Sanity check for areas of estimated tongfen correspondence. This is useful if for example the total extent of geo1 and geo2 differ and there are regions at the edges with large difference in overlap.
check_tongfen_single_areas(geo1, geo2, correspondence)
input geometry 1 of class sf
input geometry 2 of class sf
Correspondence table between `geo1` and `geo2` as e.g. returned by `estimate_tongfen_correspondence`.
A table with columns `TongfenID`, `area1` and `area2`, where each row corresponds to a unique `TongfenID` from them `correspondence` table and the other columns hold the areas of the regions aggregated from `geo1` and `geo2`.`