This is a MD iMAP hosted service layer. Find more information at http://imap.maryland.gov. The centerline is a data sharing process between the State Highway Administration (SHA) and local governments. Using a common centerline allows better exchange of information about the roadway system and provides opportunities for more efficient collection of information about that roadway asset. Some centerlines were created in-house using imagery - GPS data - and SHA's HPMS database and others were received from county governments and updated in house using imagery - GPS data and SHA's HPMS. The centerline data includes annual HPMS updates/improvements.This layer has been modified from its original form. Please see lineage section for details. Last Updated: 06/2013 Feature Service Layer Link: http://geodata.md.gov/imap/rest/services/Transportation/MD_RoadCenterlines/MapServer/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.