Sanborn maps are not accurate when it comes to railroad property, esp. when
it comes to track. Sanborn maps were drawn for insurance purposes, ie to set
fees, and most railroads were self insured. With no chance of selling
insurance to railroads, Sanborn did not bother to measure and map railroad
property.
What Sanborn maps are good for is buildings that might be insured; their
size and location, what they were constructed of, etc. They are great for
researching industrial buildings found along side tracks. They will show
loading docks, doors, names of the business, etc. They might even show the
spur(s) built into the industry.
Doug Harding
www.iowacentralrr.org
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