{"@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/belle-isle-marsh-reservation","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/belle-isle-marsh-reservation#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 Belle Isle Marsh Reservation"},{"@id":"https://boston.fyi/place/belle-isle-marsh-reservation","@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":575074.183212657}],"conformsTo":"https://boston.fyi/standards/csts-01-reference-profile","containedInPlace":{"@type":"Place","name":"Boston"},"dateCreated":"2026-09-02T22:38:53.041373+00:00","dateModified":"2026-09-02T22:38:53.041373+00:00","description":"Protected open space in the City of Boston open-space inventory. At 1399 Bennington Street.","encoding":{"@type":"MediaObject","contentUrl":"https://boston.fyi/place/belle-isle-marsh-reservation.json","encodingFormat":"application/json"},"geo":{"@type":"GeoCoordinates","latitude":42.389199987,"longitude":-70.991638029},"hasMap":{"@type":"Map","encodingFormat":"application/geo+json","geometry":{"coordinates":[[[[-70.994226629,42.393070299],[-70.994358744,42.393128335],[-70.995160474,42.391876847],[-70.995286891,42.391676395],[-70.99542249,42.391472692],[-70.995567627,42.391272671],[-70.995722143,42.391076589],[-70.995885816,42.390884677],[-70.996058487,42.390697176],[-70.996239908,42.390514307],[-70.996429887,42.390336308],[-70.996562592,42.39022455],[-70.995175984,42.389354666],[-70.995518342,42.389045308],[-70.995960732,42.388667862],[-70.996426846,42.388295795],[-70.997507507,42.388217304],[-70.999338968,42.388083051],[-70.99940619,42.388067577],[-70.999482847,42.388053269],[-70.99955877,42.388036974],[-70.999633897,42.388018731],[-70.99970812,42.387998549],[-70.999781369,42.387976445],[-70.999853515,42.387952461],[-70.99992451,42.387926608],[-70.999994237,42.387898941],[-71.000062633,42.387869476],[-71.000129606,42.387838248],[-71.000195078,42.387805302],[-71.00025896,42.387770684],[-71.000321169,42.387734429],[-71.000381655,42.387696575],[-71.000440314,42.38765718],[-71.000497103,42.387616283],[-71.000551925,42.387573943],[-71.000604725,42.387530202],[-71.000655446,42.387485114],[-71.001051438,42.387084287],[-70.999222526,42.386441574],[-70.999177381,42.386512126],[-70.995309345,42.385118039],[-70.995105573,42.385119055],[-70.995073018,42.3852144],[-70.995094033,42.385338989],[-70.993703417,42.386384214],[-70.991769318,42.38641575],[-70.991528362,42.386780023],[-70.990703196,42.387318077],[-70.989989503,42.387584912],[-70.989242025,42.387568272],[-70.988712372,42.387512442],[-70.988402559,42.387483426],[-70.987948791,42.387264888],[-70.98754742,42.387249777],[-70.986781751,42.387110871],[-70.98675993,42.387584866],[-70.987102746,42.387991795],[-70.987483174,42.388358737],[-70.987808684,42.388834278],[-70.988004609,42.389430331],[-70.987962723,42.389998587],[-70.9876108,42.39071338],[-70.987276728,42.391442565],[-70.98729075,42.391929954],[-70.987471334,42.392201655],[-70.987979962,42.392473915],[-70.989418025,42.392858966],[-70.990439456,42.392904457],[-70.990768361,42.392798149],[-70.991170643,42.392704588],[-70.991865318,42.39255884],[-70.992596183,42.392413248],[-70.992801532,42.392489507],[-70.993030589,42.392495586],[-70.993321234,42.392496866],[-70.993563358,42.392579044],[-70.994017342,42.392679894],[-70.994356204,42.392638294],[-70.994368402,42.392823382],[-70.994251313,42.39292679],[-70.994226629,42.393070299]]],[[[-70.994681252,42.383742204],[-70.994704704,42.383816311],[-70.994761054,42.38382294],[-70.994801945,42.38387186],[-70.99474295,42.383983818],[-70.994878994,42.383987817],[-70.995133954,42.383994353],[-70.995243117,42.383998553],[-70.995368999,42.384006453],[-70.995494444,42.384017625],[-70.995619283,42.384032052],[-70.995788177,42.384056414],[-70.995988717,42.384094647],[-70.996242269,42.38415574],[-70.996360196,42.384189526],[-70.99659093,42.384266185],[-70.99695033,42.384395438],[-70.998441182,42.38493958],[-70.999091762,42.383968839],[-70.996994053,42.383211476],[-70.996755033,42.383140039],[-70.996540287,42.383087729],[-70.996289978,42.383019463],[-70.995788707,42.382928578],[-70.995131114,42.382832725],[-70.994729785,42.382789911],[-70.994787073,42.382839228],[-70.99493597,42.382852306],[-70.995088407,42.38287324],[-70.995131818,42.382907436],[-70.995192287,42.382993524],[-70.995156708,42.383072713],[-70.995166684,42.383190966],[-70.995172474,42.38328653],[-70.995211039,42.383380618],[-70.995273835,42.383448904],[-70.995345525,42.383497797],[-70.995401898,42.383549862],[-70.995482363,42.383593936],[-70.995534368,42.383645981],[-70.995621682,42.383652842],[-70.995693759,42.383653158],[-70.995766987,42.383685478],[-70.995409748,42.383727575],[-70.995228504,42.383689418],[-70.994972342,42.383559103],[-70.994889204,42.383583676],[-70.994805874,42.383632286],[-70.994731045,42.383680933],[-70.994681252,42.383742204]]]],"type":"MultiPolygon"},"name":"Boundary of Belle Isle Marsh Reservation"},"identifier":"urn:lemay:boston:entity:belle-isle-marsh-reservation","inLanguage":"en","isPartOf":{"@id":"https://boston.fyi/#archive"},"license":"https://opendatacommons.org/licenses/pddl/1-0/","name":"Belle Isle Marsh Reservation","provenance":{"@id":"https://boston.fyi/place/belle-isle-marsh-reservation#provenance"},"url":"https://boston.fyi/place/belle-isle-marsh-reservation","version":1},{"@id":"https://boston.fyi/place/belle-isle-marsh-reservation#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/belle-isle-marsh-reservation","name":"Belle Isle Marsh Reservation","position":3}]}]},"json_url":"https://boston.fyi/place/belle-isle-marsh-reservation.json","record":{"alternate_names":[],"canonical_name":"Belle Isle Marsh Reservation","canonical_path":"/place/belle-isle-marsh-reservation","created_at":"2026-09-02T22:38:53.041373Z","description":"Protected open space in the City of Boston open-space inventory. At 1399 Bennington Street.","detail":{"area_sq_m":575074.183212657,"authority":"City of Boston Parks and Recreation Department","boundary_layer":"official","centroid_geojson":{"coordinates":[-70.991638029,42.389199987],"type":"Point"},"detail_type":"Place","geometry_geojson":{"coordinates":[[[[-70.994226629,42.393070299],[-70.994358744,42.393128335],[-70.995160474,42.391876847],[-70.995286891,42.391676395],[-70.99542249,42.391472692],[-70.995567627,42.391272671],[-70.995722143,42.391076589],[-70.995885816,42.390884677],[-70.996058487,42.390697176],[-70.996239908,42.390514307],[-70.996429887,42.390336308],[-70.996562592,42.39022455],[-70.995175984,42.389354666],[-70.995518342,42.389045308],[-70.995960732,42.388667862],[-70.996426846,42.388295795],[-70.997507507,42.388217304],[-70.999338968,42.388083051],[-70.99940619,42.388067577],[-70.999482847,42.388053269],[-70.99955877,42.388036974],[-70.999633897,42.388018731],[-70.99970812,42.387998549],[-70.999781369,42.387976445],[-70.999853515,42.387952461],[-70.99992451,42.387926608],[-70.999994237,42.387898941],[-71.000062633,42.387869476],[-71.000129606,42.387838248],[-71.000195078,42.387805302],[-71.00025896,42.387770684],[-71.000321169,42.387734429],[-71.000381655,42.387696575],[-71.000440314,42.38765718],[-71.000497103,42.387616283],[-71.000551925,42.387573943],[-71.000604725,42.387530202],[-71.000655446,42.387485114],[-71.001051438,42.387084287],[-70.999222526,42.386441574],[-70.999177381,42.386512126],[-70.995309345,42.385118039],[-70.995105573,42.385119055],[-70.995073018,42.3852144],[-70.995094033,42.385338989],[-70.993703417,42.386384214],[-70.991769318,42.38641575],[-70.991528362,42.386780023],[-70.990703196,42.387318077],[-70.989989503,42.387584912],[-70.989242025,42.387568272],[-70.988712372,42.387512442],[-70.988402559,42.387483426],[-70.987948791,42.387264888],[-70.98754742,42.387249777],[-70.986781751,42.387110871],[-70.98675993,42.387584866],[-70.987102746,42.387991795],[-70.987483174,42.388358737],[-70.987808684,42.388834278],[-70.988004609,42.389430331],[-70.987962723,42.389998587],[-70.9876108,42.39071338],[-70.987276728,42.391442565],[-70.98729075,42.391929954],[-70.987471334,42.392201655],[-70.987979962,42.392473915],[-70.989418025,42.392858966],[-70.990439456,42.392904457],[-70.990768361,42.392798149],[-70.991170643,42.392704588],[-70.991865318,42.39255884],[-70.992596183,42.392413248],[-70.992801532,42.392489507],[-70.993030589,42.392495586],[-70.993321234,42.392496866],[-70.993563358,42.392579044],[-70.994017342,42.392679894],[-70.994356204,42.392638294],[-70.994368402,42.392823382],[-70.994251313,42.39292679],[-70.994226629,42.393070299]]],[[[-70.994681252,42.383742204],[-70.994704704,42.383816311],[-70.994761054,42.38382294],[-70.994801945,42.38387186],[-70.99474295,42.383983818],[-70.994878994,42.383987817],[-70.995133954,42.383994353],[-70.995243117,42.383998553],[-70.995368999,42.384006453],[-70.995494444,42.384017625],[-70.995619283,42.384032052],[-70.995788177,42.384056414],[-70.995988717,42.384094647],[-70.996242269,42.38415574],[-70.996360196,42.384189526],[-70.99659093,42.384266185],[-70.99695033,42.384395438],[-70.998441182,42.38493958],[-70.999091762,42.383968839],[-70.996994053,42.383211476],[-70.996755033,42.383140039],[-70.996540287,42.383087729],[-70.996289978,42.383019463],[-70.995788707,42.382928578],[-70.995131114,42.382832725],[-70.994729785,42.382789911],[-70.994787073,42.382839228],[-70.99493597,42.382852306],[-70.995088407,42.38287324],[-70.995131818,42.382907436],[-70.995192287,42.382993524],[-70.995156708,42.383072713],[-70.995166684,42.383190966],[-70.995172474,42.38328653],[-70.995211039,42.383380618],[-70.995273835,42.383448904],[-70.995345525,42.383497797],[-70.995401898,42.383549862],[-70.995482363,42.383593936],[-70.995534368,42.383645981],[-70.995621682,42.383652842],[-70.995693759,42.383653158],[-70.995766987,42.383685478],[-70.995409748,42.383727575],[-70.995228504,42.383689418],[-70.994972342,42.383559103],[-70.994889204,42.383583676],[-70.994805874,42.383632286],[-70.994731045,42.383680933],[-70.994681252,42.383742204]]]],"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":"1399 Bennington Street","boston_dataset":"open-space","latitude":42.389332938024424,"longitude":-70.99448292918291},"id":"d0d48aa5-8648-4f78-a644-ef50ea833f25","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":"62","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":"2026-09-02T22:38:53.161937Z","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":"2026-09-02T22:38:53.200872Z","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":"2026-09-02T22:38:53.243195Z","seq":3,"tool":"archive-ingest 0.1.0"}]},"record_kind":"entity","slug":"belle-isle-marsh-reservation","status":"published","summary":"Protected open space in the City of Boston open-space inventory. At 1399 Bennington Street.","title":"Belle Isle Marsh Reservation","updated_at":"2026-09-02T22:38:53.041373Z","urn":"urn:lemay:boston:entity:belle-isle-marsh-reservation","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:belle-isle-marsh-reservation","version_history":[{"change_note":"accessioned from the City of Boston `open-space` file","changed_by":"archive-ingest 0.1.0","recorded_at":"2026-09-02T22:38:53.285359Z","version":1}]}