This ontology supports querying the SAWGraph Knowledge Graph and the KnowWhereGraph. It is an adaptation of the spatial ontology originally published by the KnowWhereGraph Project
KWG Project: http://stko-kwg.geog.ucsb.edu/lod/ontology/
SAWGraph's spatial ontology - an extension of KnowWhereGraph's spatial ontology
topological connection (spatial contact) (sawgraph)
Administrative regoins as defined by the Global Administrative Area Database (GADM); see https://gadm.org/metadata.html
GADM level 0 administrative regions which represent countries.
GADM level 1 administrative regions which are the highest level of division of a country, such as US states, Canadian provinces, or French departments.
GADM level 2 administrative regions which further subdivide states, provinces, or departments. Examples include counties in the US
GADM level 3 administrative regions. In the US, these are subdivisions of counties, formally known as county subdivisions, such as minor civil divisions (e.g. towns ot townships) or census county divisions.