landmark · official boundary
Ayer Mansion (interior)
A property designated a landmark by the Boston Landmarks Commission. At Interior only.
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
- landmark
- Authority
- Boston Landmarks Commission
- Within
- Boston
- Area
- 458 square meters
- Boundary
- held as GeoJSON at
/asset/e9fa658ad83c5f3f5e577896467f85d1/ayer-mansion-interior.geojson— 754 bytes, exactly as accessioned
Map
image/svg+xml at /asset/f2c81e13dd5d210a1f1e9f3eac910612/ayer-mansion-interior.svg — 1395 bytes, SHA-256 f2c81e13dd5d210a… · Open Data Commons Public Domain Dedication and Licence (PDDL) 1.0The exact coordinates are held separately as
/asset/e9fa658ad83c5f3f5e577896467f85d1/ayer-mansion-interior.geojson (application/geo+json, 754 bytes, SHA-256 e9fa658ad83c5f3f…). 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 Ayer Mansion (interior), and what kind of boundary does the archive hold?
Ayer Mansion (interior) is recorded as a landmark, 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 Ayer Mansion (interior)?
Boston Landmarks Commission 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 Ayer Mansion (interior)?
458 square meters, 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 Ayer Mansion (interior) 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/f2c81e13dd5d210a1f1e9f3eac910612/ayer-mansion-interior.svg. The exact coordinates it was drawn from are served separately as application/geo+json at /asset/e9fa658ad83c5f3f5e577896467f85d1/ayer-mansion-interior.geojson.
Attested by: Rendered by archive-ingest 0.1.0 from the boundary this archive holds; digest f2c81e13dd5d210a1f1e9f3eac9106126e217b473a5f36ae0b1f03281ff5be63.
What does the archive hold for Ayer Mansion (interior), and under what license?
The Boston Archive holds this record of Ayer Mansion (interior) 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.
Related records
- located in — Boston
Identity
- Identifier
- urn:lemay:boston:entity:ayer-mansion-interior
- Canonical URL
- https://boston.fyi/place/ayer-mansion-interior
- As JSON
- https://boston.fyi/place/ayer-mansion-interior.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
- 4
- 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/e9fa658ad83c5f3f5e577896467f85d1/ayer-mansion-interior.geojson and a static map rendered server-side at /asset/f2c81e13dd5d210a1f1e9f3eac910612/ayer-mansion-interior.svg. The stored geometry is unchanged; the record graph now addresses it instead of carrying it. | archive-ingest 0.1.0 |