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I have tried using mkgmap:postal_code=* & mkgmap:area2poi=true { add place=city; set name=$(addr:postcode); delete addr:postcode } but I am getting a lot of "point number to big" error messages and map compilation fails, is there a limit to the number of poi in a map ? I also have <tag k='place' v=’locality'/> in the osm file so maybe every post code is used twice, I think there are about 1600000 of them. My post codes are 7 digit eg ( NE46 3JB) which I think is the addr:postcode tag and that postal_code is for an area post code eg (NE46) so I probably don't need the & mkgmap:area2poi=true test. Using just <tag k='place' v=’locality'/> does not create a map that a Nuvi 200 can find post codes in but I have not tried other gps's or basecamp yet. -- View this message in context: http://gis.19327.n5.nabble.com/converting-post-codes-to-cities-tp5776958p577... Sent from the Mkgmap Development mailing list archive at Nabble.com.