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Linear referencing, also called linear reference system or linear referencing system (LRS), is a method of spatial referencing over linear or curvilinear elements, such as roads or rivers. In LRS, the locations of physical features are described parametrically in terms of a single curvilinear coordinate , typically the distance traveled from a ...
An accurately measured line of known length on the Earth's surface, used as a reference line in triangulation and other surveying operations. [4] basin Another name for a depression, particularly one that is approximately circular, level or nearly level at the bottom, and/or surrounded on all sides by land of uniform elevation. batholith
1. In a building facade, the space between the top of the window in one story and the sill of the window in the story above. 2. The space between two arches or between an arch and a rectangular enclosure. Spere The fixed structure between the great hall and the screens passage in an English medieval timber house. Spire
Mid-pupillary line: A line running vertically down the face through the midpoint of the pupil when looking directly forward. Mid-inguinal point: A point midway between the anterior superior iliac spine and the pubic symphysis. Intercristal line: A transverse line passing across the lumbar spine between the superior aspects of the iliac crests.
Point of reference is the intentional use of one thing to indicate something else, and may refer to: Reference point (disambiguation), general usage;
Technical drawing with references and geometric specifications. A datum reference or just datum (plural: datums [Note 1]) is some geometrically important part of an object—such as a point, line, plane, hole, set of holes, or pair of surfaces—that serves as a reference in defining the geometry of the object and (often) in measuring aspects of the actual geometry to assess how closely they ...
In geology, a sill is a tabular sheet intrusion that has intruded between older layers of sedimentary rock, beds of volcanic lava or tuff, or along the direction of foliation in metamorphic rock. A sill is a concordant intrusive sheet , meaning that it does not cut across preexisting rock beds.
a touches b, they have at least one boundary point in common, but no interior points. Contains: a ∩ b = b: Covers: a ο ∩ b = b b lies in the interior of a (extends Contains). Other definitions: "no points of b lie in the exterior of a", or "Every point of b is a point of (the interior of) a". CoveredBy Covers(b,a) Within: a ∩ b = a