| Business | Phone |
| Hmg Engineering Ltd 213 E Hughbert St, Norman 73069 | (405) 321-8700 |
| Pollard & Whited Surveying Inc 2514 Tee Dr, Norman 73069 | (405) 366-0001 |
| Millennium Cartography Plc 115 S Peters Ave, Norman 73069 | (405) 310-2790 |
| Lemke Land Surveying 3625 W Main St # 109, Norman 73072 | (405) 366-8541 |