On: How to build a IP geolocation database from scratc...

[nonethewiser]

Comments seem fairly dismissive but I actually found this really interesting. It reminds me of a task I had in my first position to add PostGIS to our database and a location based search. That was based off addresses and zipcodes.

[mannyv → nonethewiser]

That's relatively simple to do, even in mysql. One trick is to use a square instead of a circle, which avoids a lot of math.