Big Ten Academic Alliance Geospatial Discovery Portal

Big Ten Academic Alliance Geoportal

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Maryland Road Centerlines - Comprehensive: State of Maryland

2017. ArcGIS Online for Maryland. This is a MD iMAP hosted service. Find more information at https://imap.maryland.gov.Maryland Roadway Centerline data consists of linear geometric ...

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Maryland Highway Performance Monitoring System - Roadway Maintenance Responsibility: Maryland, United States

ArcGIS Online for Maryland. This is a MD iMAP hosted service layer. Find more information at http://imap.maryland.gov.Roadway Maintenance Responsibility data consists of linea...