Geographic Information Systems (GIS) : Buildings and Transportation

MIT's geodata repository contains building outlines for Cambridge, Boston metro area, Houston, Manhattan and New Orleans. Detailed parcel data is available for New York City and Boston. New data is continually added so search to find the latest data.

A comprehensive, statewide database of spatial information for mapping and analysis supporting emergency response, environmental planning and management, transportation planning, economic development, and transparency in state government operations.

The National Transportation Atlas Database is a set of nationwide geographic databases of transportation facilities, transportation networks, and associated infrastructure. These datasets include spatial information for transportation modal networks and intermodal terminals, as well as the related attribute information for these features.

Historic railroad .shp and .kml files that were created as a part of a project on visualizing railroad history.