Introduction to extracting and mapping census data

The Census of Population and Housing is an important source of demographic information. Since its inception in 1790, the decennial census has been through several revisions, causing changes in its content, statistical methodology, and distribution. These alterations reflect changes in technology, society, and economy. One of the most exciting features of the 1990 census is its availability on CD‐ROM. Another important advance for the 1990 census is the creation of TIGER/Line files, which provide digital boundary maps to support the census features.