae5-9158-c89d16da6361

Access to the data via FTP with Filezilla:
Protocol: FTP
Host: ftp.lmi.is
Encryption: Use explicit FTP over TLS if available
Logon Type: Anonymous
Remote site: /public/joaquin/history/iceland/

Access to the data via HTTPS (manual downloads):
Access through browser: https://ftp.lmi.is/.stm/joaquin/history/iceland/

Folder structure and file size:
|-- ap (4.1G)
|   |-- 1-9337.tif
|   |-- (...)
|   |-- 5-9453.tif
|   `-- quickview
|       |-- 1-9337_qv.jpg
|       |-- (...)
|       `-- 5-9453_qv.jpg
|-- calib_ap (202K)
|   |-- Cam-cal-cert1977-1980.pdf
|   |-- fiducials_iceland1980.fid
|   `-- pseudofiducials_iceland1980.fid
|-- kh9pc (30G)
|   |-- D3C1216-200533A021_a.tif
|   |-- (...)
|   |-- D3C1216-200533F023_j.tif
|   `-- quickview
|       |-- D3C1216-200533A021_a_qv.jpg
|       |-- (...)
|       `-- D3C1216-200533F023_j_qv.jpg
`-- refdem (7.1G)
    |-- IslandsDEMv1.0_2x2m_zmasl_isn2016_58_zmae.tif
    |-- (...)
    `-- IslandsDEMv1.0_2x2m_zmasl_isn2016_82_zmae.tif