2010 Population and Poverty at Split Tract
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Tabular data of population by age groups, race and gender, and the poverty by ethnic groups is attached to the split tract geography to create this split tract with population and poverty data. Split tract data is the product of 2010 census tracts split by 2010 incorporated city boundaries and unincorporated community/countywide statistical areas (CSA) boundaries. The census tract boundaries have been altered and aligned where necessary with legal city boundaries and unincorporated areas, including shoreline/coastal areas. Census Tract: Every 10 years the Census Bureau counts the population of the United States as mandated by Constitution. The Census Bureau (https://www.census.gov/) released 2010 geographic boundaries data including census tracts for the analysis and mapping of demographic information across the United States. City Boundary: City Boundary data is the base map information for the County of Los Angeles. These City Boundaries are based on the Los Angeles County Seamless Cadastral Landbase. The Landbase is jointly maintained by the Los Angeles County Assessor and the Los Angeles County Department of Public Works (DPW). This layer represents current city boundaries within Los Angeles County. The DPW provides the most current shapefiles representing city boundaries and city annexations. True, legal boundaries are only determined on the ground by surveyors licensed in the State of California. Countywide Statistical Areas (CSA): The countywide Statistical Area (CSA) was defined to provide a common geographic boundary for reporting departmental statistics for unincorporated areas and incorporated Los Angeles city to the Board of Supervisors. The CSA boundary and CSA names are established by the CIO and the LA County Enterprise GIS group worked with the Los Angeles County Board of Supervisors Unincorporated Area and Field Deputies that reflect as best as possible the general name preferences of residents and historical names of areas. This data is primarily focused on broad statistics and reporting, not mapping of communities. This data is not designed to perfectly represent communities, nor jurisdictional boundaries such as Angeles National Forest. CSA represent board approved geographies comprised of Census block groups split by cities. Data Field: CT10: 2010 Census tract FIP10: 2010 City FIP Code CITY: City name for incorporated cities and “Unincorporated” for unincorporated areas (as of July 1, 2010) CT10FIP10: 2010 census tract with 2010 city FIPs for incorporated cities, unincorporated areas and LA neighborhoods. SPA12: 2012 Service Planning Area (SPA) number. SPA_NAME: Service Planning Area name. HD12: 2012 Health District (HD) number: HD_NAME: Health District name. POP10_AGE_0_4: 2010 population 0 to 4 years old POP10_AGE_5_9: 2010 population 5 to 9 years old POP10_AGE_10_14: 2010 population 10 to 14 years old POP10_AGE_15_17: 2010 population 15 to 17 years old POP10_AGE_18_19: 2010 population 18 to 19 years old POP10_AGE_20_44: 2010 population 20 to 24 years old POP10_AGE_25_29: 2010 population 25 to 29 years old POP10_AGE_30_34: 2010 population 30 to 34 years old POP10_AGE_35_44: 2010 population 35 to 44 years old POP10_AGE_45_54: 2010 population 45 to 54 years old POP10_AGE_55_64: 2010 population 55 to 64 years old POP10_AGE_65_74: 2010 population 65 to 74 years old POP10_AGE_75_84: 2010 population 75 to 84 years old POP10_AGE_85_100: 2010 population 85 years and older POP10_WHITE: 2010 Non-Hispanic White POP10_BLACK: 2010 Non-Hispanic African American POP10_AIAN: 2010 Non-Hispanic American Indian or Alaska Native POP10_ASIAN: 2010 Non-Hispanic Asian POP10_HNPI: 2010 Non-Hispanic Hawaiian Native or Pacific Islander POP10_HISPANIC: 2010 Hispanic POP10_MALE: 2010 Male POP10_FEMALE: 2010 Female POV10_WHITE: 2010 Non-Hispanic White below 100% Federal Poverty Level POV10_BLACK: 2010 Non-Hispanic African American below 100% Federal Poverty Level POV10_AIAN: 2010 Non-Hispanic American Indian or Alaska Native below 100% Federal Poverty Level POV10_ASIAN: 2010 Non-Hispanic Asian below 100% Federal Poverty Level POV10_HNPI: 2010 Non-Hispanic Hawaiian Native or Pacific Islander below 100% Federal Poverty Level POV10_HISPANIC: 2010 Hispanic below 100% Federal Poverty Level POV10_TOTAL: 2010 Total population below 100% Federal Poverty Level POP10_TOTAL: 2010 Total Population AREA_SQMIL: Area in square mile POP10_DENSITY: Population per square mile. POV10_PERCENT: Poverty rate/percentage. How this data created? The tabular data of population by age groups, by ethnic groups and by gender, and the poverty by ethnic groups is attributed to the split tract geography to create this data. Split tract polygon data is created by intersecting 2010 census tract polygons, LA Country City Boundary polygons and Countywide Statistical Areas (CSA) polygon data. The resulting polygon boundary aligned and matched with the legal city boundary whenever possible. Note: 1. Population and poverty data estimated as of July 1, 2010. 2. 2010 Census tract and 2020 census tracts are not the same. Similarly, city and community boundary are not the same because boundary is reviewed and updated annually.
本数据集将按年龄组、种族与性别划分的人口统计数据,以及按族群划分的贫困统计数据,关联至拆分普查区地理单元,以生成附带人口与贫困指标的拆分普查区数据集。拆分普查区数据系通过2010年人口普查区(Census Tract)按2010年已合并城市边界与非合并社区/全县统计区(Countywide Statistical Areas, CSA)边界拆分后得到的产物。必要时,已对普查区边界进行调整并对齐至法定城市边界与非合并区域(含海岸线/沿海地带)。 ### 人口普查区(Census Tract) 依据美国宪法规定,美国人口普查局每十年开展一次全国人口普查。美国人口普查局(https://www.census.gov/)发布了2010年地理边界数据集,其中包含普查区数据,用于全美范围内人口统计信息的分析与可视化制图。 ### 城市边界(City Boundary) 城市边界数据为洛杉矶县的基础底图信息,其基于《洛杉矶县无缝地籍土地基础库》(Los Angeles County Seamless Cadastral Landbase)构建。该土地基础库由洛杉矶县评估员办公室与洛杉矶县公共工程部(Department of Public Works, DPW)联合维护。此图层展示了洛杉矶县境内当前有效的城市边界。公共工程部提供了反映最新城市边界与城市兼并情况的形状文件(shapefile)。真实的法定城市边界仅能由加州持照测量师通过实地勘测确定。 ### 全县统计区(Countywide Statistical Areas, CSA) 全县统计区的设立初衷是为非合并区域与已合并的洛杉矶市向洛杉矶县监督委员会报送部门统计数据提供统一的地理边界。CSA的边界与名称由首席信息官(CIO)确定,洛杉矶县企业地理信息系统(GIS)工作组与县监督委员会非合并区域及外勤代表合作,尽可能贴合居民的通用命名偏好与区域历史名称。此类数据主要服务于宏观统计与政务报送,而非社区边界制图,其设计目标并非精准还原社区范围或诸如安吉利斯国家森林之类的管辖区边界。CSA为经董事会批准的地理单元,由按城市边界拆分的普查区块组(Census block groups)构成。 ### 数据字段 - CT10:2010年人口普查区(2010 Census tract) - FIP10:2010年城市FIP代码(FIP Code) - CITY:已合并城市的名称,非合并区域标注为"Unincorporated(非合并区域)"(数据截至2010年7月1日) - CT10FIP10:附带2010年城市FIP代码的2010年普查区,覆盖已合并城市、非合并区域与洛杉矶社区 - SPA12:2012年服务规划区(Service Planning Area, SPA)编号 - SPA_NAME:服务规划区名称 - HD12:2012年卫生区(Health District, HD)编号 - HD_NAME:卫生区名称 - POP10_AGE_0_4:2010年0至4岁人口数 - POP10_AGE_5_9:2010年5至9岁人口数 - POP10_AGE_10_14:2010年10至14岁人口数 - POP10_AGE_15_17:2010年15至17岁人口数 - POP10_AGE_18_19:2010年18至19岁人口数 - POP10_AGE_20_44:2010年20至44岁人口数 - POP10_AGE_25_29:2010年25至29岁人口数 - POP10_AGE_30_34:2010年30至34岁人口数 - POP10_AGE_35_44:2010年35至44岁人口数 - POP10_AGE_45_54:2010年45至54岁人口数 - POP10_AGE_55_64:2010年55至64岁人口数 - POP10_AGE_65_74:2010年65至74岁人口数 - POP10_AGE_75_84:2010年75至84岁人口数 - POP10_AGE_85_100:2010年85岁及以上人口数 - POP10_WHITE:2010年非西班牙裔白人人口数 - POP10_BLACK:2010年非西班牙裔非裔美国人人口数 - POP10_AIAN:2010年非西班牙裔美国印第安人或阿拉斯加原住民人口数 - POP10_ASIAN:2010年非西班牙裔亚裔人口数 - POP10_HNPI:2010年非西班牙裔夏威夷原住民或太平洋岛民人口数 - POP10_HISPANIC:2010年西班牙裔/拉丁裔人口数 - POP10_MALE:2010年男性人口数 - POP10_FEMALE:2010年女性人口数 - POV10_WHITE:2010年非西班牙裔白人中处于联邦贫困线100%以下的人口数 - POV10_BLACK:2010年非西班牙裔非裔美国人中处于联邦贫困线100%以下的人口数 - POV10_AIAN:2010年非西班牙裔美国印第安人或阿拉斯加原住民中处于联邦贫困线100%以下的人口数 - POV10_ASIAN:2010年非西班牙裔亚裔中处于联邦贫困线100%以下的人口数 - POV10_HNPI:2010年非西班牙裔夏威夷原住民或太平洋岛民中处于联邦贫困线100%以下的人口数 - POV10_HISPANIC:2010年西班牙裔/拉丁裔中处于联邦贫困线100%以下的人口数 - POV10_TOTAL:2010年处于联邦贫困线100%以下的总人口数 - POP10_TOTAL:2010年总人口数 - AREA_SQMIL:以平方英里为单位的区域面积 - POP10_DENSITY:人口密度(每平方英里的人口数) - POV10_PERCENT:贫困率(百分比) ### 数据生成流程 本数据集通过将按年龄组、族群与性别划分的人口表格数据,以及按族群划分的贫困数据关联至拆分普查区地理单元生成。拆分普查区多边形数据通过对2010年普查区多边形、洛杉矶县城市边界多边形与全县统计区(CSA)多边形数据进行空间相交运算得到,并尽可能将生成的多边形边界对齐至法定城市边界。 ### 备注 1. 人口与贫困数据的估算基准为2010年7月1日。 2. 2010年与2020年的普查区边界并不一致。同理,城市与社区边界亦会因年度审核与更新而存在差异。



