Hi Fernando & Greg You need to use the maxspeedkph() or maxspeedmph() function to read the OSM maxspeed tag as it understands values like "30 mph". Then, following Greg's idea that you should use maxspeed:practical if set and the that logic to compare speeds is going to be very tricky, just have following near the start of inc/roadspeed: maxspeed:advisory=* {set maxspeed='${maxspeed:advisory}'} maxspeed:practial=* {set maxspeed='${maxspeed:practial}'} It also needs something at the end to limit motorways for most countries: highway=motorway & mkgmap:road-speed-max!=* & mkgmap:country!=DEU {set mkgmap:road-speed-max=6} Ticker On Wed, 2020-07-08 at 10:57 -0400, Greg Troxel wrote:
Fernando Trebien <fernando.trebien@gmail.com> writes:
maxspeed:practical=* & maxspeed=* & maxspeed:practical < $maxspeed { set maxspeed='${maxspeed:practical}' }
Not really bearing on your particular problem, but I don't think checking with < makes sense. If maxspeed:practical is set, it represents the speed that people actually can reasonably drive.
It can be that this practical, socially acceptable speed is higher than the limit. There is a road around me that is built almost like an interstate but has an inexplicable 45 mph speed limit. Traffic normally flows at 70 mph. Anyone going 45 mph is really in the way to the point of being dangerous, and people might call the police to report an impaired driver.
So if practical is higher, use it. Which means "if practical is set, use it". _______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev