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Make POI tag ranking deterministic and rank-aware #889

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c34081d
Make POI tag ranking deterministic
Symmetricity May 13, 2026
23a481c
Pick best-ranked POI match
Symmetricity Jun 4, 2026
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11 changes: 8 additions & 3 deletions resources/process-debug.lua
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Original file line number Diff line number Diff line change
Expand Up @@ -155,6 +155,7 @@ poiTags = { aerialway = Set { "station" },
sport = Set { "american_football", "archery", "athletics", "australian_football", "badminton", "baseball", "basketball", "beachvolleyball", "billiards", "bmx", "boules", "bowls", "boxing", "canadian_football", "canoe", "chess", "climbing", "climbing_adventure", "cricket", "cricket_nets", "croquet", "curling", "cycling", "disc_golf", "diving", "dog_racing", "equestrian", "fatsal", "field_hockey", "free_flying", "gaelic_games", "golf", "gymnastics", "handball", "hockey", "horse_racing", "horseshoes", "ice_hockey", "ice_stock", "judo", "karting", "korfball", "long_jump", "model_aerodrome", "motocross", "motor", "multi", "netball", "orienteering", "paddle_tennis", "paintball", "paragliding", "pelota", "racquet", "rc_car", "rowing", "rugby", "rugby_league", "rugby_union", "running", "sailing", "scuba_diving", "shooting", "shooting_range", "skateboard", "skating", "skiing", "soccer", "surfing", "swimming", "table_soccer", "table_tennis", "team_handball", "tennis", "toboggan", "volleyball", "water_ski", "yoga" },
tourism = Set { "alpine_hut", "aquarium", "artwork", "attraction", "bed_and_breakfast", "camp_site", "caravan_site", "chalet", "gallery", "guest_house", "hostel", "hotel", "information", "motel", "museum", "picnic_site", "theme_park", "viewpoint", "zoo" },
waterway = Set { "dock" } }
poiTagKeys = { "aerialway", "amenity", "barrier", "building", "highway", "historic", "landuse", "leisure", "railway", "shop", "sport", "tourism", "waterway" }

-- POI "class" values: based on https://github.com/openmaptiles/openmaptiles/blob/master/layers/poi/poi.yaml
poiClasses = { townhall="town_hall", public_building="town_hall", courthouse="town_hall", community_centre="town_hall",
Expand Down Expand Up @@ -502,16 +503,21 @@ end
-- returns rank, class, subclass
function GetPOIRank(obj)
local k,list,v,class,rank
local bestRank,bestClass,bestSubclass

-- Can we find the tag?
for k,list in pairs(poiTags) do
for _,k in ipairs(poiTagKeys) do
list = poiTags[k]
if list[Find(k)] then
v = Find(k) -- k/v are the OSM tag pair
class = poiClasses[v] or v
rank = poiClassRanks[class] or 25
return rank, class, v
if not bestRank or rank<bestRank then
bestRank,bestClass,bestSubclass = rank,class,v
end
end
end
if bestRank then return bestRank,bestClass,bestSubclass end

-- Catch-all for shops
local shop = Find("shop")
Expand All @@ -535,4 +541,3 @@ function split(inputstr, sep) -- https://stackoverflow.com/a/7615129/4288232
end
return t
end

12 changes: 9 additions & 3 deletions resources/process-openmaptiles.lua
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Original file line number Diff line number Diff line change
Expand Up @@ -258,6 +258,7 @@ poiTags = { aerialway = Set { "station" },
sport = Set { "american_football", "archery", "athletics", "australian_football", "badminton", "baseball", "basketball", "beachvolleyball", "billiards", "bmx", "boules", "bowls", "boxing", "canadian_football", "canoe", "chess", "climbing", "climbing_adventure", "cricket", "cricket_nets", "croquet", "curling", "cycling", "disc_golf", "diving", "dog_racing", "equestrian", "fatsal", "field_hockey", "free_flying", "gaelic_games", "golf", "gymnastics", "handball", "hockey", "horse_racing", "horseshoes", "ice_hockey", "ice_stock", "judo", "karting", "korfball", "long_jump", "model_aerodrome", "motocross", "motor", "multi", "netball", "orienteering", "paddle_tennis", "paintball", "paragliding", "pelota", "racquet", "rc_car", "rowing", "rugby", "rugby_league", "rugby_union", "running", "sailing", "scuba_diving", "shooting", "shooting_range", "skateboard", "skating", "skiing", "soccer", "surfing", "swimming", "table_soccer", "table_tennis", "team_handball", "tennis", "toboggan", "volleyball", "water_ski", "yoga" },
tourism = Set { "alpine_hut", "aquarium", "artwork", "attraction", "bed_and_breakfast", "camp_site", "caravan_site", "chalet", "gallery", "guest_house", "hostel", "hotel", "information", "motel", "museum", "picnic_site", "theme_park", "viewpoint", "zoo" },
waterway = Set { "dock" } }
poiTagKeys = { "aerialway", "amenity", "barrier", "building", "highway", "historic", "landuse", "leisure", "railway", "shop", "sport", "tourism", "waterway" }

-- POI "class" values: based on https://github.com/openmaptiles/openmaptiles/blob/master/layers/poi/poi.yaml
poiClasses = { townhall="town_hall", public_building="town_hall", courthouse="town_hall", community_centre="town_hall",
Expand Down Expand Up @@ -842,10 +843,12 @@ end
-- Calculate POIs (typically rank 1-4 go to 'poi' z12-14, rank 5+ to 'poi_detail' z14)
-- returns rank, class, subclass
function GetPOIRank()
local k,list,v,class,rank
local k,list,v,class,rank,subclassKey
local bestRank,bestClass,bestSubclass

-- Can we find the tag?
for k,list in pairs(poiTags) do
for _,k in ipairs(poiTagKeys) do
list = poiTags[k]
if list[Find(k)] then
v = Find(k) -- k/v are the OSM tag pair
class = poiClasses[v] or k
Expand All @@ -855,9 +858,12 @@ function GetPOIRank()
class = v
v = Find(subclassKey)
end
return rank, class, v
if not bestRank or rank<bestRank then
bestRank,bestClass,bestSubclass = rank,class,v
end
end
end
if bestRank then return bestRank,bestClass,bestSubclass end

-- Catch-all for shops
local shop = Find("shop")
Expand Down
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