Selected Economic Characteristics (DP03)

Data from: American Community Survey, 5-year Series King County, Washington census tracts with nonoverlapping vintages of the 5-year American Community Survey (ACS) estimates starting in 2010 from the U.S. Census Bureau's demographic profile of Selected Economic Characteristics (DP03). Also includes the most recent release annually with the vintage identified in the "ACS Vintage" field. The census tract boundaries match the vintage of the ACS data (currently 2010 and 2020) so please note the geographic changes between the decades. Tracts have been coded as being within the City of Seattle as well as assigned to neighborhood groups called "Community Reporting Areas". These areas were created after the 2000 census to provide geographically consistent neighborhoods through time for reporting U.S. Census Bureau data. This is not an attempt to identify neighborhood boundaries as defined by neighborhoods themselves. Vintages: 2010, 2015, 2020, 2021, 2022, 2023, 2024 ACS Table(s): DP03 Data downloaded from: Census Bureau's Explore Census Data 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. 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: 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 2020 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.数据来源：美国社区调查（American Community Survey, ACS）5年系列数据集。本数据集涵盖华盛顿州金县的普查区块组（census tracts），使用美国人口普查局2010年起发布的非重叠年份5年ACS估算数据，源自精选经济特征人口概况表（DP03）。同时包含每年最新发布的数据集，其年份在"ACS Vintage"字段中标注。 普查区块组的边界与ACS数据的年份（当前为2010年和2020年）保持一致，请注意十年间的地理边界变更情况。区块组已被标记为西雅图市范围内的区域，并被分配至名为"社区报告区域（Community Reporting Areas）"的邻里群组。该区域于2000年人口普查后设立，旨在构建长期地理一致性的邻里区域，用于发布美国人口普查局的数据。本数据集并非用于识别邻里自发定义的社区边界。 数据年份：2010、2015、2020、2021、2022、2023、2024 ACS数据表：DP03 数据下载渠道：普查局的"探索普查数据（Explore Census Data）"平台 美国人口普查局美国社区调查（ACS）：关于调查、地理信息与ACS技术文档、新闻与更新 本预构建图层可在ArcGIS Pro、ArcGIS Online、其可配置应用程序、仪表盘、故事地图（Story Maps）、自定义应用程序及移动应用中使用。数据也可导出用于离线作业流程。使用本数据时，请引用美国人口普查局及ACS相关来源。 普查局数据说明： 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算不确定性程度以边际误差（margin of error）表示，此处展示的为90%置信水平的边际误差。边际误差的含义为：估算值减去边际误差与估算值加上边际误差所构成的区间（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》章节），本数据表未体现非抽样误差的影响。 数据处理说明： 边界数据源自美国人口普查局TIGER地理数据库，具体为国家次州级地理数据库（文件名为`tlgdb_(年份)_a_us_substategeo.gdb`）。边界数据与数据同步更新（每年一次），且边界年份与普查局指定的数据年份完全匹配。为制图与地图绘制需求，本普查边界已去除水体及海岸线要素。 对于普查区块组，水体剔除范围源自TIGER提供的2020年区域水文边界子集。面积≥5000万平方米的大中型水体及河流，连同其他重要要素均已从区块组边界中剔除。 对于州界与县界，水体及海岸线源自2020年50万比例尺TIGER制图边界形状文件的海岸线，已剔除此类要素以更精准地呈现海岸线与五大湖轮廓。原始的水体面积（AWATER）与陆地面积（ALAND）字段仍作为属性保留在数据表中，单位为平方米。 州级图层包含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。 位于海洋等水域区域的无人口普查区块组（编号以99开头）已从本数据服务中移除。 百分比、衍生计数及对应的边际误差均为计算值（可通过字段名中的"_calc_"标识识别），且符合美国社区调查的相关规范。字段别名基于美国社区调查汇总文件文档页面提供的"表框架（Table Shells）"文件生成。 除-5555…已被设置为0外，其余负值（如-4444…）均已被设置为空值。原始API数据中的这些负值用于表示以下场景： 1. 边际误差列代表：无抽样观测值或抽样观测值过少，无法计算标准误及边际误差，此时不适合进行统计检验； 2. 无抽样观测值或抽样观测值过少，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. 估算值为受控值； 6. 不适合进行抽样变异性统计检验； 7. 因抽样案例数量过少，无法展示该地理区域的数据。