Census Current (2022) Legal and Statistical Entities Web Map Service; January 1, 2022 vintage.
Census Tracts are small, relatively permanent statistical subdivisions of a county or equivalent entity that are updated by local participants prior to each decennial census as part of the Census Bureau's Participant Statistical Areas Program. The Census Bureau delineates census tracts in situations where no local participant existed or where state, local, or tribal governments declined to participate. The primary purpose of census tracts is to provide a stable set of geographic units for the presentation of statistical data.
Census tracts generally have a population size between 1,200 and 8,000 people with an optimum size of 4,000 people. A census tract usually covers a contiguous area; however the spatial size of census tracts varies widely depending on the density of settlement. Census tract boundaries are delineated with the intention of being maintained over a long time so that statistical comparisons can be made from census to census. Census tracts occasionally are split due to population growth or merged as a result of substantial population decline.
Census tract boundaries generally follow visible and identifiable features. They may follow non-visible legal boundaries, such as minor civil division (MCD) or incorporated place boundaries in some states and situations, to allow for census tract-to-governmental unit relationships where the governmental boundaries tend to remain unchanged between censuses. State and county boundaries always are census tract boundaries in the standard census geographic hierarchy. Tribal census tracts are a unique geographic entity defined within federally recognized American Indian reservations and can cross state and county boundaries. Tribal census tracts may be completely different from the census tracts and block groups defined by state and county.
|Category||Census & Statistics|
|Copyright||Copyright may apply. Please check the source for more information.|
|Regions||North America, Samoa|
|Data type||Vector multipolygon|
|Attributes||AREALAND, ALANDHIST, AREAWATER, AWATERHIST, COUNTY, EFFDATE, ESTABDATE, FUNCSTAT, GEOID, LSADC, MTFCC, BASENAME, NAME, OID, STATE, TRACT, UR, VINTAGE, CENTLON, CENTLAT, INTPTLON, INTPTLAT, HU100, POP100, AREA, LEN|
|Services||Vector Query API, Web Feature Service (WFS)|
|Added||14 Sep 2022 ago|
|Last checked||14 Sep 2022 ago|