Migration 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区域委员会（Atlanta Regional Commission, ARC）研究与创新团队开发，数据源自美国人口普查局（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。如需深入了解涵盖所有具体指标的数据模型，请参阅《ACS 2020-2024数据手册》（ACS 2020-2024 Data Manifest）。该手册详细说明了ARC定义的命名规范、字段名称/描述与主题、汇总层级、源数据表及相关说明等所有指标相关内容。下文将列出命名约定的前缀/后缀、地理区域定义及用户须知。 ### 命名前缀说明： None：无特殊标识 Count：计数 p：百分比（Percent） r：比率（Rate） m：中位数（Median） a：均值（平均数，Mean (average)） t：汇总值（总计，Aggregate (total)） ch：绝对变化量（t₂时刻值减t₁时刻值，Change in absolute terms (value in t2 - value in t1)） pch：百分比变化（(t₂时刻值 - t₁时刻值)/t₁时刻值，Percent change ((value in t2 - value in t1) / value in t1)） chp：百分比点变化（t₂时刻百分比减t₁时刻百分比，Change in percent (percent in t2 - percent in t1)） s：变化显著性标记：1表示在90%置信区间内具有统计学显著性，0表示无统计学显著性，空白表示无法计算（Significance flag for change: 1 = statistically significant with a 90% CI, 0 = not statistically significant, blank = cannot be computed） ### 命名后缀说明： _e24：2020-2024年美国社区调查（American Community Survey, ACS）估算值 _m24：2020-2024年ACS的误差边际（Margin of Error, MOE） _e10：2006-2010年ACS估算值，已重新适配至2020年地理分区 _m10：2006-2010年ACS的误差边际，已重新适配至2020年地理分区 _e10_24：2010-2024年变化量（地理分区固定为2020年标准） ### 地理区域列表： AAA：老年服务区域局（Area Agency on Aging，由覆盖全州的12个县组成的地理单元） ARC21：亚特兰大区域委员会建模区域（21个县合并为单个地理单元） ARWDB7：亚特兰大区域劳动力发展局（7个县合并为单个地理单元） BeltLineStatistical (buffer)：BeltLine统计缓冲区 BeltLineStatisticalSub (subareas)：BeltLine统计子区域 Census Tract (statewide)：全州普查街区 City (statewide)：全州城市单元 City of Atlanta Council Districts (City of Atlanta)：亚特兰大市议会选区（仅限亚特兰大市） City of Atlanta Neighborhood Planning Unit (City of Atlanta)：亚特兰大市社区规划单元（仅限亚特兰大市） City of Atlanta Neighborhood Statistical Areas (City of Atlanta)：亚特兰大市社区统计区域（仅限亚特兰大市） County (statewide)：全州县级单元 County Commission Districts (statewide where applicable)：全州县级委员会选区（适用时） County Commission Superdistricts (DeKalb)：迪卡尔布县县级委员会超级选区 Georgia House (statewide)：全州佐治亚州众议院选区 Georgia Senate (statewide)：全州佐治亚州参议院选区 HSSA：高中统计区域（High School Statistical Area，覆盖11个县的区域） MetroWater15：亚特兰大都会水区（15个县合并为单个地理单元） Regional Commissions (statewide)：全州区域委员会单元 State of Georgia (single geographic unit)：佐治亚州全域（单个地理单元） Superdistrict (ARC region)：超级选区（亚特兰大区域委员会辖区） US Congress (statewide)：全州美国国会选区 UWGA13：大亚特兰大联合之路（13个县合并为单个地理单元） ZIP Code Tabulation Areas (statewide)：全州邮编统计区域 ### 用户须知： 需注意，美国社区调查（ACS）数据均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（十年一次的完整人口普查仅能覆盖有限的人口详细特征）。因此，ACS发布的各项指标不应被视为精确数值——这也是ACS指标同时附带对应误差边际（MOE）的原因。误差边际与对应估算值的相对大小可反映估算准确性的置信水平。误差边际的计量单位与对应指标完全一致：例如，若估算值为数值型，则误差边际亦为数值型；若估算值为百分比，则误差边际亦为百分比。 此外需注意，对于普查街区等较小地理区域，ACS仅发布合并后的5年周期估算值，即此类估算值为5年（本数据集为2020-2024年）调查结果的滚动平均值，因此无法代表某一特定时间点或单一自然年份的数据。不得在5年时间序列内或重叠时间序列年份之间进行变化量分析。亚特兰大区域委员会已针对ARC人口普查数据目录中展示的内容准备了变化数据集。如需进一步了解ACS估算值与误差边际的相关说明，请访问美国人口普查局ACS官方网站。 ### 数据基本信息： 数据来源：美国人口普查局、亚特兰大区域委员会 数据时间范围：2020-2024年 数据许可：知识共享署名4.0国际许可协议（Creative Commons Attribution 4.0 International, CC BY 4.0）