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Demographics/MD_AmericanCommunitySurvey (MapServer)

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View Footprint In:   ArcGIS Online Map Viewer

Service Description: 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 2012 - 2016 data is the census tract - a small statistical area within a county, which is delineated every 10 years prior to the decennial census. The other unit of geography used for the 2012 - 2016 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. Please note that this is only a small portion of the data collected as part of the American Community Survey. For more information please see

Map Name: Layers


All Layers and Tables

Dynamic Legend

Dynamic All Layers

Layers: Description:

Copyright Text: MD iMAP, MDP, U.S. Census

Spatial Reference: 102100  (3857)

Single Fused Map Cache: false

Initial Extent: Full Extent: Units: esriMeters


Document Info: Supports Dynamic Layers: true

MaxRecordCount: 2000

MaxImageHeight: 4096

MaxImageWidth: 4096

Supported Query Formats: JSON, geoJSON

Min Scale: 0

Max Scale: 0

Supports Datum Transformation: true

Child Resources:   Info   Dynamic Layer

Supported Operations:   Export Map   Identify   QueryDomains   QueryLegends   Find   Return Updates   Generate KML

Supported Extensions:   MDiMAPDataDownload