Sanborn Map Company's insurance maps of Boulder, Colorado, 1918. 1918.
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Sanborn Map Company
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The Sanborn Map Company was founded in 1867 with headquarters in New York City. Its purpose was to produce maps that would show "at a glance the character of the fire insurance risks of all buildings" in a give community. Since these maps had a very specialized use, "there were usually fewer than twenty orders for a single map sheet". Consequently, even though Sanborn maps are printed works, their rarity is similar to that of manuscript maps. The Sanborn Map Company ceased making its insurance r...
