> <
https://lh4.googleusercontent.com/-jTGKNzLyq_U/TyohAGBJPiI/AAAAAAAAAA...>
> anybody knows how to make a polygon with this?
It's a picture. Can't make a polygon out of that.
If you want to make a polygon out of the markers shown, you would need
access to the location data for those markers. Do you want a single
polygon that encloses them all? "Convex hull" algorithm is used for
that.