Add support for non-numerical units in car profile for maxheight #4763

profiles/lib/measure.lua

@@ -55,11 +55,24 @@ function Measure.parse_value_kilograms(value)
   end
 end
 
+-- default maxheight value defined in https://wiki.openstreetmap.org/wiki/Key:maxheight#Non-numerical_values
+local default_maxheight = 4.5
+-- Available Non numerical values equal to 4.5; below_default and no_indications are not considered
+local height_non_numerical_values = Set { "default", "none", "no-sign", "unsigned" }
+
 --- Get maxheight of specified way in meters. If there are no
 --- max height, then return nil
-function Measure.get_max_height(raw_value)
+function Measure.get_max_height(raw_value,way)
   if raw_value then
-    return Measure.parse_value_meters(raw_value)
+    if height_non_numerical_values[raw_value] then
+      if way then
+        return way:get_location_tag('maxheight') or default_maxheight
+      else
+        return default_maxheight
+      end
+    else
+      return Measure.parse_value_meters(raw_value)
+    end
   end
 end
 

profiles/lib/way_handlers.lua

@@ -465,8 +465,8 @@ end
 function WayHandlers.handle_height(profile,way,result,data)
   local keys = Sequence { 'maxheight:physical', 'maxheight' }
   local forward, backward = Tags.get_forward_backward_by_set(way,data,keys)
-  forward = Measure.get_max_height(forward)
-  backward = Measure.get_max_height(backward)
+  forward = Measure.get_max_height(forward,way)
+  backward = Measure.get_max_height(backward,way)
 
   if forward and forward < profile.vehicle_height then
     result.forward_mode = mode.inaccessible