At the equator, each degree of latitude or longitude represents a distance of 111 km. At latitude 60° (N or S), each latitude degree is still 111 km but since cos 60° = 0.5, each longitude degree is just half of that or 55.5 km.
In JOSM, when I use the Mercator projection method, look at the equator and zoom out until the little scale bar in the top left corner is 111 km, the difference in longitude between the ends of this bar is one degree. That's fine. But if I look at 60° N (e.g. Stockholm) and repeat the exercise, the end points of the 111 km scale bar is still one degree. That's an error, it should be two degrees. Or rather, when the bar represents one degree, the label should say 55.5 km instead of 111 km. I've never cared too much about that scale, but now I know that these apartment buildings along Syrengatan are 11 x 32 metres and not 22 x 64 metres as JOSM would lead you to believe, http://www.openstreetmap.org/?lat=58.407&lon=15.600&zoom=17&layers=0BFT Also, returning to cycle lanes, the "secondary" road Malmslättsvägen is now marked with cycleway=lane, but this doesn't show on the map here. And how can I indicate that this bus stop is only on the southern side of the street (buses going east)? Buses going in the other direction stop at another place. "Micromapping" is fun. I want zoom=18 now. Hmmm... and higher GPS accuracy. -- Lars Aronsson ([EMAIL PROTECTED]) Aronsson Datateknik - http://aronsson.se _______________________________________________ talk mailing list [email protected] http://lists.openstreetmap.org/cgi-bin/mailman/listinfo/talk
