HLG Engineering & Surveying A Geo Innovations Group Affiliate 705-F Lakeview Plaza Blvd. Worthington, Ohio 43085 Voice - 614-841-0053 Fax - 614-841-0170 E-Mail Web Site Contact: Charles A. Rolling, P.S. or Rick Chaffin, S.I.T. Services: GPS & GIS, Boundary Surveys, Legal Descriptions, Topographic Surveys, Construction Staking, Oil & Gas Pipeline Surveys, Cellular Tower Sites, Aerial Survey Control, Project Survey Control, GIS Mapping & Data Conversion, Cadastral Mapping, ALTA Surveys, Easement Documents, and Mortgage Surveys.