WaterML 2.0 Part 2 is an OGC Standard. Copyright (c) 2015 Open Geospatial Consortium. To obtain additional rights of use, visit http://www.opengeospatial.org/legal/ . This schema package describes 'gauging' observations -- observations made for the development of a conversion. The result of an individual gauging, comprising of two measurements of related properties. The measurement of the input property. The measurement of the output property. Captures metadata relating to the gauging observation. Captures the status of the gauging in terms of its use in conversion relationships. Date that the gauging observation was approved. A description of the observation process used for the gauging. Describes the method that was used for observing the input property. For example: flow weighted mean gauge height. Describes the method that was used for observing the output property. For example: area-velocity, ADCP, mechanical meter etc. Captures conditions affecting the measurement being taken, these properties apply to stream gauging observations. The state of the stream while the gauging was taking place (e.g. was the stream rising.). See also stageStart/EndOfObservation. Conditions adversely affecting the controls ability to function normally: e.g. weed growth, ice etc. The distance to the monitoring point from the measurement location. A relative direction from the monitoring point to the location the measurement was made. The observed input property (e.g. stage) at the start of the observation period. The observed input property (e.g. stage) at the end of the observation period. The pair of properties that are being measured by the gauging observation. The property that is being directly measured by the observation. The property that is being estimated. E.g. discharge. A type capturing metadata typical for stream gauging. The width of the cross-section that is being measured. The area of the cross-section that is being measured. The perimeter of the cross-section that is in contact with water flow. The line (start coordinates, end coordinates) that describes the segment of the river that was measured.