Skyhawk 172/Cutlass 172
Air Traffic Control Fully Certified
Situational Awareness
ATC Issue All Types; Deviation / Discrepancy - Procedural Published Material / Policy; Inflight Event / Encounter CFTT / CFIT
General None Reported / Taken
Human Factors; Procedure
Center called me and APREQed a C172 at 030 for a GPS approach into ZZZ and I approved it. When the C172 checked in at 030 I cleared them to maintain 030 until established on a segment of the approach and cleared GPS approach. The C172 was still 15 miles outside my boundary. A little later I noticed a Low Altitude warning on the C172 and did not know why. He was still about 10 miles outside my boundary. I am unfamiliar with the MVA in that area and I then pulled up the MVA map. It showed the MVA at 037. Since the C172 was well past the antennae; I took no action.
TRACON Controller described a Low Altitude Alert when clearing an aircraft for an approach outside his airspace; the reporter not issuing a climb because the aircraft in question had already pasted to obstructing antenna.