A COMMERCIAL GPS DATABASE SHOWS THE AGS TRSA CEILING AT 6000 FT WHILE THE FAA ATLANTA SECTIONAL INDICATES A 10000 FT CEILING.

Narrative

I WAS CRUISING AT 9500 FT MSL IN MY SOCATA TB-20; SCANNING MY GARMIN 496 WITH A CURRENT COMMERCIAL DATABASE. THE GPS SHOWED THE AGS TRSA AS 6000 FT/1700 FT MSL; THE CURRENT ATLANTA SECTIONAL SHOWED THE TRSA AS 10000 FT/1700 FT MSL. I DID NOT NOTICE THE DISCREPANCY UNTIL I HAD FLOWN 4 MILES INTO THE OUTER RING OF THE AGS TRSA. MY PLAN WAS TO OVERFLY THE ENTIRE AREA AT 9500 FT; AVOIDING THE TRSA BY 3500 FT. ON REALIZING THAT I WAS NOT COMMUNICATING WITH AGS I INITIATED A TURN TO THE NORTHWEST AND A CLIMB TO 10500 FT MSL TO EXIT THE TRSA AND AVOID RESTRICTED AREA R-3004A. I DID NOT CONTACT AGS APPROACH. AT NO TIME DID I ENTER THE CLASS D AIRSPACE OF AGS. I WAS NOT ON A VFR FLIGHT PLAN AND HAD NOT REQUESTED FLIGHT FOLLOWING. ADDITIONALLY; I WAS ADVISED IN MY PREFLIGHT BRIEFING THAT THERE WERE NO TFR'S ALONG MY ROUTE OF FLIGHT. I AM NOT SURE THIS WAS A VIOLATION OF ANY FAR AS MY UNDERSTANDING IS THAT 'PILOTS OPERATING UNDER VFR ARE ENCOURAGED TO CONTACT THE RADAR APPROACH CONTROL AND AVAIL THEMSELVES OF THE TRSA SERVICES.' HOWEVER; PARTICIPATION IS VOLUNTARY ON THE PART OF THE PILOT' 3-5-6 TERMINAL RADAR SERVICE AREA (TRSA) PARAGRAPH C. HOWEVER; I THOUGHT IT PRUDENT TO FILE AN ASRS REPORT AND AT A MINIMUM; NOTIFY NASA OF A DISCREPANCY IN THE ATLANTA VFR CHART AND COMMERCIAL GPS DATABASE. FOR MY PART; A CLOSER REVIEW OF THE CHART TO THE DATABASE IS PRUDENT AND THAT THE SECTIONAL CHARTS ARE PRIMARY; FOR FLIGHT PLANNING INFORMATION; NOT THE GPS DATABASE.