I wonder if it would not be better to map really big lakes as coastline. This is done somewhere, e.g. here http://www.openstreetmap.org/browse/relation/555716 (Baikal lake)
but it is not done here: http://www.openstreetmap.org/browse/relation/1308279 (Lake Onega) This results in bad rendering for low zoom tiles, with the lake showing up on zoom6 but not on zoom5 (in Mapnik). A few similar cases (quite big lakes modeled as water and not as coastline) can be found all over the world, e.g. - http://www.openstreetmap.org/browse/relation/1239458 (Vänern in Sweden, which by the way has a warning attached that suggests it once was a coastline ;-) ) - http://www.openstreetmap.org/browse/relation/38997 (Lago de Nicaragua) - some lakes in Canada, ... Modelling these as multipolygons also might slower the rendering speed the more complex the polygons get by adding further detail. cheers, Martin _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
