[mkgmap-dev] Weird road speed

Sun Jan 19 17:10:21 GMT 2014

Hi,

you can find a rather complete documentation of all mkgmap:* tags in the 
mkgmap style documentation (http://www.mkgmap.org.uk/doc/index.html). 
Please let us know if you miss something.

If you have a problem with a specific way I propose to use the following 
rule in the finalize block of the lines file:

osmid()=227105752 & highway=* { echotags "Wrong roadspeed?" }

This prints out all tags for way 227105752.

WanMil

> Hi,
>
> I have observed weird road speeds when using current mkgmap r2977. See
> this way:
> http://www.openstreetmap.org/way/227105752
>
> It has no maxspeed tag. It should be rendered as primary road, speed
> class 4. This is what I get, if I disable including "roadspeed" file
> from default style.
>
> With "roadspeed" all is different and depends on tile area. I have
> prepared sample data, where this road get speed class 6. Croping a bit
> tile area (outside the road) changes speed class to 3. See picture
> showing both cases, dark blue is class 6, green is class 3:
> http://files.mkgmap.org.uk/download/173/speed-problem.png
>
> I have prepared an example of source data:
> http://files.mkgmap.org.uk/download/172/speed-problem.7z
>
> It contains source data and a poly file for cropping. I have included
> batches, that I have used for creating maps.
>
> Actually I'm not sure, what is the behavior of mkgmap:road-speed-class
> tag. I couldn't find any description. For example if I define a road
> like [0x03 road_class=3 road_speed=4 resolution 19], does it create
> mkgmap:road-speed-class=4?
>