Interpreting Block Number Tables
Many editions include a listing of block numbers somewhere in
the prefatory material. Block numbers are usually used in real
estate descriptions, and although that was not a function that
fire insurance maps were designed to support, the presence of these
listings indicates their value to insurance agents also.
Example of a Block Number Table
Sometimes there is also a table showing changes in the
numbering system used in a city.
Example of Block Numbers that are changed
How to interpret: