Back Bay Fens

The Boston Archive

park · official boundary

Back Bay Fens

Protected open space in the City of Boston open-space inventory. At 100 Park Drive (Clemente Field House) 125 The Fenway (Emerald Necklace Conservancy) 50 Park Drive (Duck House) 1 Evans Way (Evans Way) Forsyth Way (Roadway) 70 Park Drive (Rose Garden) 35 The Fenway (Mother's Rest) 20 Park Drive…

Place

official layer

An official boundary, promulgated by an authority with the power to draw it. It is not amended by anything on the vernacular layer.

Filed by this archive as: park
Authority: City of Boston Parks and Recreation Department
Within: Boston
Area: 25.57 hectares
Boundary: held as GeoJSON at /asset/0f3a86a2328363ff3685ab2c997fb6a0/back-bay-fens-2.geojson — 20649 bytes, exactly as accessioned

Map

A map of the boundary of Back Bay Fens, a park in the record of Boston, Massachusetts, within Boston. The outline is an official boundary, promulgated by City of Boston Parks and Recreation Department. It encloses approximately 25.57 hectares. — Rendered by the archive, served as `image/svg+xml` at `/asset/1abd0482dbc84d799ec6a821a1e96e16/back-bay-fens-2.svg` — 3801 bytes, SHA-256 `1abd0482dbc84d79`… · Open Data Commons Public Domain Dedication and Licence (PDDL) 1.0
The exact coordinates are held separately as `/asset/0f3a86a2328363ff3685ab2c997fb6a0/back-bay-fens-2.geojson` (`application/geo+json`, 20649 bytes, SHA-256 `0f3a86a2328363ff`…). The map is simplified for drawing; the boundary is not.

Questions this record answers

Each answer is composed only from fields this record carries, and names the attestation for what it says. A question the record cannot answer from its own attested content is not asked here. Where a boundary is described as official it was promulgated by an authority with the power to draw it and is not amended by anything on the vernacular layer; where it is described as vernacular it is held by attestation alone and amends no official boundary.

Where is Back Bay Fens, and what kind of boundary does the archive hold?

Back Bay Fens is recorded as a park, within Boston. The archive holds its boundary on the official layer: promulgated by an authority with the power to draw it.

Attested by: City of Boston Open Data Portal (Analyze Boston), retrieved 2 September 2026, under Open Data Commons Public Domain Dedication and Licence (PDDL) 1.0.

Who drew the boundary of Back Bay Fens?

City of Boston Parks and Recreation Department promulgated it. A boundary with no promulgating authority is an assertion rather than a fact, and this archive files those separately, as claims.

Attested by: City of Boston Open Data Portal (Analyze Boston), retrieved 2 September 2026, under Open Data Commons Public Domain Dedication and Licence (PDDL) 1.0.

How large is Back Bay Fens?

25.57 hectares, computed from the boundary the archive holds and not quoted from elsewhere.

Attested by: City of Boston Open Data Portal (Analyze Boston), retrieved 2 September 2026, under Open Data Commons Public Domain Dedication and Licence (PDDL) 1.0.

What does the archive's map of Back Bay Fens show?

A static map of the boundary, rendered by the archive on a server and never in a reader's browser, served as image/svg+xml at /asset/1abd0482dbc84d799ec6a821a1e96e16/back-bay-fens-2.svg. The exact coordinates it was drawn from are served separately as application/geo+json at /asset/0f3a86a2328363ff3685ab2c997fb6a0/back-bay-fens-2.geojson.

Attested by: Rendered by archive-ingest 0.1.0 from the boundary this archive holds; digest 1abd0482dbc84d799ec6a821a1e96e162a1427324dcb4bab18a2c8503be8de35.

What else does the world call Back Bay Fens?

The archive reconciles this record to Wikidata (Q798303); English Wikipedia (Back_Bay_Fens). Each identity carries the method that produced it, and any candidate the archive did not assert is published in the reconciliation ledger rather than left absent.

Attested by: Q798303 — Q798303 — label "Back Bay Fens", classed as park, decided 3 September 2026 by archive-ingest 0.1.0. Back_Bay_Fens — schema:about Q798303 ; schema:isPartOf en.wikipedia, decided 3 September 2026 by archive-ingest 0.1.0

What does the archive hold for Back Bay Fens, and under what license?

The Boston Archive holds this record of Back Bay Fens from City of Boston Open Data Portal (Analyze Boston), retrieved 2 September 2026, under Open Data Commons Public Domain Dedication and Licence (PDDL) 1.0 (public domain). 4 recorded transforms stand between the retrieved bytes and this record. Attribution is due to City of Boston.

Attested by: City of Boston Open Data Portal (Analyze Boston), retrieved 2 September 2026, under Open Data Commons Public Domain Dedication and Licence (PDDL) 1.0.

This record, elsewhere

Identities the archive asserts, each named with the method that produced it. Candidates the archive did not assert here are held in the reconciliation ledger and are shown below, under candidates the archive declined, and in the reconciliation ledger. Each method is stated in full — the procedure, the value it was compared against, and the date it was decided — in this record's machine rendering.

Wikidata — Q798303Method: label-type-geography (point inside the boundary) · Matched against: Q798303 — label "Back Bay Fens", classed as park · Decided 3 September 2026
English Wikipedia — Back_Bay_FensMethod: wikidata-sitelink · Matched against: schema:about Q798303 ; schema:isPartOf en.wikipedia · Decided 3 September 2026

Related records

located in — Boston

Identity

Identifier: urn:lemay:boston:entity:back-bay-fens-2
Canonical URL: https://boston.fyi/place/back-bay-fens-2
As JSON: https://boston.fyi/place/back-bay-fens-2.json
Version: 1 · last changed 2 September 2026

Provenance

Source: City of Boston Open Data Portal (Analyze Boston) — source of record
License: Open Data Commons Public Domain Dedication and Licence (PDDL) 1.0 (public_domain)
Retrieved: 2 September 2026
Source identifier: 561
Attribution: City of Boston
Rights as stated: Open Data Commons Public Domain Dedication and License (PDDL)

Transform ladder

#	Operation	Description	Tool
1	`fetch`	retrieved the dataset's GeoJSON from the City of Boston open-data portal	`archive-ingest 0.1.0`
2	`normalize`	the source's own name field became the record title; no name was supplied by the archive	`archive-ingest 0.1.0`
3	`reproject`	the source is WGS 84 (EPSG:4326); geometry was set to that SRID without alteration of coordinates	`archive-ingest 0.1.0`
4	`externalize-boundary`	The boundary left the inline page graph and became two preserved holdings: the exact coordinates at /asset/0f3a86a2328363ff3685ab2c997fb6a0/back-bay-fens-2.geojson and a static map rendered server-side at /asset/1abd0482dbc84d799ec6a821a1e96e16/back-bay-fens-2.svg. The stored geometry is unchanged; the record graph now addresses it instead of carrying it.	`archive-ingest 0.1.0`