# Number Twenty-one Lake

Number Twenty-one Lake is a lake in [Hope Township](https://ontology.bommaritollc.com/id/01a0ca47-7ccb-7662-b52e-c2847b5be211), [Barry County](https://ontology.bommaritollc.com/id/01a0ca47-5a13-7757-80a2-201e49e8447d), [Michigan](https://ontology.bommaritollc.com/id/01a0ca47-57ff-7219-9e2f-cdc1b39bd0fa) (25.5 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-c19a-7229-9a7c-21f4cca182f2>

Within: [Michigan](https://ontology.bommaritollc.com/id/01a0ca47-57ff-7219-9e2f-cdc1b39bd0fa) › [Barry County](https://ontology.bommaritollc.com/id/01a0ca47-5a13-7757-80a2-201e49e8447d) › [Hope Township](https://ontology.bommaritollc.com/id/01a0ca47-7ccb-7662-b52e-c2847b5be211)

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

Location: 42.54240, -85.37813 (box -85.38512, 42.53961, -85.37290, 42.54536; west, south, east, north)

- `adms:identifier`: [gnis 633435](https://ontology.bommaritollc.com/id/01a0ddfe-c19a-7229-9a7c-21fd6657fc19)
- `dcterms:type`: [lake](https://ontology.bommaritollc.com/vocab/geo/gnisLake)
- `geo:hasDefaultGeometry`: [shape of Number Twenty-one Lake](https://ontology.bommaritollc.com/id/01a0de2c-d18c-7174-aab6-9fd867415f03)
- `geo:hasGeometry`:
  - [point of Number Twenty-one Lake](https://ontology.bommaritollc.com/id/01a0ddfe-fad8-7204-afe1-1cbd2aea7b7f)
  - [shape of Number Twenty-one Lake](https://ontology.bommaritollc.com/id/01a0de2c-d18c-7174-aab6-9fd867415f03)
- `geo:hasMetricArea`: 255069.3 (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-c19a-7229-9a7c-21f3318ab801)
  - [evidence from https://3dhp.nationalmap.gov/arcgis/rest/services/usgs\_3dhp\_all/FeatureServer](https://ontology.bommaritollc.com/id/01a0de32-5697-701d-8cc6-448186e75741)
  - [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)
  - [Hope Township](https://ontology.bommaritollc.com/id/01a0ca47-7ccb-7662-b52e-c2847b5be211)
- `skos:prefLabel`: Number Twenty-one Lake

## Elsewhere

- [Wikidata Q33295494](https://www.wikidata.org/wiki/Q33295494) (proposed match (exactMatch))
- [USGS GNIS 633435](https://edits.nationalmap.gov/apps/gaz-domestic/public/summary/633435) (gnis)
- [OpenStreetMap](https://www.openstreetmap.org/?mlat=42.54240&mlon=-85.37813#map=14/42.54240/-85.37813) (42.54240, -85.37813)
- [Google Maps](https://www.google.com/maps/search/?api=1&query=42.54240,-85.37813)
- [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/Q33295494 (proposed)](https://ontology.bommaritollc.com/id/01a0ddff-76af-7140-b52c-3a093d74ed7f)

---
Also as: [Turtle](https://ontology.bommaritollc.com/id/01a0ddfe-c19a-7229-9a7c-21f4cca182f2.ttl), [JSON-LD](https://ontology.bommaritollc.com/id/01a0ddfe-c19a-7229-9a7c-21f4cca182f2.jsonld), [N-Triples](https://ontology.bommaritollc.com/id/01a0ddfe-c19a-7229-9a7c-21f4cca182f2.nt), [HTML](https://ontology.bommaritollc.com/id/01a0ddfe-c19a-7229-9a7c-21f4cca182f2)
Cite as: Number Twenty-one Lake. bc-ontology, release 0.1.0-rc12, 2026-09-27. https://ontology.bommaritollc.com/id/01a0ddfe-c19a-7229-9a7c-21f4cca182f2
Release 0.1.0-rc12, graph hash a20f66b983549f220c6f061b7e40233771a06aa47a0c0aede95a2a57ee2e9553.