Copernicus DEM

nominal 90 m, 30 m, 10 m (actually arc second spacing)
30 m and 90 m freely available. The intention of the f&o license negotiated with Airbus (see here pages 15-17) was to come as close as possible to the general Copernicus licensing policy, which in a few words means: after registration as a user and acceptance (Art. 1) you can essentially do with the data what you want (Art. 4) as long as you ackowledge the source (Art. 6).
Avoid the DTED version (integer is much worse than floating point elevations)
Validation report: https://spacedata.copernicus.eu/documents/20126/0/GEO1988-CopernicusDEM-RP-001_ValidationReport_V1.0.pdf/edc88601-897e-82df-5604-b6b60cbecb57?t=1586527010843
AIRBUS (2020) Copernicus DEM: Copernicus Digital Elevation Model Product Handbook RFP/RFI-No.: AO/1-9422/18/I-LG, Version: 2.1. Available online at https://spacedata.copernicus.eu/documents/20126/0/GEO1988-CopernicusDEM-SPE-002_ProductHandbook_I1.00.pdf/082dd479-f908-bf42-51bf-4c0053129f7c?t=1586526993604
https://spacedata.copernicus.eu/fr/dataset-details?articleId=394198

EU LAEA DEM

Precursorto Copernicus
https://ec.europa.eu/eurostat/web/gisco/geodata/reference-data/elevation/eu-dem/eu-dem-laea
Multi-GB zip files, which uncompress to a multi-GB tiff, which QGIS did not much like
The LAEA projection is not very standard
Probably only useful if you absolutely need a DEM in this projection (to map our EU data)

The names for the DEMs have a lot of variability.

?CPP10_DGED? and ?CPP10_DTED? are the Package names for version 2019 of the 30m product

?CPP30_DGED 20? and ?CPP30_DTED 20? are the Package names for version 2020 of the 30m product

The 2020 version substitutes the 2019 version. Use 2020 always where available. Discrepancies between both versions are not due to time update, but to improvements in the product.

Determining the version is not easy.

This is changing very rapidly, and might not be current. The suggestions are based on my personal experience, and hopefully the download will get easier.

The easiest way to get the Copernicus, though not without some caveats, is from OpenTopography (Directions)

The tile level metadata will be stripped out. For most users, this will not be significant, because the metadata is hard to use.
The overlapping rows and columns will be stripped out. For most users, this will not be signifcant.
Raster bulk downloads use AWS command line. If you want the complete data set and have the disk space and download capacity, this is the best option at present.
Graphical selection browser
- For the latitudes where the longitudinal spacing changes from 1", the data will be reinterpolated when you use the cookie cutter option. This will affect some options, like slope.
- File names are not helpful
- Limit to size

AWS had the COP data, at https://registry.opendata.aws/copernicus-dem/

It has 3600x3600 pixels in the 1" data, trimming the overlap rows and columns
It has 3600x3600 pixels at all latitudes, meaning elevations have been interpolated.
It says it is pixel-is-area
It shifts the origin a half pixel in each direction
This is some but not all of the changes done by Open Topography (above)

Downloads at https://finder.creodias.eu/ this is current as of 6/30/2021

login with user account
Pick collection (COP-DEM), Instance (GLO-30), and Product Type (DGED_PUBLIC)
Select polygon
Search products
Download directions: https://creodias.eu/-/how-to-order-products-using-finder-api- (all Greek to me)
Download options
- One at a time, so this is only feasible for small areas
- Zip names look like: DEM1_SAR_DGE_30_20110423T040654_20121013T041307_ADS_000000_kTTf.DEM.zip which are more or less random from what I see
- Unzipping gets folder that looks like: Copernicus_DSM_10_S27_00_E019_00, which has the location of the SW corner
- The DEM itself will be "Copernicus_DSM_10_S27_00_E019_00_DEM.tif", about 50 MB for the 1 sec DEM, in a folder with a total size of about 104 MB.
- Copy as paths/urls does not produce an ASCII result
- Add to cart option is not available

Everything below here may or may not still be valid. It is still here in case things change (again) and you have to go looking. I look forward to deleting this because the access has become simple, but until then this might be helpful

ftp issues: https://spacedata.copernicus.eu/fr/blogs/-/blogs/ftp-client-configuration-for-accessing-copernicus-dem-datasets?_com_liferay_blogs_web_portlet_BlogsPortlet_redirect=%2Fweb%2Fcscda%2Fexplore-more%2Foperational-news-archive
The main entry point to the data is the Copernicus Space Component Data Access PANDA Catalogue: https://panda.copernicus.eu/ which has a graphical interface. You can download indiviudal files, but you must be careful to figure out which files you want and can only see a few at a time.
3" data only
- https://ec.europa.eu/eurostat/web/gisco/geodata/reference-data/elevation/copernicus-dem/elevation has 10x10 degree tiles of the 3" data for download from a graphical interface
- https://gisco-services.ec.europa.eu/dem/copernicus/ has two folders with the 3" data in 10x10 degree tiles. outD has the DEMs, and outA auxialliary data. You can get the text of the web pages, which has the relative paths to all the data, combine that with web address, and then do a bulk download. Files named like 10_DEM_y-10x-20.zip
Data ftp: cdsdata.copernicus.eu
- Requires account
- DEM in 4 folders, 90 m and 30 m, DGED (float) and DTED (integer, so file size halved, but computations will be compromised)
- Folders by continent and country
- Files names not helpful, but you can download an entire folder
- To get a small number of files
  - Download mapping.csv files in each folder (disregard reported 0 file size)
  - Fix in Excel.
    - Field delimiter is ;
    - Need to replace S, W with - in lat, long
    - Need to remove N, E in lat long
  - Import as DB
  - Filter to desired area
  - export just the URL field as a text file
  - remove the first line in the export
  - Use the list of files to download, Chrome option. You will have to enter your account and password. You have to accept the download of each individual file, so this is painful for many files.
- Data in Tar files, with a complex directory structure and many metadata files. Option on the Compress/Decompress form to extract just the TIFF files.

A few things I hope are helpful:

b) you need (as for any Copernicus data access) a registration. Once you have that a reasonable explanantion about how to get especially ftp access (which most of us will want) is here:
https://spacedata.copernicus.eu/documents/20126/0/Data+Discovery+and+Download+Guidelines+%288%29.pdf/21fceff1-b0ca-2eea-7e48-8834a196de75?t=1581501037557 c) further useful links regarding license, product handbook etc are here:

https://spacedata.copernicus.eu/fr/web/cscda/blogs/-/blogs/copernicus-dem-30-meter-dataset-now-publicly-available?_com_liferay_blogs_web_portlet_BlogsPortlet_redirect=%2Ffr%2Fhome

https://spacedata.copernicus.eu/fr/web/cscda/blogs/-/blogs/copernicus-dem-30-meter-dataset-now-publicly-available

https://spacedata.copernicus.eu/fr/web/cscda/data-access/registration

Other Key Global Regional DEMs

Last revision 1/2/2022