bc-ontologyUS governments, their divisions, offices and public pages, and Michigan's law and geography

Pre-release: this release has not been published. Identifiers are permanent; descriptions may still change.

Sigma Swamp

Sigma Swamp is a swamp in Oliver Township, Kalkaska County, Michigan, in the North Branch Manistee River-Manistee River (HUC10 0406010301) watershed.

https://ontology.bommaritollc.com/id/01a0ddfe-c8dc-7546-8f97-728dc783b25f

geo:Featureschema:Place

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Cite this

Sigma Swamp. bc-ontology, release 0.1.0-rc12, 2026-09-27. https://ontology.bommaritollc.com/id/01a0ddfe-c8dc-7546-8f97-728dc783b25f

Drawn from the release's geometry, simplified for the screen; base map © OpenStreetMap contributors or USGS.

Elsewhere

Wikidata Q33176372proposed match (exactMatch)

USGS GNIS 637892gnis

OpenStreetMap44.66168, -85.03282

Sourceprd-tnm.s3.amazonaws.com

Source3dhp.nationalmap.gov

Sourcehydro.nationalmap.gov

Facts

adms:identifier	gnis 637892
dcterms:type	swamp
geo:hasDefaultGeometry	point of Sigma Swamp
geo:hasGeometry	point of Sigma Swamp
in watershed	North Branch Manistee River-Manistee River (HUC10 0406010301)
prov:wasDerivedFrom	evidence from https://prd-tnm.s3.amazonaws.com/StagedProducts/GeographicNames/DomesticNames/DomesticNames_MI_Text.zip evidence from https://3dhp.nationalmap.gov/arcgis/rest/services/usgs_3dhp_all/FeatureServer evidence from https://hydro.nationalmap.gov/arcgis/rest/services/wbd/MapServer
schema:containedInPlace	Kalkaska County Oliver Township
skos:prefLabel	Sigma Swampen

Related

Mappings (1)owl:annotatedSource

exactMatch http://www.wikidata.org/entity/Q33176372 (proposed)