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Calculate the real route length for classification

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This commit is contained in:
Patrick Niklaus
2015-02-12 11:44:52 +01:00
parent 38d7db49c8
commit b3fa03043d
2 changed files with 22 additions and 34 deletions
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plugins/map_matching.hpp
+5 -11
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@@ -72,16 +72,9 @@ template <class DataFacadeT> class MapMatchingPlugin : public BasePlugin
const std::string GetDescriptor() const final { return descriptor_string; }
TraceClassification classify(double trace_length, const std::vector<PhantomNode>& matched_nodes, int removed_points) const
TraceClassification classify(float trace_length, float matched_length, int removed_points) const
{
double matching_length = 0;
for (const auto current_node : osrm::irange<std::size_t>(0, matched_nodes.size()-1))
{
matching_length += coordinate_calculation::great_circle_distance(
matched_nodes[current_node].location,
matched_nodes[current_node + 1].location);
}
double distance_feature = -std::log(trace_length) + std::log(matching_length);
double distance_feature = -std::log(trace_length) + std::log(matched_length);
// matched to the same point
if (!std::isfinite(distance_feature))
@@ -189,11 +182,12 @@ template <class DataFacadeT> class MapMatchingPlugin : public BasePlugin
// call the actual map matching
JSON::Object debug_info;
float matched_length;
std::vector<PhantomNode> matched_nodes;
search_engine_ptr->map_matching(candidates_lists, input_coords, matched_nodes, debug_info);
search_engine_ptr->map_matching(candidates_lists, input_coords, matched_nodes, matched_length, debug_info);
// classify result
TraceClassification classification = classify(trace_length, matched_nodes, input_coords.size() - matched_nodes.size());
TraceClassification classification = classify(trace_length, matched_length, input_coords.size() - matched_nodes.size());
if (classification.first == ClassifierT::ClassLabel::POSITIVE)
{
json_result.values["confidence"] = classification.second;