Any Unknown or Unlisted Aircraft Manufacturer
Flight Crew Air Transport Pilot (ATP)
Situational Awareness
Inflight Event / Encounter CFTT / CFIT
General None Reported / Taken
Aircraft; Airport
On initial climb; Tower issued a climb to 2;000 FT MSL and a westerly heading.  After initial check-in with  TRACON; we maintained our initial instructions and leveled at 2;000 FT.  We were then issued a turn to the south; and upon entering the turn in a timely manner; approximately 6 NM West of the airport; we received an aural GPWS warning 'terrain terrain; pull up'.  At this point; we were in day VMC conditions and referenced the terrain page and continued the turn.  There was only one warning cycle given and evasive action was not initiated due to fact that we were in day VMC; myself and the First Officer were familiar with the area; no conflicting obstacles were noted on the terrain page nor visually; and the aural warning had stopped.  I believe that the only obstacle in our vicinity which could have been calculated by the terrain system as a potential conflict was an 878 FT MSL tower.  The flight continued without incident. Not knowing the minimum vectoring altitude in the area; it is difficult to tell the root cause of the event; whether we were taken too far West for our assigned altitude or if the GPWS system logic and parameters were responsible.  The GPWS did test successfully before the flight as well as each flight since.
Because they were flying in CAVU daylight conditions and were familiar with the area the flight crew of an unidentified Part 91 passenger flight aircraft chose not to respond to an apparently anomalous EGPWS 'Terrain' warning.