Hi Andrzej, can you not make use of mkgmap:country to handle this scenario? mkgmap:country=DZA | mkgmap:country=AGO | mkgmap:country=SHN | mkgmap:country=BEN ... {set continent=AF} continent=AF & landuse=farmland [0x10f01 level 1] Would mkgmap be better with a mkgmap:continent variable using place=continent added? Regards, Mike -----Original Message----- From: Andrzej Popowski [mailto:popej@poczta.onet.pl] Sent: 07 February 2017 12:39 To: mkgmap-dev@lists.mkgmap.org.uk Subject: Re: [mkgmap-dev] To do: If-Then-Else 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