On Tuesday 25 November 2008 22:05:31 Martijn van Oosterhout wrote: > Not sure if it was exactly this problem, but it is due to the size. I > don't know if the word "island" is appropriate, more likely a large > rock :) Did someone actually get on to the thing to measure it? It's > certainly way smaller that you can accurately measure with a GPS > device. > > I'm looking for the cause. The bit of code I thought it would be > doesn't appear to be it after all. > > Does it actually make sense to tag such things as coastline anyway? > > Have a nice day,
I finally had time to look at this again. I first thought the error in lake Erie was probably an artefact of the Landsat pixel size / PGS import process. However it is clearly visible on the Yahoo Imagery. There it is however slightly bigger than the PGS data suggests. I stretched the island to match the aerial image and it now has a diameter of 10m in stead of 6m. Lets see if the error is gone tomorrow. For the error at Cyprus I looked at the OSM data, the Yahoo Imagery and the next picture on Wikipedia: <http://en.wikipedia.org/wiki/Image:Rock.jpg> My conclusion is that it is probably the white spot in the waves in the middle of the picture. So I changed the tagging. I left the error in Estonia alone. As it looks like someone reimported the Estonian coastline from some source other than PGS. -- m.v.g., Cartinus _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk