samplingManifold.xsd SamplingFeatures are feature types that are used primarily for making observations: SamplingFeature, and collections are described in samplingBase.xsd SamplingPoint (0-D) SamplingCurve (1-D) SamplingSurface (2-D) SamplingSolid (3-D) are described in this schema document In many cases the properties of interest vary within the site, so may be represented as a coverage associated with the SamplingFeature. Copyright (c) 2008 Open Geospatial Consortium - see http://www.opengeospatial.org/ogc/software A "SamplingPoint" is an identified position (0-D geospatial feature). It may be revisited for various purposes, in particular to retrieve multiple specimens or make repeated or complementary observations. The position property of the SamplingPoint provides the value of the position property of observations an specimens associated with the SamplingPoint. By using the SamplingPoint feature, this position information and any metadata associated with it may be encoded in one place, i.e. normalised, and then re-used _by reference_ on other feature instances associated with it. SamplingPoints are often known as Stations SpatiallyExtensiveSamplingFeature is the root class for sampling manifolds that are extensive in 1- 2- or 3-D. A "SamplingCurve" is an identified 1-D spatial feature. It may be revisited for various purposes, in particular to retrieve multiple specimens or make repeated or complementary observations. Specialized names for SamplingCurve include Sounding, ObservationWell, FlightLine, Transect. A "SamplingCurve" is an identified 1-D spatial feature. It may be revisited for various purposes, in particular to retrieve multiple specimens or make repeated or complementary observations. Specialized names for SamplingCurve include Profile, ObservationWell, FlightLine, Transect. A "SamplingSurface" is an identified 2-D spatial feature. It may be used for various purposes, in particular for observations of cross sections through features. Specialized names for SamplingSurface include CrossSection, Section, Flitch, Swath, Scene, MapHorizon. A "SamplingSurface" is an identified 2-D spatial feature. It may be used for various purposes, in particular for observations of cross sections through features. Specialized names for SamplingSurface include CrossSection, Section, Flitch, Swath, Scene, MapHorizon. A "SamplingSolid" is an identified 3-D spatial feature used in sampling. A "SamplingSolid" is an identified 3-D spatial feature used in sampling.