I’ve got many tweets with location 40.7142, -74.0064 (Manhattan), both the latitude and the longitude have 4 digits after the decimal. Other tweets I’ve found have coordinates like: 40.71282431, -74.01226824, with up to digits after the decimal. The precision for the first coordinate is much lower than the second.
Why do some geotags have only 4 digits afther the decimal, while other have 8?
Things I’ve ruled out:
- Interference from buildings: there are many areas in Manhattan that have much higher buildings surrounding a point, that have more precise geotags. Additionally, I’ve found other tweets nearby the first geotag, with a higher precision.
- The center of a bounding box, the first coordinate lies in the southwester corner of the bounding box provided in the place element of the tweet.
- Bots: The text of the tweets highly suggest that it were humans sending those tweets. If it is a bot, humanity is doomed.
- Exact location: Perhaps those tweets were sent from exactly that spot, that a higher precision is not required (that the location actually would be 40.71420000, -74.00640000), but the chances of that happening for at least dozens (if not hundreds) of tweets are impossible.
- Jamming? Not likely
I was thinking that It may have something to do with the correction send by the cell towers, or lack of a ‘WAAS’-like system?