UNAUTHORIZED UNCOORDINATED RWY ENTRY.

Narrative

AFTER LNDG ON RWY 23 I EXITED THE RWY WITH A R TURN ONTO TAXIWAY B. THE GND CTLR INSTRUCTED ME TO TAXI STRAIGHT AHEAD; TURN R AND HOLD SHORT OF 28L. I COMPLIED. 1 ACFT LANDED; THE GND CTLR CLRED ME TO CROSS RWY 28L TO THE RAMP. FROM MY VANTAGE POINT IT APPEARED THAT TO CROSS RWY 28L I WOULD HAVE TO CROSS IT ON A DIAGONAL TO REACH THE OPPOSITE TAXIWAY ENTRANCE TO THE RAMP. AS I CROSSED RWY 28L THE CTLR CALLED AND TOLD ME TO GET OFF THE RWY AND WANTED TO KNOW WHERE I WAS GOING. I REPLIED THAT I HAD BEEN CLRED TO CROSS RWY 28L. THE CTLR RESPONDED THAT HE HAD WANTED ME TO CROSS THE RWY STRAIGHT AHEAD; NOT ON A DIAGONAL. AFTER I CROSSED THE RWY I REQUESTED FURTHER TAXI INSTRUCTION CLARIFICATION TO THE AVIATION RAMP. PROBLEM AROSE: FROM MY VANTAGE POINT BEFORE XING RWY 28L I COULD SEE THAT THE ENTRANCE TO THE RAMP WOULD TAKE ME ON A DIAGONAL ACROSS THE RWY. I BELIEVED AT THE TIME THAT I WOULD BE ENTERING THE RAMP AT TAXIWAY C2 FROM G. I WAS ACTUALLY AT F2 AND ENTERED AT C1 WHICH IS QUITE WIDE AND ON A DIAGONAL. MY HOLD POS WAS ACTUALLY F2; THE CTLR WANTED ME TO ENTER AT F1. FROM F2 ON THE S SIDE OF THE RWY I WAS NOT ABLE TO SEE THAT IT WAS POSSIBLE TO CROSS STRAIGHT AHEAD TO F1. I BELIEVE THAT THIS IS DUE TO THE FACT THAT RWY 28L HAS A LARGE CROWN FOR WATER RUNOFF WHICH BLOCKED THE VIEW OF THE OPPOSITE ENTRANCE. THE CTLR'S YELLING 'TO GET OFF THE RWY AND WHERE ARE YOU GOING' CREATED CONFUSION; UPON REALIZING WHAT THE ACTUAL INTENT WAS; I EXPEDITED. CTLRS SHOULD NOT YELL AT PLTS; THEY CAN BE FIRM BUT NOT WHERE SAFETY NOW BECOMES COMPROMISED BECAUSE PLTS OPERATING AT UNFAMILIAR ARPTS BECOME EVEN MORE CONFUSED. I HAD ONLY BEEN TO COLUMBUS ONCE BEFORE AND HAD NEVER LANDED ON RWY 23L. CTLR SHOULD HAVE SAID TAXI STRAIGHT AHEAD CROSS RWY 28L; INSTEAD OF JUST CROSS 28L.