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Demographics/MD_AmericanCommunitySurvey (FeatureServer)

View In:   ArcGIS Online Map Viewer

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

All Layers and Tables

Has Versioned Data: false

MaxRecordCount: 2000

Supported Query Formats: JSON

Supports Query Data Elements: true

Layers: Description:

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

Spatial Reference: 102100  (3857)

Initial Extent: Full Extent: Units: esriMeters

Document Info: Enable Z Defaults: false

Supports ApplyEdits With Global Ids: false

Support True Curves : true

Only Allow TrueCurve Updates By TrueCurveClients : false

Supports Dynamic Layers: false

Child Resources:   Info   Query Data Elements   Relationships

Supported Operations:   Query   QueryDomains   Query Contingent Values   Create Replica