# Bertha Lake

Bertha Lake is a lake in [Lincoln Township](https://ontology.bommaritollc.com/id/01a0ca47-76a2-7436-a686-bb49330b125a), [Clare County](https://ontology.bommaritollc.com/id/01a0ca47-594c-7471-8e7b-5f4b609c3823), [Michigan](https://ontology.bommaritollc.com/id/01a0ca47-57ff-7219-9e2f-cdc1b39bd0fa) (14.5 ha), in the [Tobacco River (HUC10 0408020103)](https://ontology.bommaritollc.com/id/01a0de92-1e81-728d-85f5-ffced2e0ec33) watershed.

IRI: <https://ontology.bommaritollc.com/id/01a0ddfe-ab8c-75d2-a1c0-3e3fb91ea8f3>

Within: [Michigan](https://ontology.bommaritollc.com/id/01a0ca47-57ff-7219-9e2f-cdc1b39bd0fa) › [Clare County](https://ontology.bommaritollc.com/id/01a0ca47-594c-7471-8e7b-5f4b609c3823) › [Lincoln Township](https://ontology.bommaritollc.com/id/01a0ca47-76a2-7436-a686-bb49330b125a)

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

Location: 43.93306, -84.89224 (box -84.89860, 43.93066, -84.88954, 43.93557; west, south, east, north)

- `adms:identifier`: [gnis 621179](https://ontology.bommaritollc.com/id/01a0ddfe-ab8d-7754-9348-5edc5a3b448d)
- `dcterms:type`: [lake](https://ontology.bommaritollc.com/vocab/geo/gnisLake)
- `geo:hasDefaultGeometry`: [shape of Bertha Lake](https://ontology.bommaritollc.com/id/01a0de2c-c4b0-711d-8619-823b3a546294)
- `geo:hasGeometry`:
  - [point of Bertha Lake](https://ontology.bommaritollc.com/id/01a0ddfe-e2b1-774d-94a5-ff9a7eb27562)
  - [shape of Bertha Lake](https://ontology.bommaritollc.com/id/01a0de2c-c4b0-711d-8619-823b3a546294)
- `geo:hasMetricArea`: 144757.1 (xsd:double)
- **in watershed** (`bcgeo:inWatershed`): [Tobacco River (HUC10 0408020103)](https://ontology.bommaritollc.com/id/01a0de92-1e81-728d-85f5-ffced2e0ec33)
- `prov:wasDerivedFrom`:
  - [evidence from https://prd-tnm.s3.amazonaws.com/StagedProducts/GeographicNames/DomesticNames/DomesticNames\_MI\_Text.zip](https://ontology.bommaritollc.com/id/01a0ddfe-ab8c-75d2-a1c0-3e3e8bdcf5c5)
  - [evidence from https://3dhp.nationalmap.gov/arcgis/rest/services/usgs\_3dhp\_all/FeatureServer](https://ontology.bommaritollc.com/id/01a0de32-45dd-73e2-a297-1ed857f2d36d)
  - [evidence from https://hydro.nationalmap.gov/arcgis/rest/services/wbd/MapServer](https://ontology.bommaritollc.com/id/01a0de92-184b-719f-86b8-af4a518e77f6)
- `schema:containedInPlace`:
  - [Clare County](https://ontology.bommaritollc.com/id/01a0ca47-594c-7471-8e7b-5f4b609c3823)
  - [Lincoln Township](https://ontology.bommaritollc.com/id/01a0ca47-76a2-7436-a686-bb49330b125a)
- `skos:altLabel`: Mud Lake
- `skos:prefLabel`: Bertha Lake

## Elsewhere

- [Wikidata Q33230871](https://www.wikidata.org/wiki/Q33230871) (proposed match (exactMatch))
- [USGS GNIS 621179](https://edits.nationalmap.gov/apps/gaz-domestic/public/summary/621179) (gnis)
- [OpenStreetMap](https://www.openstreetmap.org/?mlat=43.93306&mlon=-84.89224#map=14/43.93306/-84.89224) (43.93306, -84.89224)
- [Google Maps](https://www.google.com/maps/search/?api=1&query=43.93306,-84.89224)
- [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/Q33230871 (proposed)](https://ontology.bommaritollc.com/id/01a0ddff-737e-7190-86f0-3abd861f473a)

---
Also as: [Turtle](https://ontology.bommaritollc.com/id/01a0ddfe-ab8c-75d2-a1c0-3e3fb91ea8f3.ttl), [JSON-LD](https://ontology.bommaritollc.com/id/01a0ddfe-ab8c-75d2-a1c0-3e3fb91ea8f3.jsonld), [N-Triples](https://ontology.bommaritollc.com/id/01a0ddfe-ab8c-75d2-a1c0-3e3fb91ea8f3.nt), [HTML](https://ontology.bommaritollc.com/id/01a0ddfe-ab8c-75d2-a1c0-3e3fb91ea8f3)
Cite as: Bertha Lake. bc-ontology, release 0.1.0-rc15, 2026-09-28. https://ontology.bommaritollc.com/id/01a0ddfe-ab8c-75d2-a1c0-3e3fb91ea8f3
Release 0.1.0-rc15, graph hash 90961d0d6b29954f5f0257ebc2d1d12c6ce580def6a2f45cbf04d248aa879e72.