hexArea method
Calculates average hexagon area at a given resolution in unit
s
Implementation
@override
double hexArea(int res, H3AreaUnits unit) {
assert(res >= 0 && res < 16, 'Resolution must be in [0, 15] range');
switch (unit) {
case H3AreaUnits.m2:
return _h3c.hexAreaM2(res);
case H3AreaUnits.km2:
return _h3c.hexAreaKm2(res);
}
}