ACS Housing Cost Boundaries

Overview This feature service provides U.S. Census geography layers enriched with American Community Survey housing cost measures. It supports housing affordability analysis across state, county, and census tract levels and includes both renter and owner household cost burden indicators. Feature Layers State: State polygon features with geographic identifiers, land and water area, and ACS estimates describing renter-occupied housing units, renter housing cost burden, owner-occupied housing units, mortgage status, and owner housing cost burden. County: County polygon features with county and state context, area measurements, and the same ACS housing cost indicators for county-level comparison and regional planning. Tract: Census tract polygon features with tract, county, and state context plus ACS housing cost indicators for neighborhood-scale analysis of affordability patterns. Data Theme The service centers on housing affordability and cost burden. It includes ACS-derived household counts, percentages, and margins of error for renter households, owner households with mortgages, and owner households without mortgages. The measures summarize households spending 30 percent or more of income on housing costs, along with related cost categories and uncertainty estimates. Geographic Coverage The layers cover the United States across state, county, and census tract geographies, making the service suitable for multiscale thematic mapping and spatial comparison. Use Cases Mapping renter and owner housing cost burden across the United States Comparing affordability patterns among states, counties, and census tracts Supporting housing policy, community planning, and socioeconomic studies Displaying ACS-based counts, percentages, and margins of error in GIS applications概述 本要素服务提供搭载了美国社区调查（American Community Survey, ACS）住房成本指标的美国人口普查地理图层，可支撑州、县、普查片区（census tract）三级的住房可负担性分析，并涵盖租房户与自有住房户的成本负担指标。 要素图层 州图层：包含地理标识符、水陆面积，以及描述租房住房单元、租房成本负担、自有住房单元、按揭状态与自有住房成本负担的ACS估算值的州面状要素。 县图层：包含县与州关联信息、面积测算数据，以及可用于县级对比与区域规划的同款ACS住房成本指标的县面状要素。 普查片区（census tract）图层：包含片区、县与州关联信息，搭配可用于邻里尺度可负担性格局分析的ACS住房成本指标的普查片区面状要素。 数据主题 本服务以住房可负担性与成本负担为核心，涵盖基于ACS得到的租房户、有按揭的自有住房户以及无按揭的自有住房户的家庭户数、占比与误差边际。该类指标汇总了住房支出占收入30%及以上的家庭情况，同时包含相关成本分类与不确定性估算值。 地理覆盖范围 本图层覆盖美国全境的州、县与普查片区地理单元，适配多尺度专题制图与空间对比分析需求。 应用场景 1. 绘制美国全境租房户与自有住房户的成本负担分布 2. 对比州、县与普查片区间的可负担性格局差异 3. 支撑住房政策制定、社区规划与社会经济研究 4. 在地理信息系统（Geographic Information System, GIS）应用中展示基于ACS得到的户数、占比与误差边际