# Lake Trillium

Lake Trillium is a lake in [Grant Township](https://ontology.bommaritollc.com/id/01a0ca47-70b6-7620-8fe0-e460baaefc02), [Keweenaw County](https://ontology.bommaritollc.com/id/01a0ca47-5d2f-7501-b2ba-1fe0d1e4fc6a), [Michigan](https://ontology.bommaritollc.com/id/01a0ca47-57ff-7219-9e2f-cdc1b39bd0fa) (2.4 ha), in the [Montreal River-Frontal Lake Superior (HUC10 0402010305)](https://ontology.bommaritollc.com/id/01a0de92-1c3c-7128-b86f-05eb41187e92) watershed.

IRI: <https://ontology.bommaritollc.com/id/01a0ddfe-bd80-74a5-a5a8-ccae93cf5785>

Within: [Michigan](https://ontology.bommaritollc.com/id/01a0ca47-57ff-7219-9e2f-cdc1b39bd0fa) › [Keweenaw County](https://ontology.bommaritollc.com/id/01a0ca47-5d2f-7501-b2ba-1fe0d1e4fc6a) › [Grant Township](https://ontology.bommaritollc.com/id/01a0ca47-70b6-7620-8fe0-e460baaefc02)

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

Location: 47.42938, -87.81880 (box -87.81968, 47.42829, -87.81767, 47.43084; west, south, east, north)

- `adms:identifier`: [gnis 631109](https://ontology.bommaritollc.com/id/01a0ddfe-bd81-775c-94e7-7f2b770659ee)
- `dcterms:type`: [lake](https://ontology.bommaritollc.com/vocab/geo/gnisLake)
- `geo:hasDefaultGeometry`: [shape of Lake Trillium](https://ontology.bommaritollc.com/id/01a0de2c-cef6-77e0-ac87-18f4d8989dd8)
- `geo:hasGeometry`:
  - [point of Lake Trillium](https://ontology.bommaritollc.com/id/01a0ddfe-f516-7285-b40a-be82b86c492c)
  - [shape of Lake Trillium](https://ontology.bommaritollc.com/id/01a0de2c-cef6-77e0-ac87-18f4d8989dd8)
- `geo:hasMetricArea`: 23833.1 (xsd:double)
- **in watershed** (`bcgeo:inWatershed`): [Montreal River-Frontal Lake Superior (HUC10 0402010305)](https://ontology.bommaritollc.com/id/01a0de92-1c3c-7128-b86f-05eb41187e92)
- `prov:wasDerivedFrom`:
  - [evidence from https://prd-tnm.s3.amazonaws.com/StagedProducts/GeographicNames/DomesticNames/DomesticNames\_MI\_Text.zip](https://ontology.bommaritollc.com/id/01a0ddfe-bd80-74a5-a5a8-ccad4905ba2a)
  - [evidence from https://3dhp.nationalmap.gov/arcgis/rest/services/usgs\_3dhp\_all/FeatureServer](https://ontology.bommaritollc.com/id/01a0de32-5360-7616-ab90-faff3a71a769)
  - [evidence from https://hydro.nationalmap.gov/arcgis/rest/services/wbd/MapServer](https://ontology.bommaritollc.com/id/01a0de92-1586-7039-90cd-868a60007357)
- `schema:containedInPlace`:
  - [Keweenaw County](https://ontology.bommaritollc.com/id/01a0ca47-5d2f-7501-b2ba-1fe0d1e4fc6a)
  - [Grant Township](https://ontology.bommaritollc.com/id/01a0ca47-70b6-7620-8fe0-e460baaefc02)
- `skos:altLabel`: Lost Lake
- `skos:prefLabel`: Lake Trillium

## Elsewhere

- [Wikidata Q88274083](https://www.wikidata.org/wiki/Q88274083) (proposed match (exactMatch))
- [USGS GNIS 631109](https://edits.nationalmap.gov/apps/gaz-domestic/public/summary/631109) (gnis)
- [OpenStreetMap](https://www.openstreetmap.org/?mlat=47.42938&mlon=-87.81880#map=14/47.42938/-87.81880) (47.42938, -87.81880)
- [Google Maps](https://www.google.com/maps/search/?api=1&query=47.42938,-87.81880)
- [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/Q88274083 (proposed)](https://ontology.bommaritollc.com/id/01a0ddff-75f2-74df-8e8f-e831084abfb7)

---
Also as: [Turtle](https://ontology.bommaritollc.com/id/01a0ddfe-bd80-74a5-a5a8-ccae93cf5785.ttl), [JSON-LD](https://ontology.bommaritollc.com/id/01a0ddfe-bd80-74a5-a5a8-ccae93cf5785.jsonld), [N-Triples](https://ontology.bommaritollc.com/id/01a0ddfe-bd80-74a5-a5a8-ccae93cf5785.nt), [HTML](https://ontology.bommaritollc.com/id/01a0ddfe-bd80-74a5-a5a8-ccae93cf5785)
Cite as: Lake Trillium. bc-ontology, release 0.1.0-rc15, 2026-09-28. https://ontology.bommaritollc.com/id/01a0ddfe-bd80-74a5-a5a8-ccae93cf5785
Release 0.1.0-rc15, graph hash 90961d0d6b29954f5f0257ebc2d1d12c6ce580def6a2f45cbf04d248aa879e72.