Is that first tool available to use somewhere? Looks like it was just a short-lived academic research paper and not something that was actually publicly released. I would love to try it out myself!
Walking is my favorite way to get to know a new city, and it not always easy to determine a good way to walk by eyeballing google maps if you’re not yet familiar with a new city.
The tool in the screenshot is https://maps.openrouteservice.org/. The greenery/noise filters are available there, but only for Germany. It is indeed an academic project, but is actively developed.
Disclosure: Author of trailrouter.com, which uses openrouteservice under the hood, but has its own algorithm for determining green/natural spaces to run in.
Walking is my favorite way to get to know a new city, and it not always easy to determine a good way to walk by eyeballing google maps if you’re not yet familiar with a new city.