Medium Transport; Low Wing; 2 Turbojet Eng
Flight Crew Air Transport Pilot (ATP)
Situational Awareness; Confusion
Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Clearance; Ground Excursion Taxiway
Air Traffic Control Provided Assistance; Flight Crew Requested ATC Assistance / Clarification; Flight Crew Became Reoriented
Airport; Chart Or Publication
Upon landing on RWY 13R at SAT; we cleared the runway at taxiway D and proceeded to taxi straight ahead to the terminal. Apparently a new 'island' has been installed at the intersection of taxiway D and G that is not depicted on the 10-9 plate dated 17 Nov 17. There is a large gap in the taxiway blue marking lights right at the end of taxiway D. I ended up taxiing straight ahead between this large gap and transgressed into the island area. We realized that we were in the island area and started to taxi clear; but stopped because we might hit one of the ground taxi lights. We called Ground Control and advised them of our situation. We also called Base Ops and requested they send the tug out to our position. Ground Control sent over an operations vehicle to see if we could taxi clear of island without hitting any taxi lights. The Ops personnel informed us that we did not hit any taxi lights but might not clear them if we taxied clear of island. I decided to shut down both engines and have the tug hook us up and tow us clear of the island and to the gate. This is what we did and there was no damage to aircraft or any ground equipment or taxi lights.From the communications with SAT Ground Control; this new island has caused numerous problems with other aircraft exiting the runway at taxiway D also.  Poor island placement and poor lighting depicting it. It was not depicted on the most recent 10-9 SAT Airport diagram. Night time arrival. Update the 10-9 Airport Diagram to depict the new island and possibly put a Hot Spot area at intersection of taxiway D and G. Also 1 or 2 additional blue taxi lights should be placed in the large gap at the end of taxiway D.
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Air carrier flight crew reported entering an uncharted and poorly lighted island area while taxiing at SAT airport.