Dataset
21inch Sea Level Rise High Tide
Area of potential coastal and riverine flooding in Boston under various sea level rise scenarios (9-inch in 2030s, 21-inch in 2050s, and 36-inch in 2070s) at high tide and in the event of storms with an annual exceedance probability (AEP) of 10 and 1 percent. Learn…
Dataset
- Publisher
- Boston Maps
- Spatial coverage
- Boston, Massachusetts
- Keywords
- climate ready boston, flooding, sea level rise
- Publisher's page
- https://data.boston.gov/dataset/21inch-sea-level-rise-high-tide
Artifacts
“Preserved” means the archive holds the bytes and their digest. “Referenced” means it holds the record of them and nothing more. The archive does not claim a holding it cannot prove.
| Format | Preservation | Size | Digest | Source |
|---|---|---|---|---|
| ArcGIS GeoServices REST API | referenced | — | — | source |
| CSV | preserved | 185 | 34ea25f8e359a56f7589dad08a90efd5c3e396f3a11f4cd89e40da441f0571db | source |
| GeoJSON | preserved | 6240511 | 8bcdc3b61827d6beff0691e8e2e27756cec9bcbe108b30ed6d0b79e78165f61e | source |
| HTML | referenced | — | — | source |
| HTML | referenced | — | — | source |
| KML | preserved | 2561817 | 91cc01044ae06807f67568fab35823294aae660fe730ea8e7567e9568c071b5a | source |
| ZIP | referenced | — | — | source |
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.
Who publishes 21inch Sea Level Rise High Tide, and under what license?
Boston Maps publishes it. The archive accessioned it under Open Data Commons Public Domain Dedication and Licence (PDDL) 1.0 (public domain), and holds the publisher's own column dictionary verbatim rather than reworded into the archive's vocabulary — how a publisher names a column is evidence about the publisher.
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 21inch Sea Level Rise High Tide cover?
In space, Boston, Massachusetts.
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.
Can the archive hand back the bytes of 21inch Sea Level Rise High Tide?
Yes, for 3 of 7 distributions. Each preserved artifact is served at its own address with the digest recorded at retrieval emitted in an x-archive-sha256 header, and is handed over as an attachment: preserved material is evidence, not content, and is never rendered on this origin.
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 hold for 21inch Sea Level Rise High Tide, and under what license?
The Boston Archive holds this record of 21inch Sea Level Rise High Tide 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). 2 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.
Identity
- Identifier
- urn:lemay:boston:dataset:21inch-sea-level-rise-high-tide
- Canonical URL
- https://boston.fyi/dataset/21inch-sea-level-rise-high-tide
- As JSON
- https://boston.fyi/dataset/21inch-sea-level-rise-high-tide.json
- Version
- 2 · last changed 13 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
- 21inch-sea-level-rise-high-tide
- 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 metadata record from the CKAN package_show endpoint | archive-ingest 0.1.0 |
| 2 | normalize | mapped the portal's catalog fields onto the archive's Dataset record; the publisher's own wording and column dictionary are preserved verbatim | archive-ingest 0.1.0 |