Elevation Data (DEM)

Shuttle Radar Topography Mission (SRTM)

For more information see: https://wiki.openstreetmap.org/wiki/SRTM

How to download the SRTMGL1 data set (1 arc-second global)

1. Go to https://earthexplorer.usgs.gov/ and register/sign in
2. Select the area to download (click on the map to draw a polygon)
3. Click "Data Sets"
4. Check "Digital Elevation" -> "SRTM" -> "SRTM 1 Arc-Second Global"
5. Click "Results"
6. Click "Show Result Controls", then check "Add All Results From Current Page to Bulk Download"
7. Click "View Item Basket"
8. Click "Proceed To Checkout"
9. Click "Submit Order"
10. Follow the instructions to download the files using the Bulk Downloader Application (requires Java <9)
11. Unzip all downloaded files into a single folder (e.g. find . -name '*.zip' -exec unzip {} \;)
12. Use this folder for preproccesing: ppr-preprocess [...] --dem <folder>

See also: https://www.researchgate.net/post/Does_anybody_know_a_ftp-adress_where_we_can_download_SRTM1_data_30m_for_entire_Africa_3000_tiles

Other sources

PPR supports the EHdr file format:

• https://gdal.org/drivers/raster/ehdr.html
• http://desktop.arcgis.com/en/arcmap/10.3/manage-data/raster-and-images/bil-bip-and-bsq-raster-files.htm
• http://downloads.esri.com/support/whitepapers/other_/eximgav.pdf

gdal_translate can be used to convert other file formats into EHdr.