Here a reduced example. You can see if it does what you are looking for
polygon test 03.xlsx (19.2 KB)
There is a Enketo problem, see below.
I only found this workaround, see example. In Preview only this seems working
concat(${location2}, "; ", ${location3}, "; ", ${location4}, "; ", ${location5}). You get an open polygon, which can be closed.
At the end, I added an example, to illustrate the KoBo/ODK syntax of geopoint, geotrace and geoshape.
Maybe you could explain what you exactly want to do? You don’t get a circle, just a rectangle area.
If you want to make sure that a selected household is in a given area there might be another approach, previously discussed in the forum.
I am not an GPS expert. But I think you could also calculate a validate area with moving latitude or longitude for a 100 m distance from the center point, for the 4 points entered now manually.
Here the pending Enketo problem (also visible in ODK Validation Preview!):
https://community.kobotoolbox.org/t/problem-with-gps-shape-and-line-modification-in-enketo/16028/26.
@Xiphware @Kal_Lam @martijnr ? Can you help more, please? What is the status? Is there a github ticket?