DMS and Decimal are geographic coordinate (Latidude, Longitude). Decimal uses a signle decimal number. For example: (35.745547, -120.725044). DMS stands for Degrees, Minutes and Seconds and uses single natutal numbers for the degrees and the minutes, and a natural or decimal number for the seconds. For example: (35 44 43.97 N, 120 43 30.16 W) or (35° 44' 43.97" N, 120° 43' 30.16" W).