The SF1 files for each state are converted to text files and loaded into geodatabases. The SF1 fields are combined as specified in the variable documentation to create the variables being gridded. The SF1 variables are joined to the tiger feature classes. The density of each variable is calculated for each census block. A 30 arc-second fishnet is created and intersected with the census block feature class.
Summary File 1 SF 1 contains the data compiled from the questions asked of all people and about every housing unit. Population items include sex, age, race, Hispanic or Latino origin, household relationship, household type, household size, family type, family size, and group quarters.
Housing items include occupancy status, vacancy status, and tenure whether a housing unit is owner-occupied or renter-occupied.
There are population tables identified with a "P" and 58 housing tables identified with an "H" shown down to the block level; 82 population tables identified with a "PCT" and 4 housing tables identified with an "HCT" shown down to the census tract level; and 10 population tables identified with a "PCO" shown down to the county level, for a total of tables. There are 14 population tables and 4 housing tables shown down to the block level and 5 population tables shown down to the census tract level that are repeated by the major race and Hispanic or Latino groups.
SF 1 in udes population and housing characteristics for the total population, population totals for an extensive list of race American Indian and Alaska Native tribes, Asian, and Native Hawaiian and Other Pacific Islander and Hispanic or Latino groups, and population and housing characteristics for a limited list of race and Hispanic or Latino groups. All files for the State of Texas to the block level. These files provide the greatest detail available from the Summary File 1 data.
There are 48 files total; 47 data files and 1 geo file. This compressed. Each file contains a header row and data from the Summary File 1 data. The contents include data for the state, place, CBSA, etc. The ACS produces survey-based period estimates. For instance, the 5-year estimates are based on data collected during all 5 years. They are not simply an aggregate of 1-year estimates, and overlapping 5-year estimates e.
The ACS provides margins of error to accompany all estimates. Margins of error are smaller for estimates based on more years of data. The choice of which ACS estimates to use will depend on your needs for current data vs. The decennial Census counts every resident of the United States. This package is designed to provide the following features not available elsewhere:. Aug 7, Jul 24, Apr 19, Feb 7, Dec 20, Oct 18, Sep 24, Jul 25, Mar 1, Jan 12, Nov 23, Oct 6, Jan 20,
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