Demographic change 2010 - 2024 (all geographies, statewide)

These data were developed by the Research & Innovation group at the Atlanta Regional Commission using data from the U.S. Census Bureau across all standard and custom geographies statewide where applicable. For a deep dive into the data model including every specific metric, see the ACS 2020-2024 Data Manifest. The manifest details ARC-defined naming conventions, field names/descriptions and topics, summary levels; source tables; notes and so forth for all metrics. Find naming convention prefixes/suffixes, geography definitions and user notes below. Prefixes: None Count p Percent r Rate m Median a Mean (average) t Aggregate (total) ch Change in absolute terms (value in t2 - value in t1) pch Percent change ((value in t2 - value in t1) / value in t1) chp Change in percent (percent in t2 - percent in t1) s Significance flag for change: 1 = statistically significant with a 90% CI, 0 = not statistically significant, blank = cannot be computed Suffixes: _e24 Estimate from 2020-24 ACS _m24 Margin of Error from 2020-24 ACS _e10 2006-10 ACS, re-estimated to 2020 geography _m10 Margin of Error from 2006-10 ACS, re-estimated to 2020 geography _e10_24 Change, 2010-24 (holding constant at 2020 geography) Geographies AAA = Area Agency on Aging (12 geographic units formed from counties providing statewide coverage) ARC21 = Atlanta Regional Commission modeling area (21 counties merged to a single geographic unit) ARWDB7 = Atlanta Regional Workforce Development Board (7 counties merged to a single geographic unit) BeltLineStatistical (buffer) BeltLineStatisticalSub (subareas) Census Tract (statewide) City (statewide) City of Atlanta Council Districts (City of Atlanta) City of Atlanta Neighborhood Planning Unit (City of Atlanta) City of Atlanta Neighborhood Statistical Areas (City of Atlanta) County (statewide) County Commission Districts (statewide where applicable) County Commission Superdistricts (DeKalb) Georgia House (statewide) Georgia Senate (statewide) HSSA = High School Statistical Area (11 county region) MetroWater15 = Atlanta Metropolitan Water District (15 counties merged to a single geographic unit) Regional Commissions (statewide) State of Georgia (single geographic unit) Superdistrict (ARC region) US Congress (statewide) UWGA13 = United Way of Greater Atlanta (13 counties merged to a single geographic unit) ZIP Code Tabulation Areas (statewide) The user should note that American Community Survey data represent estimates derived from a surveyed sample of the population, which creates some level of uncertainty, as opposed to an exact measure of the entire population (the full census count is only conducted once every 10 years and does not cover as many detailed characteristics of the population). Therefore, any measure reported by ACS should not be taken as an exact number – this is why a corresponding margin of error (MOE) is also given for ACS measures. The size of the MOE relative to its corresponding estimate value provides an indication of confidence in the accuracy of each estimate. Each MOE is expressed in the same units as its corresponding measure; for example, if the estimate value is expressed as a number, then its MOE will also be a number; if the estimate value is expressed as a percent, then its MOE will also be a percent. The user should also note that for relatively small geographic areas, such as census tracts, ACS only releases combined 5-year estimates, meaning these estimates represent rolling averages of survey results that were collected over a 5-year span (in this case 2020-2024). Therefore, these data do not represent any one specific point in time or even one specific year. Change analysis within a five year time series or between overlapping time series years should not be performed. ARC has prepared change datasets as shown on the ARC Census Data Directory. For further explanation of ACS estimates and margin of error, visit Census ACS website. Source: U.S. Census Bureau, Atlanta Regional Commission Date: 2020-2024 Data License: Creative Commons Attribution 4.0 International (CC by 4.0)本数据集由亚特兰大地区委员会（Atlanta Regional Commission, ARC）研究与创新团队开发，数据来源于美国人口普查局（U.S. Census Bureau），覆盖全州范围内所有适用的标准及自定义地理区域。 若需深入了解涵盖所有具体指标的数据模型，请参阅《美国社区调查（American Community Survey, ACS）2020-2024数据手册》。该手册详细说明了ARC定义的命名规范、字段名称/描述及主题、汇总层级、源数据表、相关说明等所有指标相关内容。下文将列出命名规范的前缀/后缀、地理区域定义及用户须知。 命名前缀规则如下： None：无统计量；Count：计数；p：百分比；r：比率；m：中位数；a：均值（平均数）；t：总计值；ch：绝对变化量（t2时刻值 - t1时刻值）；pch：百分比变化率（(t2时刻值 - t1时刻值)/t1时刻值）；chp：百分点变化量（t2时刻百分比 - t1时刻百分比）；s：变化显著性标记：1=置信区间（Confidence Interval, CI）90%水平下具有统计学显著性，0=无统计学显著性，空白=无法计算 命名后缀规则如下： _e24：2020-2024年ACS估算值；_m24：2020-2024年ACS边际误差（Margin of Error, MOE）；_e10：2006-2010年ACS估算值，已重新适配至2020年地理区域；_m10：2006-2010年ACS边际误差，已重新适配至2020年地理区域；_e10_24：2010-2024年变化量（地理区域固定为2020年标准） 地理区域类型包括： AAA：老年服务区域局（Area Agency on Aging），由覆盖全州的12个县级地理单元合并而成；ARC21：亚特兰大地区委员会建模区域（由21个县合并为单一地理单元）；ARWDB7：亚特兰大地区劳动力发展委员会（Atlanta Regional Workforce Development Board），由7个县合并为单一地理单元；BeltLineStatistical（缓冲区）：BeltLine统计区域；BeltLineStatisticalSub（子区域）：BeltLine统计子区域；普查街区（全州范围）；城市（全州范围）；亚特兰大市议会选区（亚特兰大市）；亚特兰大市社区规划单元（亚特兰大市）；亚特兰大市社区统计区域（亚特兰大市）；县（全州范围）；县议会选区（全州适用范围）；迪卡尔布县议会超级选区；佐治亚州众议院选区（全州范围）；佐治亚州参议院选区（全州范围）；HSSA：高中统计区域（High School Statistical Area），由11个县组成的区域；MetroWater15：亚特兰大都市供水区（由15个县合并为单一地理单元）；地区委员会（全州范围）；佐治亚州（单一地理单元）；超级选区（ARC区域）；美国国会选区（全州范围）；UWGA13：大亚特兰大联合劝募会（United Way of Greater Atlanta），由13个县合并为单一地理单元；邮政编码统计区域（ZIP Code Tabulation Areas, ZCTA，全州范围） 用户须知：美国社区调查（ACS）数据均为基于人口抽样调查得出的估算值，存在一定不确定性，而非针对全体人口的精确统计量（美国十年一次的人口普查仅能获取全体人口的精确计数，且未涵盖如此多的人口细分特征）。因此，ACS公布的任何统计量均不应被视为精确数值——这也是ACS统计量同步附带对应边际误差（MOE）的原因。边际误差与对应估算值的相对大小可反映该估算值准确性的置信水平。边际误差的单位与对应统计量的单位完全一致：例如，若估算值为数值型，则边际误差亦为数值型；若估算值为百分比，则边际误差亦为百分比。 用户还需注意，对于普查街区等较小的地理区域，ACS仅发布合并后的5年周期估算值，即此类估算值为5年（本数据集中为2020-2024年）调查收集的滚动平均结果。因此，此类数据并不代表某一特定时间点或某一具体年份的情况，不应在5年时间序列内或重叠的时间序列年份之间进行变化分析。ARC已在其《亚特兰大地区委员会人口普查数据目录》中提供了相应的变化数据集。如需进一步了解ACS估算值与边际误差的相关说明，请访问美国人口普查局ACS官方网站。 数据来源：美国人口普查局（U.S. Census Bureau）、亚特兰大地区委员会（Atlanta Regional Commission）；数据采集周期：2020-2024年；数据许可协议：知识共享署名4.0国际版（Creative Commons Attribution 4.0 International, CC BY 4.0）