[Spatial] Declaring a metric problem

[Taylor, W. <tay...@se...>]

Hello,

We are trying to find  the 5 closest spots from a given longitude and latitude. And we are getting a undefined reference.
This is our struct that we defined for our metric

typedef spatial::point_multiset<2, coord,
                              spatial::accessor_less<coord_acc, coord>> tree;

typedef double distance_type; //[1]
                              double
                              distance_to_key(dimension_type rank,
                              const coord& origin, const coord& key) const; //[2], [4]

                              double
                              distance_to_plane(dimension_type rank, dimension_type dim,
                              const coord& origin, const coord& key) const; //[3],[4]

                              double distance_to_plane(dimension_type rank, dimension_type dim,
                              const coord& origin, const coord& key) {
                                             return 0.0;
                              }

                              double distance_to_key(dimension_type rank,
                              const coord& origin, const coord& key) {
                                             distance_type distance;
                                             distance = getDistance(origin.lat, origin.lon, key.lat, key.lon, 'M');
                                             return distance;

                              }
               };

               This is how we call the neighbor iterator
neighbor_iterator<tree, guacMet> iter = neighbor_begin(container, metric, target);

I do not know hwy we are getting a undefined reference to guacMet.distance_to_plane and guacMet_distance_to_key

Any help would be greatly appreciated.

Thank you
Wes