[mkgmap-dev] [PATCH v1] Thin out builtin-tag-list

Tue Apr 12 21:51:50 BST 2011

>> Actually, one question related to this patch.
>>
>> I currently delete all motorcar, motorcycle, emergency, and so on tags
>> via the style-file. Could I instead just remove them from the built-in
>> tag list and thereby make the map quicker to build?
>> (I will set new values for them, but would prefer them not to be read in
>> at all)
>
> I am not sure if it's really the same. At least the HighwayHook that
> runs before the style is applied use these tags to configure the road
> exceptions. So if you remove it via style the exceptions seems to be
> already set.
>
> If you don't want to have it, you could better remove the tags from the
> built-in-tag list file but you must ensure that these tags are not
> referenced in one of your style file.
>

There is also an extra mkgmap option:
--delete-tags-file=FILENAME
         Names a file that should contain one or more lines of the form
         TAG=VALUE or TAG=*. Blank lines and lines that start with
         # or ; are ignored. All tag/value pairs in the OSM input are
         compared with these patterns and those that match are deleted.

This is the best way to be sure that a specific tag is not loaded from file.

WanMil