| Business | Phone |
| Altaohio Columbus 43204 | (614) 439-2548 |
| Terratek Limited 227 E 3rd Ave, Columbus 43201 | (614) 429-0405 |
| Thomas Engineering & Surveying 3803 Sullivant Ave, Columbus 43228 | (614) 276-2619 |
| Columbus Engineering Consultants 840 Michigan Ave, Columbus 43215 | (614) 228-3500 |
| Raab Surveying 852 Marion Rd, Columbus 43207 | (614) 445-7103 |
| Compton Surveying Co 2844 Johnstown Rd, Columbus 43219 | (614) 475-6550 |
| Precision Surveying Svc 947 Antwerp Rd, Columbus 43213 | (614) 866-1625 |
| Ct Consultants Inc 2700 E Dublin Granville Rd, Columbus 43231 | (614) 891-6000 |
| Myers Surveying Co 2740 E Main St, Columbus 43209 | (614) 235-8677 |
| Matmar Co 4225 Donlyn Ct, Columbus 43232 | (614) 863-2633 |
| Haines Surveyors 3405 S Hamilton Rd, Columbus 43232 | (614) 837-2181 |
| Landmark Survey Group 2999 W 5th Ave, Columbus 43212 | (614) 542-0981 |
| Landmark Survey Group Inc 2099 W 5th Ave, Columbus 43212 | (614) 485-9000 |