ODM2 SamplingFeatureGeotype Controlled Vocabulary ODM2 Working Group A vocabulary for describing the geospatial feature type associated with a SamplingFeature. For example, Site SamplingFeatures are represented as points. In ODM2, each SamplingFeature may have only one geospatial type, but a geospatial types may range from simple points to a complex polygons or even three dimensional volumes. Volume A three dimensional space enclosed by some closed boundary. 3D Definition adapted from wikipedia