Is Sandy Springs, GA actually Atlanta, GA (ambiguous cities while geocoding)?

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I installed postGIS and the associated TIGER geocoder for work, and noticed a strange thing when geocoding some addresses in the Atlanta area. For example, when I geocode the address "8610 Roswell Rd, Atlanta GA 30350," the TIGER geocoder spits out

-[ RECORD 1 ]----------------------------------------------- addy | (8610,,Roswell,Rd,,,"Sandy Springs",GA,30350,t) geomout | 0101000020AD1000000D9C2329851655C04F0F9046E4FE4040 rating | 11

At first I thought this was just an issue where someone had incorrectly entered the address as Atlanta instead of Sandy Springs. Strangely though, if I search for "8610 Roswell Rd, Sandy Springs GA 30350" on googlemaps, it says that the address is in Atlanta. This is despite the fact that a search for Sandy Springs in googlemaps returns a bounding box that clearly includes the address in question.

Does someone know what is causing this discrepancy? Is there something weird going on with cities around Atlanta or is this a general pattern?



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