# Duncan Lake

Duncan Lake is a lake in [Thornapple Township](https://ontology.bommaritollc.com/id/01a0ca47-7b28-7041-bb90-e40f4ab1e319), [Barry County](https://ontology.bommaritollc.com/id/01a0ca47-5a13-7757-80a2-201e49e8447d), [Michigan](https://ontology.bommaritollc.com/id/01a0ca47-57ff-7219-9e2f-cdc1b39bd0fa) (52.5 ha), in the [Lower Thornapple River (HUC10 0405000704)](https://ontology.bommaritollc.com/id/01a0de92-1d9f-70f8-8517-16f5873582d8) watershed.

IRI: <https://ontology.bommaritollc.com/id/01a0ddfe-b307-75a4-8dde-fb3f994a069d>

Within: [Michigan](https://ontology.bommaritollc.com/id/01a0ca47-57ff-7219-9e2f-cdc1b39bd0fa) › [Barry County](https://ontology.bommaritollc.com/id/01a0ca47-5a13-7757-80a2-201e49e8447d) › [Thornapple Township](https://ontology.bommaritollc.com/id/01a0ca47-7b28-7041-bb90-e40f4ab1e319)

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

Location: 42.75413, -85.53255 (box -85.53866, 42.74274, -85.52424, 42.76611; west, south, east, north)

- `adms:identifier`: [gnis 624987](https://ontology.bommaritollc.com/id/01a0ddfe-b307-75a4-8dde-fb47862f8d87)
- `dcterms:type`: [lake](https://ontology.bommaritollc.com/vocab/geo/gnisLake)
- `geo:hasDefaultGeometry`: [shape of Duncan Lake](https://ontology.bommaritollc.com/id/01a0de2c-c8e0-7732-875c-cd7ec2e777fe)
- `geo:hasGeometry`:
  - [point of Duncan Lake](https://ontology.bommaritollc.com/id/01a0ddfe-e78c-773b-9eca-923171fe185c)
  - [shape of Duncan Lake](https://ontology.bommaritollc.com/id/01a0de2c-c8e0-7732-875c-cd7ec2e777fe)
- `geo:hasMetricArea`: 525398.8 (xsd:double)
- **in watershed** (`bcgeo:inWatershed`): [Lower Thornapple River (HUC10 0405000704)](https://ontology.bommaritollc.com/id/01a0de92-1d9f-70f8-8517-16f5873582d8)
- `prov:wasDerivedFrom`:
  - [evidence from https://prd-tnm.s3.amazonaws.com/StagedProducts/GeographicNames/DomesticNames/DomesticNames\_MI\_Text.zip](https://ontology.bommaritollc.com/id/01a0ddfe-b307-75a4-8dde-fb3ebef5d88c)
  - [evidence from https://3dhp.nationalmap.gov/arcgis/rest/services/usgs\_3dhp\_all/FeatureServer](https://ontology.bommaritollc.com/id/01a0de32-4b17-7549-b01d-cf57a7aad2b3)
  - [evidence from https://hydro.nationalmap.gov/arcgis/rest/services/wbd/MapServer](https://ontology.bommaritollc.com/id/01a0de92-173e-7365-9b6a-3a410a98ebd7)
- `schema:containedInPlace`:
  - [Barry County](https://ontology.bommaritollc.com/id/01a0ca47-5a13-7757-80a2-201e49e8447d)
  - [Thornapple Township](https://ontology.bommaritollc.com/id/01a0ca47-7b28-7041-bb90-e40f4ab1e319)
- `skos:prefLabel`: Duncan Lake

## Elsewhere

- [Wikidata Q33248184](https://www.wikidata.org/wiki/Q33248184) (proposed match (exactMatch))
- [USGS GNIS 624987](https://edits.nationalmap.gov/apps/gaz-domestic/public/summary/624987) (gnis)
- [OpenStreetMap](https://www.openstreetmap.org/?mlat=42.75413&mlon=-85.53255#map=14/42.75413/-85.53255) (42.75413, -85.53255)
- [Google Maps](https://www.google.com/maps/search/?api=1&query=42.75413,-85.53255)
- [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/Q33248184 (proposed)](https://ontology.bommaritollc.com/id/01a0ddff-746b-701c-a28d-79ce21f2a197)

---
Also as: [Turtle](https://ontology.bommaritollc.com/id/01a0ddfe-b307-75a4-8dde-fb3f994a069d.ttl), [JSON-LD](https://ontology.bommaritollc.com/id/01a0ddfe-b307-75a4-8dde-fb3f994a069d.jsonld), [N-Triples](https://ontology.bommaritollc.com/id/01a0ddfe-b307-75a4-8dde-fb3f994a069d.nt), [HTML](https://ontology.bommaritollc.com/id/01a0ddfe-b307-75a4-8dde-fb3f994a069d)
Cite as: Duncan Lake. bc-ontology, release 0.1.0-rc15, 2026-09-28. https://ontology.bommaritollc.com/id/01a0ddfe-b307-75a4-8dde-fb3f994a069d
Release 0.1.0-rc15, graph hash 90961d0d6b29954f5f0257ebc2d1d12c6ce580def6a2f45cbf04d248aa879e72.