Questions answered in this file

Is the map's publication year the survey year?

Not necessarily. Record survey, revision, publication, and digitization dates separately where available.

Can an old map prove a proposed road existed?

Not without reading the legend and context. Planning maps may depict proposed features rather than completed ones.

Can I use a modern map search for an old address?

Use it as a lead, not proof. Renaming, renumbering, boundary changes, and realignment can produce misleading matches.

Does an overlay provide exact coordinates?

Not automatically. Source scale, distortion, control points, and alignment method limit precision.

How should I cite a historical map?

Include repository, collection or identifier, map title, edition and dates, sheet number, and the image actually reviewed.