Smoke Alarm Distribution

This data set contains estimates of the percentage smoke detector utilization at the Census Tract level for the United States. Development of this data set is described in NIST TN 2020 (see references below).The zip file contains the data in shapefile format. Each record is a single census tract (using the 2013 Tiger files for census tracts) with associated data. Fields contained in the data set are:geoid: Geographic ID of the census tract. Format is '14000USXXYYYZZZZZZ', where XX is the FIPS code for the state, YYY is the FIPS code for the county, and ZZZZZZ is the census tract number. This field serves as a unique ID for the dataset.state: FIPS code for the state.county: FIPS code for the county.tract: Tract number.smsa: Standard Metropolitan Statistical Area as used in the American Housing Survey.PUMA: Public Use Microdata Area ID.region: Census region.dtctrs: Estimated fraction of households in the census tract with smoke detectors installed.