November 2016

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Overview

This statewide point data layer represents milepost locations on numbered routes throughout the state, with one point for each sign marking the mileage along Interstate, US and state highways. This layer was developed by the Massachusetts Department of Transportation (MassDOT) Office of Transportation Planning GIS Services group. MassGIS added the LABEL, TOWN and ZIP fields and projected the data to the Mass. State Plane Mainland meters coordinate system.

  Mile Marker       

MassGIS stores the data as SETB.MILEPOSTS.

Attributes

The point attribute table contains the following populated fields:
ROUTE_ID Route number, with administrative type prefix and directional indicator suffix. Prefixes are: "I" (Interstate), "US" (US Route), and "SR" (State Route).
MEASURE The measure in miles along the route where the sign is located
MILE_POINT Mile distance as posted on physical sign
GPS_X X coordinate of the sign in Mass. State Plane Mainland meters, as recorded by GPS.
GPS_Y Y coordinate of the sign in Mass. State Plane Mainland meters, as recorded by GPS.
LABEL Used by MassGIS to simplify display where markers exist on both sides of a highway. LABEL = "Y" will draw only one point with the same mile measure on a route.
TOWN Name of municipality in which the sign is located.
ZIP ZIP Code in which the sign is located

Maintenance

MassDOT maintains the original dataset, which may be viewed and downloaded at its Open Data Portal page.

Last Updated 11/29/2016