Why are many IP addresses near Wichita, Kansas in Google map and Web Intelligence apps

[Masa]

I've noticed that there are many IPs shown near Wichita, Kansas, in google map, and also Web Intelligence app.

It seems like the latitude is 38 and longitude is -97. Why?

[Masa · Accepted solution]

Answering to my own question 🙂

This is a limitation of GeoCity database. If IP addresses are identified as ones used in the U.S. but not identified for specific locations, they will be plotted in that latitude and longitude.
( ref: http://forum.maxmind.com/viewtopic.php?f=13&t=5420 )