# Mahan Swamp

Mahan Swamp is a swamp in [Kalkaska Township](https://ontology.bommaritollc.com/id/01a0ca47-75fa-7327-a8f4-066307faa722), [Kalkaska County](https://ontology.bommaritollc.com/id/01a0ca47-5dbc-76a7-9cd6-a573389e3d9a), [Michigan](https://ontology.bommaritollc.com/id/01a0ca47-57ff-7219-9e2f-cdc1b39bd0fa), in the [Boardman River (HUC10 0406010505)](https://ontology.bommaritollc.com/id/01a0de92-1e03-70a0-9c77-d8b3cb3d732a) watershed.

IRI: <https://ontology.bommaritollc.com/id/01a0ddfe-bdce-7261-91ca-73a7a841323e>

Within: [Michigan](https://ontology.bommaritollc.com/id/01a0ca47-57ff-7219-9e2f-cdc1b39bd0fa) › [Kalkaska County](https://ontology.bommaritollc.com/id/01a0ca47-5dbc-76a7-9cd6-a573389e3d9a) › [Kalkaska Township](https://ontology.bommaritollc.com/id/01a0ca47-75fa-7327-a8f4-066307faa722)

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

Location: 44.76501, -85.09977 (box -85.09977, 44.76501, -85.09977, 44.76501; west, south, east, north)

- `adms:identifier`: [gnis 631330](https://ontology.bommaritollc.com/id/01a0ddfe-bdce-7261-91ca-73afcd692194)
- `dcterms:type`: [swamp](https://ontology.bommaritollc.com/vocab/geo/gnisSwamp)
- `geo:hasDefaultGeometry`: [point of Mahan Swamp](https://ontology.bommaritollc.com/id/01a0ddfe-f543-7302-8661-506820520ce1)
- `geo:hasGeometry`: [point of Mahan Swamp](https://ontology.bommaritollc.com/id/01a0ddfe-f543-7302-8661-506820520ce1)
- **in watershed** (`bcgeo:inWatershed`): [Boardman River (HUC10 0406010505)](https://ontology.bommaritollc.com/id/01a0de92-1e03-70a0-9c77-d8b3cb3d732a)
- `prov:wasDerivedFrom`:
  - [evidence from https://prd-tnm.s3.amazonaws.com/StagedProducts/GeographicNames/DomesticNames/DomesticNames\_MI\_Text.zip](https://ontology.bommaritollc.com/id/01a0ddfe-bdce-7261-91ca-73a6e8ef30b3)
  - [evidence from https://3dhp.nationalmap.gov/arcgis/rest/services/usgs\_3dhp\_all/FeatureServer](https://ontology.bommaritollc.com/id/01a0de32-5399-7202-860c-3aaea84c7c8a)
  - [evidence from https://hydro.nationalmap.gov/arcgis/rest/services/wbd/MapServer](https://ontology.bommaritollc.com/id/01a0de92-17b7-774a-a58c-36327c7cc37d)
- `schema:containedInPlace`:
  - [Kalkaska County](https://ontology.bommaritollc.com/id/01a0ca47-5dbc-76a7-9cd6-a573389e3d9a)
  - [Kalkaska Township](https://ontology.bommaritollc.com/id/01a0ca47-75fa-7327-a8f4-066307faa722)
- `skos:prefLabel`: Mahan Swamp

## Elsewhere

- [Wikidata Q33176009](https://www.wikidata.org/wiki/Q33176009) (proposed match (exactMatch))
- [USGS GNIS 631330](https://edits.nationalmap.gov/apps/gaz-domestic/public/summary/631330) (gnis)
- [OpenStreetMap](https://www.openstreetmap.org/?mlat=44.76501&mlon=-85.09977#map=14/44.76501/-85.09977) (44.76501, -85.09977)
- [Google Maps](https://www.google.com/maps/search/?api=1&query=44.76501,-85.09977)
- [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/Q33176009 (proposed)](https://ontology.bommaritollc.com/id/01a0ddff-75f8-775d-9df1-f66879a542bb)

---
Also as: [Turtle](https://ontology.bommaritollc.com/id/01a0ddfe-bdce-7261-91ca-73a7a841323e.ttl), [JSON-LD](https://ontology.bommaritollc.com/id/01a0ddfe-bdce-7261-91ca-73a7a841323e.jsonld), [N-Triples](https://ontology.bommaritollc.com/id/01a0ddfe-bdce-7261-91ca-73a7a841323e.nt), [HTML](https://ontology.bommaritollc.com/id/01a0ddfe-bdce-7261-91ca-73a7a841323e)
Cite as: Mahan Swamp. bc-ontology, release 0.1.0-rc15, 2026-09-28. https://ontology.bommaritollc.com/id/01a0ddfe-bdce-7261-91ca-73a7a841323e
Release 0.1.0-rc15, graph hash 90961d0d6b29954f5f0257ebc2d1d12c6ce580def6a2f45cbf04d248aa879e72.