[mkgmap-dev] To do: If-Then-Else

Tue Feb 7 12:38:46 GMT 2017

Hi Dave,

I think the idea is to include some preprocessing capability to style 
interpreter.

I develop a single style for my topo maps, but I need some possibility 
to get a small variation in style depending on region. For example I 
prefer to show landuse=farmland on a map of Africa but to remove it on a 
map of Europe. So instead of maintaining 2 nearly identical styles, I 
would like to get a conditional statement, something like:

if (SHOW_FARMS) (
	landuse=farmland [0x10f01 level 1]
)

and then add (or not) an option to mkgmap like --style-define=SHOW_FARMS

-- 
Best regards,
Andrzej