[mkgmap-dev] multiple garmin elements from one osm element

Sun Jul 19 20:23:25 BST 2009

Is there a big speed difference when using your patches?

I currently have quite some difficulties running extensive checks, as I can
only create maps via remote desktop.
Principally I think many people await this feature.

2009/7/19 Torsten Leistikow <de_muur at gmx.de>

> Moin,
>
> finally I got my eclipse environment running and was able to build
> mkgmap from source. So the next step was my first extension of mkgmap.
>
> Until now a single OSM element was converted into a single garmin
> element, i.e. the first one in the style file with the matching expression.
>
> I have extended the style definition by two commands (stop and
> continue), to allow the
> generation of multiple elements.
>
> A classic conversion rule has a syntax like:
>
> amenity=restaurant [0x2a00 resolution 20]
>
> With my extension this is equal to
>
> amenity=restaurant [0x2a00 resolution 20 stop]
>
> and has the meaning: If this rule is used, no further rules will be
> applied to the element.
>
> If this line is changed now to
>
> amenity=restaurant [0x2a00 resolution 20 continue]
>
> mkgmap will convert a matching OSM element into a garmin Element type
> 0x2a00, but afterwards it will check, whether another rule is matching
> for the same osm element. So this will allow, that for the same item
> additionally a
>
> tourism=hotel [0x2b01 resolution 20]
>
> rule might be applied.
>
> My modification is working on points as well as on lines or polygons,
> i.e. it will also help with barrier=fence problem.
>
> There are two problems with my modification:
>
> 1. The POI generation for an area will not work, with multiple
> conversion rules.
>
> 2. I do not know, how to provide a proper patch for my modification, so
> I just attached the modified java-files (based on mkgmap-r1087).
>
> I hope you can incorporate the modification into your mkgmap and give it
> a try. Without any change to the style, the modification should not
> change anything. As a try, you could add the continue command to all
> point rules and all barrier rules.
>
> What do you think about it?
>
> Gruss
> Torsten
>
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