Hello, Do I have the right to write in my style points file something like that : seamark:buoy_lateral:colour=green [0x1604 resolution 20] seamark:buoy_lateral:colour=red [0x1605 resolution 20] The nodes in the osm file are like those ones : <node id='-10342' action='modify' timestamp='2010-05-22T11:29:17Z' visible='true' lat='46.957287947016' lon='-2.322523554923099'> <tag k='seamark:buoy_lateral:category' v='port' /> <tag k='seamark:buoy_lateral:colour' v='red' /> <tag k='seamark:buoy_lateral:shape' v='pillar' /> <tag k='seamark:light' v='yes' /> <tag k='seamark:light:colour' v='red' /> <tag k='seamark:topmark:colour' v='red' /> <tag k='seamark:topmark:shape' v='cylinder' /> <tag k='seamark:type' v='buoy_lateral' /> </node> <node id='-10340' action='modify' timestamp='2010-05-22T11:29:17Z' visible='true' lat='46.96333741944368' lon='-2.3130953826729668'> <tag k='seamark:buoy_lateral:category' v='starboard' /> <tag k='seamark:buoy_lateral:colour' v='green' /> <tag k='seamark:buoy_lateral:shape' v='pillar' /> <tag k='seamark:topmark:colour' v='green' /> <tag k='seamark:topmark:shape' v='cone, point up' /> <tag k='seamark:type' v='buoy_lateral' /> </node> Thank you. Francois --