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Uses parsed len(turn:lanes) to fixup number of lanes, resolves #4472

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This commit is contained in:
Daniel J. Hofmann
2017-09-04 16:14:35 +02:00
committed by Daniel J. H
parent c37a8ddd83
commit d7bcafcb59
2 changed files with 54 additions and 12 deletions
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src/extractor/extractor_callbacks.cpp
+25 -12
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@@ -287,23 +287,36 @@ void ExtractorCallbacks::ProcessWay(const osmium::Way &input_way, const Extracti
return lane_description;
};
// convert the lane description into an ID and, if necessary, remember the description in the
// description_map
const auto requestId = [&](const std::string &lane_string) {
if (lane_string.empty())
return INVALID_LANE_DESCRIPTIONID;
TurnLaneDescription lane_description = laneStringToDescription(std::move(lane_string));
return lane_description_map.ConcurrentFindOrAdd(lane_description);
};
// If we could parse turn lanes but could not parse number of lanes,
// count the turn lanes and use them for the way's number of lanes.
auto road_classification = parsed_way.road_classification;
std::uint8_t road_deduced_num_lanes = 0;
// Deduplicates street names, refs, destinations, pronunciation, exits.
// In case we do not already store the key, inserts (key, id) tuple and return id.
// Otherwise fetches the id based on the name and returns it without insertion.
const auto turn_lane_id_forward = requestId(parsed_way.turn_lanes_forward);
const auto turn_lane_id_backward = requestId(parsed_way.turn_lanes_backward);
auto turn_lane_id_forward = INVALID_LANE_DESCRIPTIONID;
auto turn_lane_id_backward = INVALID_LANE_DESCRIPTIONID;
const auto road_classification = parsed_way.road_classification;
// RoadClassification represents a the class for unidirectional ways,
// therefore we need to add up deduced forward and backward lane counts.
if (!parsed_way.turn_lanes_forward.empty())
{
auto desc = laneStringToDescription(parsed_way.turn_lanes_forward);
turn_lane_id_forward = lane_description_map.ConcurrentFindOrAdd(desc);
road_deduced_num_lanes += desc.size();
}
if (!parsed_way.turn_lanes_backward.empty())
{
auto desc = laneStringToDescription(parsed_way.turn_lanes_backward);
turn_lane_id_backward = lane_description_map.ConcurrentFindOrAdd(desc);
road_deduced_num_lanes += desc.size();
}
road_classification.SetNumberOfLanes(std::max(road_deduced_num_lanes, // len(turn:lanes)
road_classification.GetNumberOfLanes()));
// Get the unique identifier for the street name, destination, and ref
const auto name_iterator = string_map.find(MapKey(parsed_way.name,