Planetary Computer - open source terrain data and land cover plus more

Came across Planetary Computer today and found it has a good variety of data sets that could be useful for radio planning apps i.e. terrain data from ALOS, Copernicus, SRTM. Land cover via ESRI and ESA plus more.
It won't be as accurate as some of the paid data, but likely will do for some people.
Use this link , click on "Select a dataset to visualize" then browse through them to see what they offer.

For QGIS users, there is a plugin to make it easy to obtain data.
This page has details for using GDAL to get the data. Website also has details for using Python and R.