2010-2014 ACS Context for Child Well-Being - Boundaries

This layer contains 2010-2014 American Community Survey (ACS) 5-year data, and contains estimates and margins of error. The layer shows demographic context for child well-being work. This is shown by tract, county, and state boundaries. There are also additional calculated attributes related to this topic, which can be mapped or used within analysis. Later vintages of this layer have a different health insurance age group for children that includes age 18. This layer is symbolized to show the percentage of child population (age under 18) that is living below the Federal poverty level. To see the full list of attributes available in this service, go to the "Data" tab, and choose "Fields" at the top right. Vintage: 2010-2014 ACS Table(s): B01001, B05009, B09001, B09008, B10002, B13016, B14005, B16003, B16004, B17020, B23008, B27010 (Not all lines of these tables are available in this layer.) Data downloaded from: Census Bureau's API for American Community Survey Date of API call: November 28, 2020 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: Data are not available for all geographies within this layer due to data suppression done by the American Community Survey. Since there was a data collection error in the 2011 and 2012 surveys, this impacts the 2010-2014 5-year estimates. To learn more and to see a list of the affected geographies, visit this page about Errata 119. This layer has associated layers containing the most recent ACS data available by the U.S. Census Bureau. Click here to learn more about ACS data releases and click here for the associated boundaries layer. The reason this data is 5+ years different from the most recent vintage is due to the overlapping of survey years. It is recommended by the U.S. Census Bureau to compare non-overlapping datasets. Boundaries come from the US Census TIGER geodatabases. Boundary vintage (2014) appropriately matches the data vintage as specified by the Census. These are Census boundaries with water and/or coastlines clipped for cartographic purposes. For census tracts, the water cutouts are derived from a subset of the 2010 AWATER (Area Water) boundaries offered by TIGER. For state and county boundaries, the water and coastlines are derived from the coastlines of the 500k TIGER Cartographic Boundary Shapefiles. 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.本图层包含2010-2014年美国社区调查（American Community Survey, ACS）5年周期数据，涵盖各类估计值与误差边际。本图层用于展示儿童福祉研究的人口统计背景信息，以普查区（tract）、县、州界为空间单元呈现。此外还包含与该主题相关的额外计算属性，可用于制图或分析工作。 本图层的后续版本针对儿童的健康保险年龄组设置有所调整，将18岁纳入儿童范畴。 本图层的符号化规则用于展示处于联邦贫困线以下的18岁以下儿童人口占比。若要查看本服务中可用属性的完整列表，请前往「数据」选项卡，并选择右上角的「字段」选项。 数据版本：2010-2014年ACS，涉及表格：B01001、B05009、B09001、B09008、B10002、B13016、B14005、B16003、B16004、B17020、B23008、B27010（并非上述表格的所有行均可在本图层中获取）。 数据通过美国人口普查局的美国社区调查应用程序编程接口（API）下载获取，API调用日期：2020年11月28日。全国层面数据可从data.census.gov获取。 美国人口普查局美国社区调查（ACS）：调查概况、地理与ACS技术文档、新闻与更新。 本图层为即用型数据，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。数据也可导出以支持离线工作流程。若需了解更多关于ACS图层的信息，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与ACS。 美国人口普查局的数据说明：本数据基于抽样调查，存在抽样变异性。由抽样变异性导致的估计值不确定程度通过误差边际体现。此处展示的为90%置信水平下的误差边际，其含义为：估计值加减误差边际所构成的区间（即置信上下限）有90%的概率包含真实值。除抽样变异性外，ACS估计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），本表格未体现非抽样误差的影响。 数据处理备注：由于美国社区调查的数据抑制规则，本图层中并非所有地理单元均有可用数据。由于2011年与2012年的调查存在数据采集误差，这对2010-2014年的5年周期估计值产生了影响。若需了解更多信息并查看受影响的地理单元列表，请访问关于Errata 119的页面。 本图层附带关联图层，包含美国人口普查局最新发布的ACS数据。点击此处可了解更多ACS数据发布信息，点击此处可获取关联的边界图层。本数据与最新版本的数据间隔5年以上，是由于调查年份存在重叠。美国人口普查局建议使用非重叠数据集进行比较。 本图层的边界数据源自美国人口普查局TIGER地理数据库。边界版本（2014年）与数据版本匹配，符合普查局的规范。为满足制图需求，已对包含水域及海岸线的普查边界进行裁剪：对于普查区，水域裁剪范围源自TIGER提供的2010年AWATER（水域面积）边界子集；对于州与县边界，水域及海岸线源自50万比例尺TIGER制图边界Shapefile的海岸线数据。原始AWATER与ALAND字段仍作为数据表格中的属性保留（单位：平方米）。 州图层包含52条记录，涵盖美国所有州、哥伦比亚特区及波多黎各。本数据服务中已移除位于水域（如海洋）区域的无人口普查区（普查区代码以99开头）。 百分比及派生计数与对应的误差边际均为计算值（可通过字段名中的「_calc_」前缀识别），且符合美国社区调查的规范。字段别名基于美国社区调查汇总文件文档页面提供的表格框架文件生成。 除-5555…已被设置为0外，其余负值（例如-4444…）均已被设置为空值。原始API数据中的这些负值用于指示以下情况： 1. 误差边际列显示：无可用抽样观测值或抽样观测值过少，无法计算标准误及误差边际，此时不适合进行统计检验。 2. 无可用抽样观测值或抽样观测值过少，无法计算估计值；或由于其中一个或两个中位数估计值落在开放分布的最低区间或最高区间，无法计算中位数比值。 3. 中位数落在开放分布的最低区间，或开放分布的最高区间。 4. 不适合进行统计检验。 5. 估计值已被控制，此时不适合进行抽样变异性的统计检验。 6. 由于抽样案例数量过少，无法展示该地理区域的数据。