Tract 2020

Census Tracts are small, relatively permanent statistical subdivisions of a county or statistically equivalent entity that can be updated by local participants prior to each decennial census as part of the Census Bureau’s Participant Statistical Areas Program (PSAP). The Census Bureau delineates census tracts in situations where no local participant responded 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. Updated: Weekly The data was created using: Projected Coordinate System: WGS_1984_Web_Mercator_Auxiliary_Sphere Projection: Mercator_Auxiliary_Sphere人口普查分区（Census Tracts）是隶属于县或统计等效单元的小型、相对固定的统计分区，可由本地参与方在每十年一次的人口普查前，依据美国人口普查局（Census Bureau）的参与式统计区域项目（Participant Statistical Areas Program，PSAP）进行更新。当无本地参与方响应，或州、地方及部落政府拒绝参与时，由美国人口普查局负责划定人口普查分区。人口普查分区的核心用途是提供一套稳定的地理单元，用于统计数据的展示与呈现。更新周期：每周。本数据集采用以下坐标系及投影方式构建：投影坐标系（Projected Coordinate System）：WGS_1984_Web_Mercator_Auxiliary_Sphere；投影方式：墨卡托辅助球体投影（Mercator_Auxiliary_Sphere）。