
Sanborn Fire Insurance Maps
What is it? Large scale street plans - including building outlines, property boundaries, and building use - produced by the Sanborn Fire Insurance Company from 1867 to 1970.
Why use it? Locate buildings and neighborhoods. See a neighborhood "as it was." Study the growth of towns and cities. Identify the impact of new developments.
An introductory booklet in PDF format, "What is OPLIN?," is available at http://www.oplin.org/oplin/training/WhatIsOPLIN_08.pdf
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