{"@context":"https://schema.org","archive":{"base_url":"https://boston.fyi","csts_conformance":"provisional","csts_profile":"CSTS-01/ARCHIVE","name":"The Boston Archive","subject":"Boston, Massachusetts"},"canonical_url":"https://boston.fyi/place/thompson-island","json_ld":{"@context":"https://schema.org","@graph":[{"@id":"https://boston.fyi/#archive","@type":"ArchiveOrganization","archiveHeld":{"@type":"ArchiveComponent","about":"Boston, Massachusetts","name":"The The Boston Archive holdings"},"conformsTo":"https://boston.fyi/standards/csts-01-reference-profile","description":"The Boston Archive is the authority source for one subject. It holds the public civic record of Boston, Massachusetts — its places, people, organizations, events, works, and objects; the documents and datasets that attest them; and the grey record of what people say about the city that no authority ever wrote down. Every record carries a stable identifier, a canonical address, a full provenance chain, and its version history. Every record resolves as a page for a person and as JSON for a machine.","email":"archive@boston.fyi","founder":{"@type":"Person","name":"LeMay Inc."},"foundingDate":"2026","name":"The Boston Archive","slogan":"The record of one city, held whole.","url":"https://boston.fyi"},{"@id":"https://boston.fyi/#website","@type":"WebSite","conformsTo":"https://boston.fyi/standards/csts-01-reference-profile","inLanguage":"en","name":"The Boston Archive","potentialAction":{"@type":"SearchAction","query-input":"required name=search_term_string","target":{"@type":"EntryPoint","urlTemplate":"https://boston.fyi/ask?q={search_term_string}"}},"publisher":{"@id":"https://boston.fyi/#archive"},"url":"https://boston.fyi"},{"@id":"https://boston.fyi/place/thompson-island#provenance","@type":"CreativeWork","additionalProperty":[{"@type":"PropertyValue","name":"sourceCollection","value":"City of Boston Open Data Portal (Analyze Boston)"},{"@type":"PropertyValue","name":"licenseName","value":"Open Data Commons Public Domain Dedication and Licence (PDDL) 1.0"},{"@type":"PropertyValue","name":"licenseOpenness","value":"public_domain"},{"@type":"PropertyValue","name":"retrievedAt","value":"2026-09-02T22:38:17.221385+00:00"},{"@type":"PropertyValue","name":"transformCount","value":3}],"creator":{"@type":"Organization","name":"City of Boston Open Data Portal (Analyze Boston)"},"creditText":"City of Boston","dateCreated":"2026-09-02T22:38:17.221385+00:00","isBasedOn":"https://data.boston.gov/dataset/open-space","license":"https://opendatacommons.org/licenses/pddl/1-0/","name":"Provenance of Thompson Island"},{"@id":"https://boston.fyi/place/thompson-island","@type":"Place","additionalProperty":[{"@type":"PropertyValue","name":"recordType","value":"Place"},{"@type":"PropertyValue","description":"official = promulgated by an authority; vernacular = held by attestation alone. The two layers are never merged.","name":"boundaryLayer","value":"official"},{"@type":"PropertyValue","name":"placeType","value":"park"},{"@type":"PropertyValue","name":"boundaryAuthority","value":"City of Boston Parks and Recreation Department"},{"@type":"PropertyValue","name":"areaSquareMetres","value":687511.4789275741}],"conformsTo":"https://boston.fyi/standards/csts-01-reference-profile","containedInPlace":{"@type":"Place","name":"Boston"},"dateCreated":"2026-09-02T22:38:24.871371+00:00","dateModified":"2026-09-02T22:38:24.871371+00:00","description":"Protected open space in the City of Boston open-space inventory. At Boston Harbor, west of Harbor Point, Dorchester.","encoding":{"@type":"MediaObject","contentUrl":"https://boston.fyi/place/thompson-island.json","encodingFormat":"application/json"},"geo":{"@type":"GeoCoordinates","latitude":42.315136299,"longitude":-71.011065638},"hasMap":{"@type":"Map","encodingFormat":"application/geo+json","geometry":{"coordinates":[[[[-70.999568334,42.320252271],[-70.999525849,42.320761747],[-70.999680603,42.320920964],[-70.999864845,42.321156114],[-71.003670137,42.321565591],[-71.005951226,42.321292004],[-71.00687744,42.320923617],[-71.00838747,42.320032756],[-71.009621033,42.3188851],[-71.009807329,42.318404684],[-71.010300746,42.317630727],[-71.011071647,42.316833011],[-71.012273894,42.316145788],[-71.016560263,42.314385443],[-71.016991427,42.314045051],[-71.01736176,42.31348887],[-71.01742405,42.312876116],[-71.016931511,42.31165954],[-71.016654581,42.311294833],[-71.016654863,42.311114864],[-71.016346984,42.310705461],[-71.015792971,42.310157005],[-71.014867895,42.30978686],[-71.013882262,42.309785396],[-71.013850703,42.309993683],[-71.01459081,42.310061903],[-71.015083178,42.310358921],[-71.014498144,42.310567572],[-71.013758757,42.310562735],[-71.013018387,42.310196958],[-71.012464202,42.309675134],[-71.012217935,42.309239242],[-71.011940868,42.309054494],[-71.011724864,42.309193484],[-71.011138142,42.310563141],[-71.010675485,42.311085148],[-71.00839341,42.313394677],[-71.008022998,42.313950919],[-71.007004257,42.315887155],[-71.006850141,42.316096804],[-71.00681877,42.31627754],[-71.006355474,42.316871641],[-71.005739493,42.317350115],[-71.005060235,42.318379927],[-71.003641548,42.319549063],[-71.002994746,42.31982158],[-71.002007465,42.320009791],[-71.001205698,42.319978675],[-71.000589836,42.319818268],[-70.999820436,42.319345415],[-70.999217142,42.319406889],[-70.999568334,42.320252271]]]],"type":"MultiPolygon"},"name":"Boundary of Thompson Island"},"identifier":"urn:lemay:boston:entity:thompson-island","inLanguage":"en","isPartOf":{"@id":"https://boston.fyi/#archive"},"license":"https://opendatacommons.org/licenses/pddl/1-0/","name":"Thompson Island","provenance":{"@id":"https://boston.fyi/place/thompson-island#provenance"},"url":"https://boston.fyi/place/thompson-island","version":1},{"@id":"https://boston.fyi/place/thompson-island#breadcrumbs","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","item":"https://boston.fyi","name":"The Boston Archive","position":1},{"@type":"ListItem","item":"https://boston.fyi/place","name":"Places","position":2},{"@type":"ListItem","item":"https://boston.fyi/place/thompson-island","name":"Thompson Island","position":3}]}]},"json_url":"https://boston.fyi/place/thompson-island.json","record":{"alternate_names":[],"canonical_name":"Thompson Island","canonical_path":"/place/thompson-island","created_at":"2026-09-02T22:38:24.871371Z","description":"Protected open space in the City of Boston open-space inventory. At Boston Harbor, west of Harbor Point, Dorchester.","detail":{"area_sq_m":687511.4789275741,"authority":"City of Boston Parks and Recreation Department","boundary_layer":"official","centroid_geojson":{"coordinates":[-71.011065638,42.315136299],"type":"Point"},"detail_type":"Place","geometry_geojson":{"coordinates":[[[[-70.999568334,42.320252271],[-70.999525849,42.320761747],[-70.999680603,42.320920964],[-70.999864845,42.321156114],[-71.003670137,42.321565591],[-71.005951226,42.321292004],[-71.00687744,42.320923617],[-71.00838747,42.320032756],[-71.009621033,42.3188851],[-71.009807329,42.318404684],[-71.010300746,42.317630727],[-71.011071647,42.316833011],[-71.012273894,42.316145788],[-71.016560263,42.314385443],[-71.016991427,42.314045051],[-71.01736176,42.31348887],[-71.01742405,42.312876116],[-71.016931511,42.31165954],[-71.016654581,42.311294833],[-71.016654863,42.311114864],[-71.016346984,42.310705461],[-71.015792971,42.310157005],[-71.014867895,42.30978686],[-71.013882262,42.309785396],[-71.013850703,42.309993683],[-71.01459081,42.310061903],[-71.015083178,42.310358921],[-71.014498144,42.310567572],[-71.013758757,42.310562735],[-71.013018387,42.310196958],[-71.012464202,42.309675134],[-71.012217935,42.309239242],[-71.011940868,42.309054494],[-71.011724864,42.309193484],[-71.011138142,42.310563141],[-71.010675485,42.311085148],[-71.00839341,42.313394677],[-71.008022998,42.313950919],[-71.007004257,42.315887155],[-71.006850141,42.316096804],[-71.00681877,42.31627754],[-71.006355474,42.316871641],[-71.005739493,42.317350115],[-71.005060235,42.318379927],[-71.003641548,42.319549063],[-71.002994746,42.31982158],[-71.002007465,42.320009791],[-71.001205698,42.319978675],[-71.000589836,42.319818268],[-70.999820436,42.319345415],[-70.999217142,42.319406889],[-70.999568334,42.320252271]]]],"type":"MultiPolygon"},"gnis_feature_id":null,"place_type":"park","within_place_id":"59094999-1a7e-42fc-a665-bf54c5d7e59a","within_place_name":"Boston"},"entity_type":"Place","external_ids":{"address":"Boston Harbor, west of Harbor Point, Dorchester","boston_dataset":"open-space","latitude":42.315212441500066,"longitude":-71.00912154957688},"id":"3f5d1c82-b772-459f-837e-54908674556f","kind":"entity","provenance":{"attribution":"City of Boston","license_id":"odc-pddl","license_name":"Open Data Commons Public Domain Dedication and Licence (PDDL) 1.0","license_url":"https://opendatacommons.org/licenses/pddl/1-0/","openness":"public_domain","retrieved_at":"2026-09-02T22:38:17.221385Z","rights_statement":"Open Data Commons Public Domain Dedication and License (PDDL)","source_id":"city-of-boston-open-data","source_identifier":"13","source_name":"City of Boston Open Data Portal (Analyze Boston)","source_url":"https://data.boston.gov/dataset/open-space","transforms":[{"description":"retrieved the dataset's GeoJSON from the City of Boston open-data portal","input_sha256":null,"operation":"fetch","output_sha256":null,"parameters":{},"performed_at":"2026-09-02T22:38:24.989058Z","seq":1,"tool":"archive-ingest 0.1.0"},{"description":"the source's own name field became the record title; no name was supplied by the archive","input_sha256":null,"operation":"normalize","output_sha256":null,"parameters":{},"performed_at":"2026-09-02T22:38:25.029379Z","seq":2,"tool":"archive-ingest 0.1.0"},{"description":"the source is WGS 84 (EPSG:4326); geometry was set to that SRID without alteration of coordinates","input_sha256":null,"operation":"reproject","output_sha256":null,"parameters":{},"performed_at":"2026-09-02T22:38:25.070880Z","seq":3,"tool":"archive-ingest 0.1.0"}]},"record_kind":"entity","slug":"thompson-island","status":"published","summary":"Protected open space in the City of Boston open-space inventory. At Boston Harbor, west of Harbor Point, Dorchester.","title":"Thompson Island","updated_at":"2026-09-02T22:38:24.871371Z","urn":"urn:lemay:boston:entity:thompson-island","version":1,"withdrawn_reason":null},"related":[{"record":{"canonical_path":"/place/boston","id":"59094999-1a7e-42fc-a665-bf54c5d7e59a","kind":"entity","title":"Boston","urn":"urn:lemay:boston:entity:boston"},"relation":"located_in"}],"urn":"urn:lemay:boston:entity:thompson-island","version_history":[{"change_note":"accessioned from the City of Boston `open-space` file","changed_by":"archive-ingest 0.1.0","recorded_at":"2026-09-02T22:38:25.112252Z","version":1}]}