Data files A set of 3 data files needs to be in the same directory as the executable to specify a population for FluTE. The file names consist of a prefix (e.g., "seattle") followed by a suffix. *-tracts.dat - Tract populations and locations, from http://www.census.gov/geo/www/cenpop/cntpop2k.html. The columns in this comma-delimited file are: state FIPS code, county FIPS code, tract FIPS code, tract population, tract longitude, and tract latitude. *-wf.dat - Tract-to-tract workerflow, extracted from stp64.us from Census 2000 Special Tabulation Product 64: Census tract of work by census tract of residence 2000. For the US-level data. Commutes over 100 miles were eliminated from the data. The columns in this space- delimited file are: home state FIPS code, home county FIPS code, home tract FIPS code, work state FIPS code, work county FIPS code, work tract FIPS code, and number of workers. *-employment.dat - The number of employed working-age adults and the total number of working-age adults, from the Census Summary File 3 (SF3, Table PCT35). The columns in this space-delimited file are: state FIPS code, county FIPS code, tract FIPS code, number of employed 20-64 year olds, and the total number of working-age individuals (19-64 year olds). This sample population is: la - Los Angeles County. la-tracts.dat is not from the 2000 Census; It is based on 2007 PEPS estimates from Walter R. McDonald & Associates, Inc. (WRMA) and padded with an additional 776,000 individuals to represent the estimated undocumented population [Flaming et al. Hopeful Workers, Marginal Jobs. 2005]. The other "la" data files are based on the 2000 US Census.