T&M - G.I.S. Capabilities T&M Associates provides a variety of Geographic Information Systems (G.I.S.) along with other mapping services such as computerized lot line and street maps; full color master plans; zoning and other maps. Clients utilizing these services include municipalities, counties, utilities authorities and regional agencies. The firm has prepared numerous municipal, utility authority, county and other G.I.S. programs dealing with land use, park sites, environmental constraints, transportation facilities, and other issues.