# Castle Island

Castle Island is an island in [Lake Superior](https://ontology.bommaritollc.com/id/01a0ddfe-d154-7649-b19b-081f619c450a), [Michigan](https://ontology.bommaritollc.com/id/01a0ca47-57ff-7219-9e2f-cdc1b39bd0fa), in the [Nodaway Point-Frontal Lake Superior (HUC10 0418000001)](https://ontology.bommaritollc.com/id/01a0de92-1f26-72d2-95cf-36dfd969113e) watershed.

IRI: <https://ontology.bommaritollc.com/id/01a0ddfe-aed9-751c-aa20-824a9141f364>

Within: [Michigan](https://ontology.bommaritollc.com/id/01a0ca47-57ff-7219-9e2f-cdc1b39bd0fa) › [Lake Superior](https://ontology.bommaritollc.com/id/01a0ddfe-d154-7649-b19b-081f619c450a)

Type: [geo:Feature](http://www.opengis.net/ont/geosparql#Feature), [schema:Landform](https://schema.org/Landform), [schema:Place](https://schema.org/Place)

Location: 47.92239, -88.82036 (box -88.82036, 47.92239, -88.82036, 47.92239; west, south, east, north)

- `adms:identifier`: [gnis 622865](https://ontology.bommaritollc.com/id/01a0ddfe-aeda-7093-a838-13ec303c143d)
- `dcterms:type`: [island](https://ontology.bommaritollc.com/vocab/geo/gnisIsland)
- `geo:hasDefaultGeometry`: [point of Castle Island](https://ontology.bommaritollc.com/id/01a0ddfe-e44f-7082-8b81-5e2b96164518)
- `geo:hasGeometry`: [point of Castle Island](https://ontology.bommaritollc.com/id/01a0ddfe-e44f-7082-8b81-5e2b96164518)
- **in watershed** (`bcgeo:inWatershed`): [Nodaway Point-Frontal Lake Superior (HUC10 0418000001)](https://ontology.bommaritollc.com/id/01a0de92-1f26-72d2-95cf-36dfd969113e)
- `prov:wasDerivedFrom`:
  - [evidence from https://prd-tnm.s3.amazonaws.com/StagedProducts/GeographicNames/DomesticNames/DomesticNames\_MI\_Text.zip](https://ontology.bommaritollc.com/id/01a0ddfe-aed9-751c-aa20-824909b337e0)
  - [evidence from https://3dhp.nationalmap.gov/arcgis/rest/services/usgs\_3dhp\_all/FeatureServer](https://ontology.bommaritollc.com/id/01a0de32-481d-70ff-959c-2c2129341066)
  - [evidence from https://3dhp.nationalmap.gov/arcgis/rest/services/usgs\_3dhp\_all/FeatureServer](https://ontology.bommaritollc.com/id/01a0de86-db30-7254-9f63-ca0f7128f8dc)
  - [evidence from https://hydro.nationalmap.gov/arcgis/rest/services/wbd/MapServer](https://ontology.bommaritollc.com/id/01a0de92-1923-71fb-aada-d53e5a05907d)
- `schema:containedInPlace`:
  - [Keweenaw County](https://ontology.bommaritollc.com/id/01a0ca47-5d2f-7501-b2ba-1fe0d1e4fc6a)
  - [Eagle Harbor Township](https://ontology.bommaritollc.com/id/01a0ca47-6e5a-71b6-9848-23ba888081e4)
  - [Lake Superior](https://ontology.bommaritollc.com/id/01a0ddfe-d154-7649-b19b-081f619c450a)
- `skos:prefLabel`: Castle Island

## Elsewhere

- [Wikidata Q34696609](https://www.wikidata.org/wiki/Q34696609) (proposed match (exactMatch))
- [USGS GNIS 622865](https://edits.nationalmap.gov/apps/gaz-domestic/public/summary/622865) (gnis)
- [OpenStreetMap](https://www.openstreetmap.org/?mlat=47.92239&mlon=-88.82036#map=14/47.92239/-88.82036) (47.92239, -88.82036)
- [Google Maps](https://www.google.com/maps/search/?api=1&query=47.92239,-88.82036)
- [Source](https://prd-tnm.s3.amazonaws.com/StagedProducts/GeographicNames/DomesticNames/DomesticNames_MI_Text.zip) (prd-tnm.s3.amazonaws.com)
- [Source](https://3dhp.nationalmap.gov/arcgis/rest/services/usgs_3dhp_all/FeatureServer) (3dhp.nationalmap.gov)
- [Source](https://hydro.nationalmap.gov/arcgis/rest/services/wbd/MapServer) (hydro.nationalmap.gov)

## Pointing here

- Mappings (1; `owl:annotatedSource`):
  - [exactMatch http://www.wikidata.org/entity/Q34696609 (proposed)](https://ontology.bommaritollc.com/id/01a0ddff-73a9-7070-a01b-a3b6678df7dd)

---
Also as: [Turtle](https://ontology.bommaritollc.com/id/01a0ddfe-aed9-751c-aa20-824a9141f364.ttl), [JSON-LD](https://ontology.bommaritollc.com/id/01a0ddfe-aed9-751c-aa20-824a9141f364.jsonld), [N-Triples](https://ontology.bommaritollc.com/id/01a0ddfe-aed9-751c-aa20-824a9141f364.nt), [HTML](https://ontology.bommaritollc.com/id/01a0ddfe-aed9-751c-aa20-824a9141f364)
Cite as: Castle Island. bc-ontology, release 0.1.0-rc12, 2026-09-27. https://ontology.bommaritollc.com/id/01a0ddfe-aed9-751c-aa20-824a9141f364
Release 0.1.0-rc12, graph hash a20f66b983549f220c6f061b7e40233771a06aa47a0c0aede95a2a57ee2e9553.