Space Hans Cools, MD, Agfa Healthcare, Belgium Agfa Healthcare/Belgium Formal description of space. OWL Full spatial resource Resource with 0 to 3 dimensions. spatial point Spatial resource without spatial dimension. one-dimensional spatial resource Spatial resource having 1 spatial dimension. curve one-dimensional spatial resource consisting of points extending in any direction. line Straight curve OR curve without curvature OR curve consisting of points extending in one direction. two-dimensional spatial resource Spatial resource having 2 spatial dimensions. three-dimensional spatial resource Spatial resource having 3 spatial dimensions. polygon Flat two-dimensional spatial resource with at least 3 straight lines joined to form a closed chain. side Straight line of a polygon. quadrilateral Polygon with four sides. rectangle Quadrilateral with four right angles. length Longer side of a rectangle. width Shorter side of a rectangle. square Rectangle with two adjacent sides having equal length OR regular quadrilateral. surface Two-dimensional boundary of a 3-dimensional spatial resource. outer surface Outer two-dimensional boundary of a 3-dimensional spatial resource. centroid Intersection of all straight lines dividing object X in 2-dimensional space into two parts of equal moment about the line. Informally, it is the "average" (arithmetic mean) of all points of X. The definition extends to any object X in n-dimensional space: its centroid is the intersection of all hyperplanes that divide X into two parts of equal moment. X coordinate X coordinate in a Cartesian coordinate system. Y coordinate Y coordinate in a Cartesian coordinate system. Z coordinate Z coordinate in a Cartesian coordinate system. transferring Bringing something from one place to another. transfer Something brought from one place to another. Specifying a spatial resource wherein a spatial resource is located. Specifying a spatial resource located in a spatial resource. Specifying a surface whereon a spatial resource is located. Specifying a spatial resource located on a surface. Specifying something physically contained by something else. Specifying something physically containing something else. Specifying a side of a polygon. Specifying a length of a rectangle. Specifying a width of a rectangle. Specifying a point of a spatial resource. Specifying a centroid of a spatial thing. Specifying an upper left angle of a rectangle. Specifying a lower left angle of a rectangle. Specifying a position of a spatial resource. A position is described by 0 to n coordinates. Specifying an X coordinate of a point in space. Specifying a Y coordinate of a point in space. Specifying a Z coordinate of a point in space. Specifying a location something is being transferred from. Specifying a location something is being transferred to. Specifying a location something is transferred from. Specifying a location something is transferred to. Specifying something transferred in a transferring. Specifying something transferred.