Lists

Composite Locator Data Sources

The reference data for Maryland's Composite Locator was provided by State agencies, including, the Maryland Department of Planning (MDP) and the Maryland State Highway Administration (SHA). Local jurisdictions are also primary da​ta providers.

Cascade Order Source Data Name Approximate Spatial Accuracy of Returned Match Data Contributor Name
1 Local Address Points Within Footprint of Address Structure Local Jurisdictions
2 MDProperty View Parcel Points Center of the Land Parcel on Which the Address Sits MDP
3 Statewide Road Centerlines​ Prorated Point Along a Line Segment with a Theoretical Address Range Local Jurisdictions
4 Places* Varies Multiple
5 Highway Exits Vicinity of the Highway Ramp SHA
6 Mile Markers Vicinity of the Mile Marker Along a Major Road/Highway SHA
7 ZIP Codes Centroid of the ZIP code boundary MDP

Places* locator combines multiple location datasets into one combined locator.​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​

Cascade Order Source Data Name Approximate Spatial Accuracy of Returned Match Data Contributor Name
4a Geographic Names Information System Varies USGS
4b Community Anchors Typically Located on Structure Multiple Sources
4c Points of Interest Varies SHA
4d Municipalities and Census Centroid of the Municipality Boundary Multiple
4e Designated Places Census Designated Place Boundary US Census
4f Neighborhoods Baltimore City Neighborhood Centroid Baltimore City

Please contact the GIO Office at service.desk@maryland.gov for more information.​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​