Extract, provided by the Census Bureau, allows the selection of several items from selected data tables, enabling one to create data sets tailored to individual needs. While both GO and Extract are available in SSRC, patrons wishing to use Extract are expected to use the technical documentation independently, without additional instruction. As neither program is too powerful, it may be preferable to download needed data, take it away, and rework it, using dBase, Excel or some type of analytic software. Work is in progress that will make tape cartridges directly accessible from the UNIX system. Much of both the 1970 and 1990 data is in a compressed format.
Statistical software is available for analysis.
The Data Library maintains a corresponding collection of codebooks, the printed technical documentation which is needed to locate specific information in a machine-readable file. New Jersey data are acquired routinely. Additional census data will be obtained on tape as needed for Princeton University users. Contact Judith Rowe, or Lisa Cziffra. The Data Library has some of the 1990 tract maps for New Jersey and a few 1980 tract and block maps for New Jersey.