Maryland Archived American Community Survey - Archived ACS ZIP Code Tabulation Areas - 2009 to 2013

The American Community Survey (ACS) is a nationwide, continuous survey designed to provide communities with reliable and timely demographic, housing, social and economic data. The ACS replaces the decennial census long form in 2010 and every year thereafter. The annual ACS sample is smaller than that of previous long form surveys resulting in a larger sampling error. Coefficients of Variation (CVs), which are statistical measures that show the relative amount of sampling error associated with an estimate, are presented here as a measure of reliability and usability of the data. The unit of geography used for the 2009 - 2013 data is the ZIP Code Tabulation Area (ZCTA). ZCTAs are statistical geographic areas produced by the Census Bureau by aggregating census blocks to create generalized areas closely resembling the U.S. Postal Service's postal ZIP codes. This is a MD iMAP hosted service. Find more information on https://imap.maryland.gov. Feature Service Link: https://mdgeodata.md.gov/archive/rest/services/Demographics/MD_ArchivedAmericanCommunitySurvey/FeatureServer/3美国社区调查（American Community Survey，ACS）是一项全国性、持续性的调查，旨在为各社区提供可靠且及时的人口统计、住房、社会与经济数据。该调查自2010年起取代十年一次人口普查的长表，并在此后每年持续开展相关工作。年度美国社区调查的样本规模小于此前的长表调查，因此抽样误差更大。变异系数（Coefficients of Variation，CVs）是用于衡量估算值关联抽样误差相对幅度的统计指标，本次数据集以此作为评判数据可靠性与可用性的依据。2009-2013年数据集所采用的地理统计单元为邮政编码制表区域（ZIP Code Tabulation Area，ZCTA）。邮政编码制表区域是美国人口普查局通过整合人口普查区块，构建出与美国邮政服务邮政编码高度相似的广义地理统计区域。本数据集为马里兰州iMAP托管服务。更多信息请访问 https://imap.maryland.gov。要素服务链接：https://mdgeodata.md.gov/archive/rest/services/Demographics/MD_ArchivedAmericanCommunitySurvey/FeatureServer/3