# Ludwig Swamp

Ludwig Swamp is a swamp in [Alcona Township](https://ontology.bommaritollc.com/id/01a0ca47-6ae6-7119-8aa5-c5296cd2639f), [Alcona County](https://ontology.bommaritollc.com/id/01a0ca47-59b8-7700-8c5c-af7c3d92657c), [Michigan](https://ontology.bommaritollc.com/id/01a0ca47-57ff-7219-9e2f-cdc1b39bd0fa), in the [Lower South Branch Thunder Bay River (HUC10 0407000605)](https://ontology.bommaritollc.com/id/01a0de92-1e36-7028-a349-27b491f25a30) watershed.

IRI: <https://ontology.bommaritollc.com/id/01a0ddfe-d5e8-74ff-822b-56168787e0e7>

Within: [Michigan](https://ontology.bommaritollc.com/id/01a0ca47-57ff-7219-9e2f-cdc1b39bd0fa) › [Alcona County](https://ontology.bommaritollc.com/id/01a0ca47-59b8-7700-8c5c-af7c3d92657c) › [Alcona Township](https://ontology.bommaritollc.com/id/01a0ca47-6ae6-7119-8aa5-c5296cd2639f)

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

Location: 44.80335, -83.49636 (box -83.49636, 44.80335, -83.49636, 44.80335; west, south, east, north)

- `adms:identifier`: [gnis 1620644](https://ontology.bommaritollc.com/id/01a0ddfe-d5e8-74ff-822b-561eabd38c55)
- `dcterms:type`: [swamp](https://ontology.bommaritollc.com/vocab/geo/gnisSwamp)
- `geo:hasDefaultGeometry`: [point of Ludwig Swamp](https://ontology.bommaritollc.com/id/01a0ddff-1344-715c-b94c-87d706b427cb)
- `geo:hasGeometry`: [point of Ludwig Swamp](https://ontology.bommaritollc.com/id/01a0ddff-1344-715c-b94c-87d706b427cb)
- **in watershed** (`bcgeo:inWatershed`): [Lower South Branch Thunder Bay River (HUC10 0407000605)](https://ontology.bommaritollc.com/id/01a0de92-1e36-7028-a349-27b491f25a30)
- `prov:wasDerivedFrom`:
  - [evidence from https://prd-tnm.s3.amazonaws.com/StagedProducts/GeographicNames/DomesticNames/DomesticNames\_MI\_Text.zip](https://ontology.bommaritollc.com/id/01a0ddfe-d5e8-74ff-822b-5615b8f14088)
  - [evidence from https://3dhp.nationalmap.gov/arcgis/rest/services/usgs\_3dhp\_all/FeatureServer](https://ontology.bommaritollc.com/id/01a0de32-65bf-7087-ad2c-188df02f8c12)
  - [evidence from https://hydro.nationalmap.gov/arcgis/rest/services/wbd/MapServer](https://ontology.bommaritollc.com/id/01a0de92-17f5-7054-8bad-4d7746ef8ab1)
- `schema:containedInPlace`:
  - [Alcona County](https://ontology.bommaritollc.com/id/01a0ca47-59b8-7700-8c5c-af7c3d92657c)
  - [Alcona Township](https://ontology.bommaritollc.com/id/01a0ca47-6ae6-7119-8aa5-c5296cd2639f)
- `skos:prefLabel`: Ludwig Swamp

## Elsewhere

- [Wikidata Q33176003](https://www.wikidata.org/wiki/Q33176003) (proposed match (exactMatch))
- [USGS GNIS 1620644](https://edits.nationalmap.gov/apps/gaz-domestic/public/summary/1620644) (gnis)
- [OpenStreetMap](https://www.openstreetmap.org/?mlat=44.80335&mlon=-83.49636#map=14/44.80335/-83.49636) (44.80335, -83.49636)
- [Google Maps](https://www.google.com/maps/search/?api=1&query=44.80335,-83.49636)
- [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/Q33176003 (proposed)](https://ontology.bommaritollc.com/id/01a0ddff-7907-732a-b076-4dfdabee11f6)

---
Also as: [Turtle](https://ontology.bommaritollc.com/id/01a0ddfe-d5e8-74ff-822b-56168787e0e7.ttl), [JSON-LD](https://ontology.bommaritollc.com/id/01a0ddfe-d5e8-74ff-822b-56168787e0e7.jsonld), [N-Triples](https://ontology.bommaritollc.com/id/01a0ddfe-d5e8-74ff-822b-56168787e0e7.nt), [HTML](https://ontology.bommaritollc.com/id/01a0ddfe-d5e8-74ff-822b-56168787e0e7)
Cite as: Ludwig Swamp. bc-ontology, release 0.1.0-rc12, 2026-09-27. https://ontology.bommaritollc.com/id/01a0ddfe-d5e8-74ff-822b-56168787e0e7
Release 0.1.0-rc12, graph hash a20f66b983549f220c6f061b7e40233771a06aa47a0c0aede95a2a57ee2e9553.