Find Observations in an area defined by a center point (GPS coordinates) and a radius (in kilometers)

From this Journal post:
https://www.inaturalist.org/posts/13649-restricting-identify-to-a-bounding-box

Example of a circle from the post's text:
https://www.inaturalist.org/observations?radius=.5&lat=32.2150262&lng=-98.2533024

My attempts:
The center of the circle is the pond at the Brecksville Reservation Maintenance Center:

https://www.inaturalist.org/observations?radius=.5&lat=41.310906&lng=-81.621410

GPS coordinates using Google Maps:
41.310906
-81.621410

Publicado el 26 de septiembre de 2022 a las 02:35 PM por ken_ohio