I am not a GIS expert, but have a passing interest in it among other things. As well as in geocoded tweets. One thing that jumped out at me was the unnecessar

I am not a GIS expert, but have a passing interest in it among other things. As well as in geocoded tweets. One thing that jumped out at me was the unnecessary precision with which you post your #ll examples. Twitter, as you know is limited to 140 chars, so space is precious. In your examples you go to 15 decimal places. This seemed extreme. Apparently anything over 6 decimal places is. .000001 degree of latitude = 0.3 feet or 0.11 meters or 4.32 inches or 11 centimeters. source: http://www.abika.com/Reports/latitude_longitude_lookup.htm http://www.abika.com/Reports/latitude_longitude_lookup.htm One's location within 4.32 inches seems pretty accurate for most things, especially if this is extended to GPS devices, which are usually only accurate within a few meters at best.