Pat Ewing, considered by most college coaches as the Ralph Sampson of the high school class of 1981, has chosen the six colleges he will visit this fall. They are Georgetown, North Carolina, UCLA, Villanova, Boston College and Boston University.

Ewing, 6-foot-11, from Cambridge Mass., was visited at his home by coaches from 15 schools earlier this month, including Lefty Driesell, coach at Maryland. From these he chose the six he would visit.

"Of course I'm disappointed he didn't want to visit Maryland," Driesell said yesterday. "He's a great ballplayer and a great kid. I told his coach that if he changed his mind for some reason we would be delighted to have him come visit."

Ewing's parents and his coach, Mike Jarvis, have carefully monitored the recruiting. The coaches were allowed to visit during a specifically designated period. None have Ewing's home phone number. Ewing is expected to make his selection as early as Christmas. pAll of those close to him want to avoid the circus-like atmosphere that accompanied Sampson's recruiting.

Informed sources have labeled Georgetown as the leader in the Ewing chase, although Boston College and Boston University both have chances because Ewing's parents would be happy if he stayed close to home. North Carolina may be hurt by the presence of its freshman center, Sam Perkins. UNC's people insist Perkins could move to forward if Ewing attended.