Jamaica Plain

The Boston Archive

neighborhood · official boundary

Jamaica Plain

An official neighborhood of Boston, as bounded by the Boston Planning Department — 2519 acres. This is the official layer: the boundary an authority drew. What people call this place, and where they say it reaches, are filed separately as attested claims.

The official boundary of Jamaica Plain as promulgated by the Boston Planning Department.

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: neighborhood
Authority: Boston Planning Department
Within: Boston
Area: 10.20 square kilometers
Boundary: held as GeoJSON at /asset/e68577b8ab49d8c81e8509745ae41b64/jamaica-plain.geojson — 33079 bytes, exactly as accessioned

Map

A map of the boundary of Jamaica Plain, a neighborhood in the record of Boston, Massachusetts, within Boston. The outline is an official boundary, promulgated by Boston Planning Department. It encloses approximately 10.20 square kilometers. Faint surrounding lines show the outline of the City of Boston, drawn as the union of its twenty-six official neighborhood boundaries. — Rendered by the archive, served as `image/svg+xml` at `/asset/c704b871c977c67c5df081db5567eacf/jamaica-plain.svg` — 3024 bytes, SHA-256 `c704b871c977c67c`… · Open Data Commons Public Domain Dedication and Licence (PDDL) 1.0
The exact coordinates are held separately as `/asset/e68577b8ab49d8c81e8509745ae41b64/jamaica-plain.geojson` (`application/geo+json`, 33079 bytes, SHA-256 `e68577b8ab49d8c8`…). 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 Jamaica Plain, and what kind of boundary does the archive hold?

Jamaica Plain is recorded as a neighborhood, within Boston. The archive holds its boundary on the official layer: promulgated by an authority with the power to draw it.

Attested by: Boston Planning Department neighborhood boundaries, retrieved 2 September 2026, under Open Data Commons Public Domain Dedication and Licence (PDDL) 1.0.

Who drew the boundary of Jamaica Plain?

Boston Planning 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: Boston Planning Department neighborhood boundaries, retrieved 2 September 2026, under Open Data Commons Public Domain Dedication and Licence (PDDL) 1.0.

How large is Jamaica Plain?

10.20 square kilometers, computed from the boundary the archive holds and not quoted from elsewhere.

Attested by: Boston Planning Department neighborhood boundaries, retrieved 2 September 2026, under Open Data Commons Public Domain Dedication and Licence (PDDL) 1.0.

What does the archive's map of Jamaica Plain 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/c704b871c977c67c5df081db5567eacf/jamaica-plain.svg. The exact coordinates it was drawn from are served separately as application/geo+json at /asset/e68577b8ab49d8c81e8509745ae41b64/jamaica-plain.geojson.

Attested by: Rendered by archive-ingest 0.1.0 from the boundary this archive holds; digest c704b871c977c67c5df081db5567eacf74016dbef1c7c5f2f55d60d763224815.

What else does the world call Jamaica Plain?

The archive reconciles this record to Wikidata (Q985993); English Wikipedia (Jamaica_Plain). 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: Q985993 — Q985993 — label "Jamaica Plain", classed as gay village, neighborhood in Boston, decided 3 September 2026 by archive-ingest 0.1.0. Jamaica_Plain — schema:about Q985993 ; schema:isPartOf en.wikipedia, decided 3 September 2026 by archive-ingest 0.1.0

What does the archive hold for Jamaica Plain, and under what license?

The Boston Archive holds this record of Jamaica Plain from Boston Planning Department neighborhood boundaries, 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 Boston Planning Department.

Attested by: Boston Planning Department neighborhood boundaries, 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 — Q985993Method: label-type-geography (point inside the boundary) · Matched against: Q985993 — label "Jamaica Plain", classed as gay village, neighborhood in Boston · Decided 3 September 2026Note: 2 records of this archive answer to this identifier. It is asserted here, on the archive's principal record for the place — the one holding a boundary rather than a point — and held on the others, which are tied to this record by an internal same_as relation. An identifier asserted twice is a merge instruction to a consumer.
English Wikipedia — Jamaica_PlainMethod: wikidata-sitelink · Matched against: schema:about Q985993 ; schema:isPartOf en.wikipedia · Decided 3 September 2026Note: 2 records of this archive answer to this identifier. It is asserted here, on the archive's principal record for the place — the one holding a boundary rather than a point — and held on the others, which are tied to this record by an internal same_as relation. An identifier asserted twice is a merge instruction to a consumer.

Related records

located in — Boston

Identity

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

Provenance

Source: Boston Planning Department neighborhood boundaries — source of record
License: Open Data Commons Public Domain Dedication and Licence (PDDL) 1.0 (public_domain)
Retrieved: 2 September 2026
Source identifier: 11
Attribution: Boston Planning Department
Rights as stated: Open Data Commons Public Domain Dedication and License (PDDL)

Transform ladder

#	Operation	Description	Tool
1	`fetch`	retrieved the official neighborhood boundaries as GeoJSON from the City of Boston open-data portal	`archive-ingest 0.1.0`
2	`reproject`	the source is already WGS 84 (EPSG:4326); the geometry was set to that SRID and multi-cast without alteration of coordinates	`archive-ingest 0.1.0`
3	`normalize`	the feature's name became the record title; the boundary was written to the official layer with the promulgating authority named	`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/e68577b8ab49d8c81e8509745ae41b64/jamaica-plain.geojson and a static map rendered server-side at /asset/c704b871c977c67c5df081db5567eacf/jamaica-plain.svg. The stored geometry is unchanged; the record graph now addresses it instead of carrying it.	`archive-ingest 0.1.0`