Aug 17 – Tetrad Computer Applications Inc. is now shipping first 12 states of the Summary File 3 (SF3) census data to PCensus users.
The popular data is organized into 63 easy-to-use tables. The original census bureau tables are also included. Free data for the state and county level can be downloaded with a demo copy of “PCensus for MapInfo”.
Summary File 3 consists of approximately 5,300 Census 2000 variables covering social, economic and housing characteristics compiled from a sample of approximately 19 million housing units (about 1 in 6 households) that received the Census 2000 long-form questionnaire.
The census data is presented in a hierarchical sequence down to the block group level. Also included are Zip Code Tabulation Areas (ZCTAs), which are approximate representations of United States Postal Service ZIP Code service areas.
With PCensus, SF3 data can be used at the block level. Having more census data points allows much greater resolution for calculating profiles of user defined areas (circles, polygons, drive times).