[nycphp-talk] Deconstructing google maps
Rolan Yang
rolan at omnistep.com
Tue Apr 5 22:50:29 EDT 2005
inforequest wrote:
>
> Rolan I find Google's map to be consitently "off" several hundred feet
> or more. I don't understand your comment about conversion error, but
> do you also see the display being off?
>
> -=john andrews
> _______________________________________________
It doesn't seem off that much to me. Where are you looking? What I meant
by conversion error is that when determining Google's scheme for
converting the tile coordinates to lat/lon, the 0,0 point came out to
39.50N 98.35W decimal. The actual geograpic center of the Conterminous
United States is 39°50'N 98°35'W * which would actually be 39.83N
98.58W decimal.
* as noted in http://erg.usgs.gov/isb/pubs/booklets/elvadist/elvadist.html
~Rolan
More information about the talk
mailing list