<?xml version="1.0" encoding="UTF-8"?> <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:ns0="http://www.opengis.net/ont/sf#" xmlns:owl="http://www.w3.org/2002/07/owl#" xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#" xmlns:metadata_def="http://data.bioontology.org/metadata/def/" xmlns:metadata="http://data.bioontology.org/metadata/" xmlns:ns1="http://www.opengis.net/ont/"> <owl:Class rdf:about="http://www.opengis.net/ont/sf#Surface"> <rdfs:subClassOf rdf:resource="http://www.opengis.net/ont/sf#Geometry"/> <metadata_def:mappingSameURI rdf:resource="http://www.opengis.net/ont/sf#Surface"/> <metadata_def:mappingLoom>surface</metadata_def:mappingLoom> <metadata_def:prefLabel>Surface</metadata_def:prefLabel> <rdfs:comment xml:lang="en"> A Surface is a 2-dimensional geometric object. A simple Surface may consists of a single patch that is associated with one exterior boundary and 0 or more interior boundaries. A single such Surface patch in 3-dimensional space is isometric to planar Surfaces, by a simple affine rotation matrix that rotates the patch onto the plane z = 0. If the patch is not vertical, the projection onto the same plane is an isomorphism, and can be represented as a linear transformation, i.e. an affine. Polyhedral Surfaces are formed by stitching together such simple Surfaces patches along their common boundaries. Such polyhedral Surfaces in a 3-dimensional space may not be planar as a whole, depending on the orientation of their planar normals. If all the patches are in alignment (their normals are parallel), then the whole stitched polyhedral surface is co-planar and can be represented as a single patch if it is connected. The boundary of a simple Surface is the set of closed Curves corresponding to its exterior and interior boundaries. A Polygon is a simple Surface that is planar. A PolyhedralSurface is a simple surface, consisting of some number of Polygon patches or facets. If a PolyhedralSurface is closed, then it bounds a solid. A MultiSurface containing a set of closed PolyhedralSurfaces can be used to represent a Solid object with holes. </rdfs:comment> <metadata:prefixIRI>sf:Surface</metadata:prefixIRI> <rdfs:isDefinedBy rdf:resource="http://www.opengis.net/ont/sf"/> <rdfs:label xml:lang="en">Surface</rdfs:label> </owl:Class> <rdf:Description rdf:about="http://www.opengis.net/ont/sf#Polygon"> <rdfs:subClassOf> <rdf:Description rdf:about="http://www.opengis.net/ont/sf#Surface"> <metadata_def:mappingSameURI rdf:resource="http://www.opengis.net/ont/sf#Surface"/> </rdf:Description> </rdfs:subClassOf> </rdf:Description> <rdf:Description rdf:about="http://www.opengis.net/ont/sf#PolyhedralSurface"> <rdfs:subClassOf rdf:resource="http://www.opengis.net/ont/sf#Surface"/> </rdf:Description> </rdf:RDF>