Style functions

In a mkgmap style, you can now do more than just test the values of tags.

length()

Gives the length of a way in meters. This can be used to omit short driveways and the like.

    highway=residential & access=private
       & length() > 50 ...

is_complete()

True if all the nodes of a way were present in the input file.

is_closed()

True if the first point is the same as the last. This can be useful to determine if something might be a polygon when it could otherwise be ambiguous.

This useful feature was added by WanMil.