Geometries touching the edge
What changes in Geometries touching the edge compared with MongoDB and what your application has to do.
This difference is of the Not guaranteed by MongoDB kind.
What MongoDB does
A geometry that only touches the edge of the query shape counts as inside or outside depending on rounding.
What TeselaDB does
It always counts as inside for $geoWithin and as an intersection for $geoIntersects, also within 10⁻¹⁵ radians of the edge.
What your application has to do
Nothing, unless you rely on the case MongoDB gives as outside; then exclude the edge in your query.