Altoona, Pa. . maps : col. ; on sheets 65 x 55 cm. Title taken from upper left corner of sheet 99; Oriented with north to the upper right; Set follows standard Sanborn color-coded key; Maps Library has duplicate copies of sheets 99 and 102-105 that are not encapsulated; Maps Library copy is incomplete and is encapsulated. Scale approximately 1:600. 50 ft. to an in.