set the magic number to -1

source/georef/georef.cpp

@@ -698,11 +698,10 @@ edge_t GeoRef::nearest_edge(const type::GeographicalCoord& coordinates,
     float min_dist = 0., cur_dist = 0.;
     double coslat = ::cos(coordinates.lat() * type::GeographicalCoord::N_DEG_TO_RAD);
 
-    // Magic Number!
-    // The number indicates the number of nearest vertices that should be returned by find_with
-    // This number is determined by balancing the performance and the practical results (Artemis)
-    // The bigger the number is, the better the projection will be and slower it will run.
-    constexpr int nb_nearest_vertices = 50;
+    // TODO: set different nb for different modes
+    // we can set -1 for both walking and bike mode
+    // set smaller number (ex: 50) for car
+    constexpr int nb_nearest_vertices = -1;
 
     for (const auto& u : prox.find_within<proximitylist::IndexOnly>(coordinates, horizon, nb_nearest_vertices)) {
         BOOST_FOREACH (const edge_t& e, boost::out_edges(u, graph)) {