Can you write a short documentation for this method? I do not know your application context, but I wonder if we can change the parameter to ```GeoLib::Point const&```? Maybe it is possible to change the signature of ```isPntInSfc()```, too? 

In generell there is a mixture between "old" arrays and "new" GeoLib::Point in GeoLib interfaces. This mixture has historical reasons. What is your opinion: Should we address this in another PR?