# Robertson Drain

Robertson Drain is a canal in [Michigan](https://ontology.bommaritollc.com/id/01a0ca47-57ff-7219-9e2f-cdc1b39bd0fa) (4.8 km long), in the [Black River (HUC10 0409000102)](https://ontology.bommaritollc.com/id/01a0de92-1ec7-7199-a92b-2f1f3f15431a) watershed.

IRI: <https://ontology.bommaritollc.com/id/01a0ddfe-dbff-778a-87ba-2a6aa68ac8be>

Within: [Michigan](https://ontology.bommaritollc.com/id/01a0ca47-57ff-7219-9e2f-cdc1b39bd0fa)

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

Location: 43.14780, -82.70159 (box -82.71552, 43.13725, -82.69952, 43.16616; west, south, east, north)

- `adms:identifier`: [gnis 1624868](https://ontology.bommaritollc.com/id/01a0ddfe-dc00-749b-b3e2-df7dfe02914c)
- `dcterms:type`: [canal](https://ontology.bommaritollc.com/vocab/geo/gnisCanal)
- `geo:hasDefaultGeometry`: [shape of Robertson Drain](https://ontology.bommaritollc.com/id/01a0de2c-e1b9-7312-9f18-7f34478c8c82)
- `geo:hasGeometry`:
  - [point of Robertson Drain](https://ontology.bommaritollc.com/id/01a0ddff-1945-7220-a843-78f0ae815f1e)
  - [shape of Robertson Drain](https://ontology.bommaritollc.com/id/01a0de2c-e1b9-7312-9f18-7f34478c8c82)
- `geo:hasMetricLength`: 4828.6 (xsd:double)
- **in watershed** (`bcgeo:inWatershed`): [Black River (HUC10 0409000102)](https://ontology.bommaritollc.com/id/01a0de92-1ec7-7199-a92b-2f1f3f15431a)
- `prov:wasDerivedFrom`:
  - [evidence from https://prd-tnm.s3.amazonaws.com/StagedProducts/GeographicNames/DomesticNames/DomesticNames\_MI\_Text.zip](https://ontology.bommaritollc.com/id/01a0ddfe-dbff-778a-87ba-2a692975bcc5)
  - [evidence from https://3dhp.nationalmap.gov/arcgis/rest/services/usgs\_3dhp\_all/FeatureServer](https://ontology.bommaritollc.com/id/01a0de32-6a62-7182-bb40-08a4b4f4f484)
  - [evidence from https://hydro.nationalmap.gov/arcgis/rest/services/wbd/MapServer](https://ontology.bommaritollc.com/id/01a0de92-18a2-71b0-8b35-553c9c3e54af)
- `schema:containedInPlace`:
  - [Sanilac County](https://ontology.bommaritollc.com/id/01a0ca47-5953-7311-ac48-68da826dd41b)
  - [St. Clair County](https://ontology.bommaritollc.com/id/01a0ca47-5a01-72ff-8fe9-1447a694275e)
  - [Greenwood Township](https://ontology.bommaritollc.com/id/01a0ca47-7094-7671-ba31-94b101a82808)
  - [Fremont Township](https://ontology.bommaritollc.com/id/01a0ca47-7cd1-7618-8ec3-65bfdff467f5)
- `skos:prefLabel`: Robertson Drain

## Elsewhere

- [Wikidata Q33211737](https://www.wikidata.org/wiki/Q33211737) (proposed match (exactMatch))
- [USGS GNIS 1624868](https://edits.nationalmap.gov/apps/gaz-domestic/public/summary/1624868) (gnis)
- [OpenStreetMap](https://www.openstreetmap.org/?mlat=43.14780&mlon=-82.70159#map=14/43.14780/-82.70159) (43.14780, -82.70159)
- [Google Maps](https://www.google.com/maps/search/?api=1&query=43.14780,-82.70159)
- [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/Q33211737 (proposed)](https://ontology.bommaritollc.com/id/01a0ddff-79e6-71fe-860e-27f518512d7a)

---
Also as: [Turtle](https://ontology.bommaritollc.com/id/01a0ddfe-dbff-778a-87ba-2a6aa68ac8be.ttl), [JSON-LD](https://ontology.bommaritollc.com/id/01a0ddfe-dbff-778a-87ba-2a6aa68ac8be.jsonld), [N-Triples](https://ontology.bommaritollc.com/id/01a0ddfe-dbff-778a-87ba-2a6aa68ac8be.nt), [HTML](https://ontology.bommaritollc.com/id/01a0ddfe-dbff-778a-87ba-2a6aa68ac8be)
Cite as: Robertson Drain. bc-ontology, release 0.1.0-rc15, 2026-09-28. https://ontology.bommaritollc.com/id/01a0ddfe-dbff-778a-87ba-2a6aa68ac8be
Release 0.1.0-rc15, graph hash 90961d0d6b29954f5f0257ebc2d1d12c6ce580def6a2f45cbf04d248aa879e72.