Households with No Vehicles Available by State

From Esri Demographics: This layer shows household size by number of vehicles available. This is shown by tract, county, and state boundaries. This service is updated annually to contain the most currently released American Community Survey (ACS) 5-year data, and contains estimates and margins of error. There are also additional calculated attributes related to this topic, which can be mapped or used within analysis. This layer is symbolized to show the percentage of households with no vehicle available. To see the full list of attributes available in this service, go to the "Data" tab, and choose "Fields" at the top right. Current Vintage: 2019-2023 ACS Table(s): B08201 Data downloaded from: Census Bureau's API for American Community Survey Date of API call: December 12, 2024 National Figures: data.census.gov The United States Census Bureau's American Community Survey (ACS): About the Survey Geography & ACS Technical Documentation News & Updates This ready-to-use layer can be used within ArcGIS Pro, ArcGIS Online, its configurable apps, dashboards, Story Maps, custom apps, and mobile apps. Data can also be exported for offline workflows. For more information about ACS layers, visit the FAQ. Please cite the Census and ACS when using this data. Data Note from the Census: Data are based on a sample and are subject to sampling variability. The degree of uncertainty for an estimate arising from sampling variability is represented through the use of a margin of error. The value shown here is the 90 percent margin of error. The margin of error can be interpreted as providing a 90 percent probability that the interval defined by the estimate minus the margin of error and the estimate plus the margin of error (the lower and upper confidence bounds) contains the true value. In addition to sampling variability, the ACS estimates are subject to nonsampling error (for a discussion of nonsampling variability, see Accuracy of the Data). The effect of nonsampling error is not represented in these tables. Data Processing Notes: This layer is updated automatically when the most current vintage of ACS data is released each year, usually in December. The layer always contains the latest available ACS 5-year estimates. It is updated annually within days of the Census Bureau's release schedule. Click here to learn more about ACS data releases. Boundaries come from the US Census TIGER geodatabases, specifically, the National Sub-State Geography Database (named tlgdb_(year)_a_us_substategeo.gdb). Boundaries are updated at the same time as the data updates (annually), and the boundary vintage appropriately matches the data vintage as specified by the Census. These are Census boundaries with water and/or coastlines erased for cartographic and mapping purposes. For census tracts, the water cutouts are derived from a subset of the 2020 Areal Hydrography boundaries offered by TIGER. Water bodies and rivers which are 50 million square meters or larger (mid to large sized water bodies) are erased from the tract level boundaries, as well as additional important features. For state and county boundaries, the water and coastlines are derived from the coastlines of the 2023 500k TIGER Cartographic Boundary Shapefiles. These are erased to more accurately portray the coastlines and Great Lakes. The original AWATER and ALAND fields are still available as attributes within the data table (units are square meters). The States layer contains 52 records - all US states, Washington D.C., and Puerto Rico Census tracts with no population that occur in areas of water, such as oceans, are removed from this data service (Census Tracts beginning with 99). Percentages and derived counts, and associated margins of error, are calculated values (that can be identified by the "_calc_" stub in the field name), and abide by the specifications defined by the American Community Survey. Field alias names were created based on the Table Shells file available from the American Community Survey Summary File Documentation page. Negative values (e.g., -4444...) have been set to null, with the exception of -5555... which has been set to zero. These negative values exist in the raw API data to indicate the following situations: The margin of error column indicates that either no sample observations or too few sample observations were available to compute a standard error and thus the margin of error. A statistical test is not appropriate. Either no sample observations or too few sample observations were available to compute an estimate, or a ratio of medians cannot be calculated because one or both of the median estimates falls in the lowest interval or upper interval of an open-ended distribution. The median falls in the lowest interval of an open-ended distribution, or in the upper interval of an open-ended distribution. A statistical test is not appropriate. The estimate is controlled. A statistical test for sampling variability is not appropriate. The data for this geographic area cannot be displayed because the number of sample cases is too small.本数据集源自Esri人口统计库：本图层按可用车辆数量展示家庭户规模分布，展示维度涵盖普查街区（Census Tract）、县及州界。本服务每年更新一次，纳入最新发布的美国社区调查（American Community Survey, ACS）5年周期数据，包含估算值与误差边际。此外还提供与该主题相关的额外计算属性，可用于制图或分析工作。本图层采用符号化渲染，展示无可用车辆的家庭户占比。如需查看本服务中所有可用属性列表，请前往「数据」选项卡，并点击右上角的「字段」按钮。 当前数据版本：2019-2023年ACS数据 数据表：B08201 数据来源：美国人口普查局美国社区调查API API调用日期：2024年12月12日 全国统计数据：data.census.gov 美国人口普查局美国社区调查（ACS）：调查概况、地理信息与ACS技术文档、新闻及更新 本图层为即用型数据集，可在ArcGIS Pro、ArcGIS Online、其可配置应用、仪表盘、故事地图（Story Maps）、自定义应用及移动应用中使用。数据也可导出用于离线作业流程。如需了解更多ACS图层相关信息，请访问常见问题解答（FAQ）页面。使用本数据时，请注明引用美国人口普查局及ACS。 美国人口普查局数据说明：数据基于抽样调查，存在抽样变异性。抽样变异性带来的估算值不确定程度通过误差边际体现。此处展示的为90%置信水平的误差边际，其含义为：估算值减去误差边际与估算值加上误差边际所构成的区间（即置信上下限）有90%的概率包含真实数值。除抽样变异性外，ACS估算值还存在非抽样误差（关于非抽样变异性的讨论，请参见《数据准确性》文档），但本数据表未体现非抽样误差的影响。 数据处理说明：每年美国人口普查局发布最新版本的ACS数据后，本图层将自动更新，通常更新时间为12月。本图层始终包含最新可用的ACS 5年周期估算值，每年会在美国人口普查局发布数据后的数日内完成更新。点击此处了解更多ACS数据发布相关信息。 地理边界源自美国人口普查局TIGER地理数据库，具体为国家州以下地理数据库（文件命名格式为tlgdb_(year)_a_us_substategeo.gdb）。地理边界与数据同步每年更新一次，且边界版本与人口普查局规定的数据版本严格匹配。为满足制图需求，本数据集已移除普查边界中的水域及海岸线要素。针对普查街区，水域移除范围源自TIGER提供的2020年区域水文边界子集。面积达5000万平方米及以上的大中型水体及河流，以及其他重要地理要素，均已从街区级边界中移除。针对州及县级边界，水域及海岸线源自2023年500k分辨率TIGER制图边界形状文件的海岸线数据，已移除这些要素以更精准地呈现海岸线及五大湖区域轮廓。数据表格中仍保留原始的AWATER与ALAND字段（单位：平方米）。 州级图层共包含52条记录，涵盖美国所有州、华盛顿哥伦比亚特区及波多黎各。 位于水域（如海洋）区域的无人口普查街区数据已从本服务中移除（以99开头的普查街区）。 占比、衍生计数及相关误差边际均为计算所得值（可通过字段名中的"_calc_"标识识别），且严格遵循ACS的相关规范要求。字段别名基于美国社区调查汇总文件文档页面提供的表框架文件生成。 部分负值（如-4444...）已被设置为空值，唯有-5555...被设置为0。原始API数据中的这些负值用于表示以下情形： 1. 误差边际列提示：无有效样本观测值或样本观测值过少，无法计算标准误及误差边际，不适合进行统计检验； 2. 无有效样本观测值或样本观测值过少，无法计算估算值；或因其中一个或两个中位数估算值落在开放式分布的最低区间或最高区间，无法计算中位数比值； 3. 中位数落在开放式分布的最低区间或最高区间； 4. 不适合进行统计检验； 5. 估算值已被控制； 6. 不适合针对抽样变异性进行统计检验； 7. 样本量过小，无法展示该地理区域的数据。