This polygon layer contains buildings, sites, structures, objects, and districts that have been placed on the National Register of Historic Places in recognition of their importance to American history, culture, or archaeology. National Register designation means that changes to these places must be reviewed if federal or state funds, permits, or licenses are used.
This layer was created for general use by the Cambridge Historical Commission (CHC) and for public distribution. Created for reference purposes as a digital companion to the hard copy National Register atlas kept on file by the CHC.

For more information and download links see:
http://www.cambridgema.gov/GIS/gisdatadictionary/Historical/HISTORICAL_NationalRegisterHistoricPlaces.aspx

This layer contains polygons representing individual properties, usually a single parcel or building. The GIS data layer was created from paper documents. The Historical_LandmarksEasements layer contains individual parcels and buildings that are designated by the City Council as Cambridge Landmarks or that are protected by way of a voluntary donation of a preservation easement (aka preservation restriction) by a property owner to the City’s Historical Commission. Changes to the layer come about a few times a year as new landmarks and easements are so designated.

For more information and download links see:
http://www.cambridgema.gov/gis/gisdatadictionary/historical/historical_landmarkseasements.aspx

This layer contains five polygons representing the city's Neighborhood Conservation Districts (NCDs). Conservation districts are groups of buildings and their surroundings that are architecturally and historically distinctive. Exterior changes to buildings within NCDs are subject to review by NCD commissions made up of residents appointed by the City Manager. The GIS data layer was created in 2000 from paper documents. Cambridge designated its first NCD in 1984, following City Council legislation the year before allowing NCD establishment.

For more information and download links see:
http://www.cambridgema.gov/GIS/gisdatadictionary/Historical/HISTORICAL_NhoodConservationDist.aspx

This layer contains two polygons representing the city's Historic Districts, Fort Washington Historic District and Old Cambridge Historic District. Historic Districts are groups of buildings, structures, and their surroundings that are architecturally and historically distinctive. Exterior changes to buildings within Historic Districts are subject to review by the Historical Commission made up of residents appointed by the City Manager.

For more information and download links see:
http://www.cambridgema.gov/GIS/gisdatadictionary/Historical/HISTORICAL_HistoricDistricts.aspx

View full metadata
https://www.cambridgema.gov/GIS/gisdatadictionary/Historical/HISTORICAL_LandmarksEasements

Description
This layer contains polygons representing individual properties, usually a single parcel or building. The GIS data layer was created from paper documents.

About Edit Dates
This data is automatically updated on a set schedule. The Socrata edit date may not reflect the actual edit dates in the data. For more details please see the update date on the full metadata page or view the edit date within the data rows.

View full metadata
https://www.cambridgema.gov/GIS/gisdatadictionary/Historical/HISTORICAL_HistoricDistricts

Description
This layer contains two polygons representing the city's Historic Districts, Fort Washington Historic District and Old Cambridge Historic District. Historic Districts are groups of buildings, structures, and their surroundings that are architecturally and historically distinctive. Exterior changes to buildings within Historic Districts are subject to review by the Historical Commission made up of residents appointed by the City Manager. The GIS data layer was created from paper documents. Cambridge designated its first Historic Districts in 1963, under the state enabling law, Ch. 40C of the Mass. General Laws.

About Edit Dates
This data is automatically updated on a set schedule. The Socrata edit date may not reflect the actual edit dates in the data. For more details please see the update date on the full metadata page or view the edit date within the data rows.

View full metadata
https://www.cambridgema.gov/GIS/gisdatadictionary/Historical/HISTORICAL_NhoodConservationDist

Description
This layer contains five polygons representing the city's Neighborhood Conservation Districts (NCDs). Conservation districts are groups of buildings and their surroundings that are architecturally and historically distinctive. Exterior changes to buildings within NCDs are subject to review by NCD commissions made up of residents appointed by the City Manager. The GIS data layer was created in 2000 from paper documents. Cambridge designated its first NCD in 1984, following City Council legislation the year before allowing NCD establishment.

About Edit Dates
This data is automatically updated on a set schedule. The Socrata edit date may not reflect the actual edit dates in the data. For more details please see the update date on the full metadata page or view the edit date within the data rows.

View full metadata
https://www.cambridgema.gov/GIS/gisdatadictionary/Historical/HISTORICAL_NationalRegisterHistoricPlaces

Description
This polygon layer contains buildings, sites, structures, objects, and districts that have been placed on the National Register of Historic Places in recognition of their importance to American history, culture, or archaeology. National Register designation means that changes to these places must be reviewed if federal or state funds, permits, or licenses are used.

About Edit Dates
This data is automatically updated on a set schedule. The Socrata edit date may not reflect the actual edit dates in the data. For more details please see the update date on the full metadata page or view the edit date within the data rows.