You can get a US geodetic survey topo map telling you your latitude/longitude as determined by surveyors (ref geodetic marker), look up the wiki page for your city, use gps, get a sextant and use celestial navigation, airline nav aids, and compare the results. If they don't match, just show people and be famous. Do this in a second place. Check the google maps (and other, several map sites) for distance between them drive it in a car, or check airline schedules for matching time/speed/distance. Use flat plane formula to calculate distance and spherical geometry. Do this all over the world, especially in the southern hemisphere. Show how these don't match, or how RE math gives wrong answer.
If anything doesn't match RE, I will be your agent. Fame and $.