anchor.diff:      ?assertEqual(111412, round(latitudinal_width(60))),
       ?assertEqual(111694, round(latitudinal_width(90))).
   
  +
  +longitudinal_width_test() ->
  +    ?assertEqual(111319, round(longitudinal_width(0))),
  +    ?assertEqual(107550, round(longitudinal_width(15))),
  +    ?assertEqual(78847, round(longitudinal_width(45))),
  +    ?assertEqual(55800, round(longitudinal_width(60))),
  +    ?assertEqual(0, round(longitudinal_width(90))).
  +
   -endif.
  
positive.code: 
  % Multiplier to convert degrees to radians
  -define(DEGREES_TO_RAD, 0.017453292519943295).
  
  % Queries within a box, since the box is provided already, no adjustment
  % is necessary
  
negative.code: %%%
  -module(teles_geo_query).
  -export([query_within/2, query_around/3, query_nearest/3,
           distance/2, latitudinal_width/1, longitudinal_width/1]).
  -include_lib("rstar/include/rstar.hrl").
  
  -ifdef(TEST).
  