[OSM-talk] bounding box requests, and failures

Paul Fox pgf at foxharp.boston.ma.us
Wed Nov 28 17:24:51 GMT 2007


martijn van oosterhout wrote:
 > On Nov 28, 2007 6:11 PM, Paul Fox <pgf at foxharp.boston.ma.us> wrote:
 > > but i'm actually surprised that _either_ request works, since both
 > > ask for over .35 degrees of lon/lat, which clearly exceeds the 0.25 listed
 > > on the wiki page.
 > 
 > The 0.25 is (IIRC) calibrated to the latitude you're at. So at the
 > equator it's exactly 0.25 but as you get further north/south the limit
 > is higher (otherwise very far north even very small areas would never
 > be able to be downloaded...)

that would make sense, but it's not what the wiki says:
    "They cannot enclose more than 0.25 degrees of latitude or
    longitude.  The area covered by the largest possible bounding
    box (of 0.25 square degrees) varies from about 900 square
    miles at the equator to about 400 square miles on Iceland."

paul
=---------------------
 paul fox, pgf at foxharp.boston.ma.us (arlington, ma, where it's 38.8 degrees)




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