Hi John, I can't find a source that produces such a message. What version of mkgmap is that? Gerd ________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von John Thorn <johnrthorn@gmail.com> Gesendet: Freitag, 8. April 2022 13:33 An: mkgmap-dev@lists.mkgmap.org.uk Betreff: [mkgmap-dev] "Too many roads" I am working on a map of France based on Open IGN, OSM and other sources. I have broken it into tiles 0.25 latitude by 0.5 longitude. I built a set of contours using 'marching squares' on the IGN Height data.. But MKGMAP fails on some of the contour tiles saying 'Too many roads' (which I guess is really Too many Polylines). Is this a limit on the number of Polylines (I could join some shorter ones together) or a limit on the number of data points? Thanks, John www.the-thorns.org.uk/46251550.mp<http://www.the-thorns.org.uk/46251550.mp>