The boundaries of the district polygons are both modified and unmodified pre-existing polygons provided by NPS and SHPO, as well as new, previously unmapped districts. For the previously unmapped districts, the boundaries were defined by any maps provided by the associated resource PDF, for resources that lacked a map the boundaries were drawn based on point location. The boundaries of these district polygons may not be reflective of the boundaries as interpreted by local governments.

Please refer to the local ordinances for specific local boundary information.

These points are directly sourced from the National Historic Landmarks, National Register, State Register, Local Historic Districts, Local Historic Places, Historic Resources inventories, CHC files, Connecticut Barns listings, Connecticut Arts & letters listings, Connecticut Making Places listings, Connecticut Freedom Trail listings, and various special surveys (Sculpture, Civil War Monuments, Municipal Parks, Town Greens, Historic Bridges). If a resource appears in multiple pdfs, it will appear as one entry.

The geolocation of these points is based on the addresses and pre-existing maps that appear in the associated pdfs of the resources. Some resources were unable to be geolocated; but will still appear in the attribute table of this layer.

The following is a list of the sources for each resource with their associated designation:

1). National Historic Landmark (NHL); with the designation “NHL”.

2). National Register (NR); with the designation “NRIND” for individual resources or NRDIS for NR Districts. A “-C” or a “-NC” is added at the end of NRIND or NRDIS to indicate if it is a contributing or non-contributing resource.

3). Restricted National Register (RNR); with the designation “NRIND” for individual resources or NRDIS for NR Districts. A “-C” or a “-NC” is added at the end of NRIND or NRDIS to indicate if it is a contributing or non-contributing resource. These resources are not geolocated and their pdfs are no available to be viewed on the

These points are directly sourced from the National Historic Landmarks, National Register, State Register, Local Historic Districts, Local Historic Places, Historic Resources inventories, CHC files, Connecticut Barns listings, Connecticut Arts & letters listings, Connecticut Making Places listings, Connecticut Freedom Trail listings, and various special surveys (Sculpture, Civil War Monuments, Municipal Parks, Town Greens, Historic Bridges). If a resource appears in multiple pdfs, it will appear as one entry.

The geolocation of these points is based on the addresses and pre-existing maps that appear in the associated pdfs of the resources. Some resources were unable to be geolocated; but will still appear in the attribute table of this layer.

The following is a list of the sources for each resource with their associated designation:

1). National Historic Landmark (NHL); with the designation “NHL”.

2). National Register (NR); with the designation “NRIND” for individual resources or NRDIS for NR Districts. A “-C” or a “-NC” is added at the end of NRIND or NRDIS to indicate if it is a contributing or non-contributing resource.

3). Restricted National Register (RNR); with the designation “NRIND” for individual resources or NRDIS for NR Districts. A “-C” or a “-NC” is added at the end of NRIND or NRDIS to indicate if it is a contributing or non-contributing resource. These resources are not geolocated and their pdfs are no available to be viewed on the