From:Robert K. Nelson, LaDale Winling, Richard Marciano, Nathan Connolly, et al., “Mapping Inequality,” American Panorama, ed. Robert K. Nelson and Edward L. Ayers, accessed May 26, 2021

Georectified HOLC map of greater Boston.

1930's HOLC grades in greater Boston.Robert K. Nelson, LaDale Winling, Richard Marciano, Nathan Connolly, et al., “Mapping Inequality,” American Panorama, ed. Robert K. Nelson and Edward L. Ayers

Boston Banks Urban Renewal Group (BBURG) lending boundaries, 1971. Image from The Boston Globe (georectified).1930's HOLC Maps of Greater Boston. Data from University of Richmond's Mapping Inequality Project

HOLC appraiser descriptions in greater Boston (table)Digitized from University of Richmond's Digital Scholarship Lab "American Panorama"

In spring 2013 and 2014, the U.S. Geological Survey contracted for true-color imagery covering three urban areas in Massachusetts as defined by the USGS. Those areas are the metropolitan Boston area (and beyond), the greater Worcester area, and the greater Springfield area. Image type for all of the areas is 24 bit, 4-band (red, green, blue, and near-infrared RGBN) portions of the spectrum. Each band has pixel values ranging 0-255. Pixel resolution is 0.3 meters (30 centimeters), or approximately one foot.This digital orthoimagery can serve a variety of purposes, from general planning, to field reference for spatial analysis, to a tool for data development and revision of vector maps. It can also serve as a reference layer or basemap for myriad applications inside geographic information system (GIS) software.It was created to provide easily accessible geospatial data which is readily available to enhance the capability of Federal, State, and local emergency responders, as well as plan for homeland security efforts. These data also support The National Map.This image service was created using JPEG 2000 versions of the imagery that MassGIS converted from GeoTiffs and distributes online.For more information see the imagery's MassGIS metadata page.

These data layers represent bus routes and stops within the Massachusetts Bay Transportation Authority (MBTA) public transit system. The layers were developed by the Central Transportation Planning Staff (CTPS) of the Boston Region Metropolitan Planning Organization.The bus routes include the many local variations during the course of a day along each primary route, such as a short turn or a spur into a shopping center. Each "variant" (including inbound and outbound routes) is represented by its own feature, resulting in coincident or "stacked" arcs. Each bus stop point has a unique identifier (STOP_ID), with a different point for stops on both sides of the road (for inbound and outbound bus routes).