Skip Navigation Links  The Library of Congress >> Researchers
Geography and Map Reading Room (Geography & Map Division)
  Home >> Sanborn Maps >> Congested/Business Maps

Interpreting Congested District or Business District Maps

A valuable feature in the prefatory material of editions for large cities is the map of the "congested" or "business" district. This kind of map was drawn at scales intermediate between the large scale of a single sheet and the small scale of the key map for a volume. A typical map of this type might cover an area twenty blocks by thirty blocks in size. Generally, such maps served as a frame of reference for understanding the relationship of buildings and places in the heavily developed portions of towns. In some cases, they were annotated to show the limits of coverage by fire departments (in the early years of fire protection, fire company service was not provided to all parts of a town or city) or some other salient feature of the city.

How to interpret:

Top of Page Top of Page
  Home >> Sanborn Maps >> Congested/Business Maps
  The Library of Congress >> Researchers
  March 23, 2022
Legal | External Link Disclaimer

Contact Us:  
Ask a Librarian