Surveyors - Land go Results Found: 3 Button group with nested dropdown Ollerhead & Associates Ltd. Ollerhead & Associates Ltd. 17 Coronation Drive Yellowknife NT (867) 873-9690 Sub-Arctic Geomatics a division of Challenger Geomatics Ltd. 226 Utsingi Drive Yellowknife NT X1A 0E7 (867) 873-2047 Underhill Geomatics Ltd. Underhill Geomatics Ltd. 202 - 5204 50th Avenue Yellowknife NT X1A 2P7 (867) 669-2048