There is a main gas line easement on the edge of our land, but the gas company is concerned about where the garden is. Would the line be marked well enough on a county map to say where the easement is?
If there's a record of survey or possibly on the deed, they might show the easement. A "GIS" or tax assessor's map is unlikely to accurately show the easement.
A title company might be able to find easement information, but I've heard of plenty of cases where the easement description is not precise enough to accurately locate its position. Then the utility builds somewhere within their easement...hopefully. It's unlikely to be centered within the easement although as time passes, sometimes the easement will recenter itself on the installed lines.