2020 Census Tracts

The Census Bureau (https://www.census.gov/) maintains geographic boundaries for the analysis and mapping of demographic information across the United States. Every 10 years the Census Bureau counts the population of the United States as mandated by Constitution. The Census Bureau releases the results of this county as demographic data with geographic identifiers so that maps and analysis can be performed on the US population. There are little more Census Tracts within Los Angeles County in 2020 Census TIGER/Line Shapefiles, compared to 2010. Created/Updated: Updated on September 2023, to merged Long Beach Breakwater land-based tracts silver polygons into bigger tract 990300 as per 2022 TIGER Line Shapefiles, and to update Santa Catalina Islands and San Clemente Islands tract boundary based on DPW City boundaries (except 599000 tract in Avalon). Updated on Sep 2022 and Dec 2022, to align tract boundary along city boundaries. Created on March 2021. How was this data created? This geographic file was downloaded from Census Bureau website: https://www2.census.gov/geo/tiger/TIGER2020PL/STATE/06_CALIFORNIA/06037/on February, 2021 and customized for LA County. Data Fields: 1. CT20 (TRACTCE20): 6-digit census tract number, 2. Label (NAME20): Decimal point census tract number.美国人口普查局（Census Bureau，https://www.census.gov/）负责维护用于全美人口统计信息分析与制图的地理边界数据。依照美国宪法规定，人口普查局每十年开展一次全国人口普查。该局会发布各县级行政单元的普查结果作为人口统计数据，并附带地理标识符，以供开展美国人口相关的制图与分析工作。相较于2010年版本，2020年人口普查TIGER/Line形状文件（TIGER/Line Shapefiles）格式的洛杉矶县范围内的普查区（Census Tracts）数量略多。 本数据集的创建与更新记录如下：2023年9月进行更新，将长滩防波堤陆基普查区的面状要素合并至更大的普查区990300（依据2022年TIGER Line形状文件标准），并根据DPW市界更新了圣卡塔利娜岛与圣克莱门特岛的普查区边界（阿瓦隆的599000号普查区除外）；2022年9月与12月分别进行更新，以对齐普查区与城市边界；本数据集最初创建于2021年3月。 本数据集的生成方式：该地理数据文件于2021年2月从美国人口普查局官网https://www2.census.gov/geo/tiger/TIGER2020PL/STATE/06_CALIFORNIA/06037/下载，并针对洛杉矶县进行了定制化处理。 数据字段说明： 1. CT20（TRACTCE20）：6位数字的普查区编号 2. 名称标签（NAME20）：带小数点的普查区编号