# Grass Island

Grass Island is an island in [Lake Saint Clair](https://ontology.bommaritollc.com/id/01a0ddfe-dc06-74b6-8a7c-a3833210a9e5), [Michigan](https://ontology.bommaritollc.com/id/01a0ca47-57ff-7219-9e2f-cdc1b39bd0fa), in the [Lake St. Clair (HUC10 0409000210)](https://ontology.bommaritollc.com/id/01a0de92-1ed3-719b-ba19-67738ce6adef) watershed.

IRI: <https://ontology.bommaritollc.com/id/01a0ddfe-b633-752d-922d-1dcaead8ff48>

Within: [Michigan](https://ontology.bommaritollc.com/id/01a0ca47-57ff-7219-9e2f-cdc1b39bd0fa) › [Lake Saint Clair](https://ontology.bommaritollc.com/id/01a0ddfe-dc06-74b6-8a7c-a3833210a9e5)

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

Location: 42.59781, -82.78158 (box -82.78158, 42.59781, -82.78158, 42.59781; west, south, east, north)

- `adms:identifier`: [gnis 627173](https://ontology.bommaritollc.com/id/01a0ddfe-b634-713c-b8ca-6aa159064c42)
- `dcterms:type`: [island](https://ontology.bommaritollc.com/vocab/geo/gnisIsland)
- `geo:hasDefaultGeometry`: [point of Grass Island](https://ontology.bommaritollc.com/id/01a0ddfe-ead4-76c0-91fb-e049c62890a5)
- `geo:hasGeometry`: [point of Grass Island](https://ontology.bommaritollc.com/id/01a0ddfe-ead4-76c0-91fb-e049c62890a5)
- **in watershed** (`bcgeo:inWatershed`): [Lake St. Clair (HUC10 0409000210)](https://ontology.bommaritollc.com/id/01a0de92-1ed3-719b-ba19-67738ce6adef)
- `prov:wasDerivedFrom`:
  - [evidence from https://prd-tnm.s3.amazonaws.com/StagedProducts/GeographicNames/DomesticNames/DomesticNames\_MI\_Text.zip](https://ontology.bommaritollc.com/id/01a0ddfe-b633-752d-922d-1dc9ae029764)
  - [evidence from https://3dhp.nationalmap.gov/arcgis/rest/services/usgs\_3dhp\_all/FeatureServer](https://ontology.bommaritollc.com/id/01a0de32-4dcf-7586-b206-61b4060b97f1)
  - [evidence from https://3dhp.nationalmap.gov/arcgis/rest/services/usgs\_3dhp\_all/FeatureServer](https://ontology.bommaritollc.com/id/01a0de86-db60-7076-9a39-7537e0f02ec3)
  - [evidence from https://hydro.nationalmap.gov/arcgis/rest/services/wbd/MapServer](https://ontology.bommaritollc.com/id/01a0de92-18b0-70c6-9fac-de35c3a12539)
- `schema:containedInPlace`:
  - [Macomb County](https://ontology.bommaritollc.com/id/01a0ca47-5a13-7757-80a2-202aea23905c)
  - [Harrison Township](https://ontology.bommaritollc.com/id/01a0ca47-693f-72e3-8394-51c68cc3c3b5)
  - [Lake Saint Clair](https://ontology.bommaritollc.com/id/01a0ddfe-dc06-74b6-8a7c-a3833210a9e5)
- `skos:altLabel`: Gross Island
- `skos:prefLabel`: Grass Island

## Elsewhere

- [Wikidata Q49639512](https://www.wikidata.org/wiki/Q49639512) (proposed match (exactMatch))
- [USGS GNIS 627173](https://edits.nationalmap.gov/apps/gaz-domestic/public/summary/627173) (gnis)
- [OpenStreetMap](https://www.openstreetmap.org/?mlat=42.59781&mlon=-82.78158#map=14/42.59781/-82.78158) (42.59781, -82.78158)
- [Google Maps](https://www.google.com/maps/search/?api=1&query=42.59781,-82.78158)
- [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/Q49639512 (proposed)](https://ontology.bommaritollc.com/id/01a0ddff-74a7-778c-804a-1ba6fff7840a)

---
Also as: [Turtle](https://ontology.bommaritollc.com/id/01a0ddfe-b633-752d-922d-1dcaead8ff48.ttl), [JSON-LD](https://ontology.bommaritollc.com/id/01a0ddfe-b633-752d-922d-1dcaead8ff48.jsonld), [N-Triples](https://ontology.bommaritollc.com/id/01a0ddfe-b633-752d-922d-1dcaead8ff48.nt), [HTML](https://ontology.bommaritollc.com/id/01a0ddfe-b633-752d-922d-1dcaead8ff48)
Cite as: Grass Island. bc-ontology, release 0.1.0-rc12, 2026-09-27. https://ontology.bommaritollc.com/id/01a0ddfe-b633-752d-922d-1dcaead8ff48
Release 0.1.0-rc12, graph hash a20f66b983549f220c6f061b7e40233771a06aa47a0c0aede95a2a57ee2e9553.