[mkgmap-dev] maxspeed tag vs road_speed preset

Thu May 21 07:51:55 BST 2009

Hi Marco,

the relationship between the maxspeed tag and the road_speed is  
hardcoded in mkgmap. This is reasonable in general, because otherwise  
the style files had to be much larger to cover all the possible  
road_speeds per road. But if you want to use the road_speed in a  
creative way (say for a cycle map) this gets in the way.

The evaluation of the maxspeed tag is implemented in src/uk/me/ 
parabola/mkgmap/osmstyle/StyledConverter.java. The following patch  
will remove it.

Index: StyledConverter.java
===================================================================

--- StyledConverter.java	(revision 1038)
+++ StyledConverter.java	(working copy)
@@ -619,16 +619,8 @@
  			road.setOneway();
  		}

-		// maxspeed attribute overrides default for road type
-		
-		String maxSpeed = way.getTag("maxspeed");
-		int speedIdx = -1;
-		
-		if(maxSpeed != null)
-			speedIdx = getSpeedIdx(maxSpeed);
+		road.setSpeed(gt.getRoadSpeed());

-		road.setSpeed(speedIdx >= 0? speedIdx : gt.getRoadSpeed());
-
  		boolean[] noAccess = new boolean[RoadNetwork.NO_MAX];
  		String highwayType = way.getTag("highway");
  		if(highwayType == null) {

Regards
Thilo


