Steve Bennett schrieb: > So, my hard work tagging beaches and moving the coastline looks like crap: > http://osm.org/go/u...@bcc > > Anyone know how long it's likely to be until the next coastline update > is taken into account by Mapnik? > > (For bonus marks, can anyone explain what's special about coastlines, > and why this happens?) The almighty wiki can:
http://wiki.openstreetmap.org/wiki/Coastline The main problem of showing coastlines from OSM data is that Mapnik really needs closed polygons. The polygon can (and normally should) be made of several ways, but the ways should join end-to-end and eventually loop back round without interruption, to close the polygon. An imperfect coastline with many small gaps, reversed ways and other defects will cause the polygon to break, and the coastline to be rendered incorrectly . One of the features of the Coastline error checker is to try and join coastlines in such a way as to make high-quality coastlines even with these imperfections. As the coastlines are uploaded and completed the quality can be checked. Peter _______________________________________________ talk mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk
