22 ESRI shapefiles include: subway exits, public facilities (parking meters, manholes, bus shelter, traffic light, etc.), landmarks (schools, libraries, major buildings, etc.), spot elevation, digital terrain maps, railroads, MBTA Train (Red line), street centerlines, major transportation features (roads, railroads, parking lots, etc.), minor transportation features (driveways, paths, etc.), contour lines (2-foot), historic sites, open space, parcels, building footprints, neighborhoods (as defined by the City of Cambridge), historic conservation sites, zoning, border of the City of Cambridge, hydrologic features, 50 Foot Grid Index, 100 Foot Grid index.