Overlays
The following overlays are currently supported.
Digital Britannia v1
Source and license: https://roadsofromanbritain.org/digital-britannia/downloads.html
Listed Buildings (Cambridge)
Source: https://3csharedservicesopendata-cambridgeonline.hub.arcgis.com/datasets/674f4bdf3f704b8982345284e27b7c8c_0/about
License: https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/
Listed Buildings (South Cambs)
Source: https://3csharedservicesopendata-cambridgeonline.hub.arcgis.com/datasets/CambridgeOnline::south-cambs-district-council-listed-buildings/about
License: https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/
National Heritage List for England
Source: https://opendata-historicengland.hub.arcgis.com/datasets/historicengland::national-heritage-list-for-england-nhle/about?layer=3
License: https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/
Conservation Areas (Cambridge)
Source: https://3csharedservicesopendata-cambridgeonline.hub.arcgis.com/datasets/CambridgeOnline::cambridge-city-council-conservation-areas/about
License: https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/
Conservation Areas (South Cambs)
Source: https://3csharedservicesopendata-cambridgeonline.hub.arcgis.com/datasets/CambridgeOnline::south-cambs-district-council-conservation-areas/about
License: https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/
Conservation Areas (Historic England)
Source: https://historicengland.hub.arcgis.com/datasets/historicengland::conservation-areas/about
License: https://historicengland.org.uk/terms/website-terms-conditions/open-data-hub/
Local Heritage List (Cambs)
Source: https://local-heritage-list.org.uk/cambridgeshire
Parishes and Non-Civil Parished Areas (May 2026)
Source: https://geoportal.statistics.gov.uk/datasets/ons::parishes-and-non-civil-parished-areas-may-2026-boundaries-ew-bgc/about
License: https://www.ons.gov.uk/methodology/geography/licences
Historic England Research Spatial Reports
Source: https://historicengland.hub.arcgis.com/maps/e08a1ca270ac4caa8ba5efcb74f86a74/about
License: https://historicengland.org.uk/terms/website-terms-conditions/open-data-hub/
Sources of Mapping data
