MD iMAP: Maryland American Community Survey - ACS Census Tracts

This is a MD iMAP hosted service. Find more information at http://imap.maryland.gov. 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 2010 - 2014 data is the census tract - a small statistical area within a county - which is delineated every 10 years prior to the decennial census.Feature Service Link:http://geodata.md.gov/imap/rest/services/Demographics/MD_AmericanCommunitySurvey/FeatureServer/0 ADDITIONAL LICENSE TERMS: The Spatial Data and the information therein (collectively "the Data") is provided "as is" without warranty of any kind either expressed implied or statutory. The user assumes the entire risk as to quality and performance of the Data. No guarantee of accuracy is granted nor is any responsibility for reliance thereon assumed. In no event shall the State of Maryland be liable for direct indirect incidental consequential or special damages of any kind. The State of Maryland does not accept liability for any damages or misrepresentation caused by inaccuracies in the Data or as a result to changes to the Data nor is there responsibility assumed to maintain the Data in any manner or form. The Data can be freely distributed as long as the metadata entry is not modified or deleted. Any data derived from the Data must acknowledge the State of Maryland in the metadata.

此乃由马里兰州地理信息系统（MD iMAP）提供的托管服务。更多详细信息可访问 http://imap.maryland.gov。美国社区调查（ACS）是一项全国性的连续调查，旨在为社区提供可靠且及时的人口、住房、社会和经济数据。该调查自2010年起取代了每十年一次的长期人口普查表，并每年进行更新。相较于先前长期调查的年度样本，ACS的年度样本量较小，导致抽样误差较大。本数据集展示了变异系数（CVs），作为一种统计指标，用以展示与估计值相关的抽样误差的相对量，以此作为数据可靠性和可用性的衡量标准。2010-2014年数据所使用的地理单位为普查区——县内的一个小型统计区域，每十年在人口普查前进行划分。服务链接：http://geodata.md.gov/imap/rest/services/Demographics/MD_AmericanCommunitySurvey/FeatureServer/0。附加许可条款：所提供的数据及其相关信息（统称为“数据”）以“现状”提供，不提供任何形式的保证，无论是明示、暗示还是法定保证。用户承担与数据质量和性能相关的全部风险。不提供准确性保证，也不承担对此的依赖责任。在任何情况下，马里兰州政府不对直接、间接、偶然、后果性或特殊性质的任何类型的损害负责。马里兰州不对因数据不准确或数据变更引起的任何损害或误述承担责任，也不承担以任何方式或形式维护数据的责任。只要不修改或删除元数据条目，数据可以自由分发。任何源自数据的衍生数据必须在元数据中承认马里兰州。