I've been working on opentopodata.org as a free, open alternative to the Google Maps Elevation API.
Request URLs look like this:
and the response is similar to Google Maps:
YAddress (made by the company I work for) can geocode batches of address with city-state lines only, without the street lines. It is free for small batches and paid for large ones.
For each city you get coordinates of the city centroid, with is an imaginary center of mass of the city area.
Please take a look at SAGA GIS (System for Automated Geoscientific Analyses). If you install QGIS 3.10 it will automatically install SAGA GIS as an integrated processing tool. Saga GIS comes with a couple of Kriging methods.
I have no seen the term Empirical Bayesian Kriging but you might find something that might be of interest.
In addition, there is ...
Try using Paint.NET.
As of my last testing (GIMP, Affinity, Photoshop), this is the only "traditional" image editing software to properly preserve GeoTIFF metadata. Be aware that at current, not all bit-depths found in GeoTIFFs are supported, but "major" ones are (32bit, 24bit, 16bit, etc).
Fixed: EXIF metadata of type Float and Double are now ...