Feature Measurement Observed Property Observation Observation Offering Procedure Sensor Sensor System

4 Copyright © 2012 Open Geospatial Consortium. ISO 19136:2007, Geographic information — Geography Markup Language GML 2 ISO 19143:2010, Geographic information — Filter Encoding 3 ISO 19156:2011, Geographic information — Observations and Measurements 4 OGC Abstract Specification Topic 20 - Geographic Information: Observations and Measurements. Version 2.0.0. OGC document 10-004r3. http:www.opengis.netdocom2.0 OGC® Policy Standard, The Specification Model - A Standard for Modular specifications, Version 1.0.0, OGC document 08-131r3. http:www.opengis.netdocmodular-spec1.0 OpenGIS® Encoding Standard, Geography Markup Language, Version 3.2.1, OGC document 07-036. http:www.opengis.netdocgml3.2.1 OpenGIS® Encoding Standard, SWE Common Data Model, Version 2.0, OGC document 08- 094. http:www.opengis.netdocswe2.0 OpenGIS® Encoding Standard, SensorML Version 1.0 Schema - Corrigendum 1, Version 1.0.1, OGC document 07-022r2. http:www.opengis.netdocsensorml1.0 OpenGIS® Implementation Standard, Observations and Measurements - XML Implementation, Version 2.0, OGC document 10-025. http:www.opengis.netdocomxml2.0 OpenGIS® Implementation Standard, SWE Service Model, Version 2.0, OGC document 09-001. http:www.opengis.netdocswes2.0 OpenGIS® Implementation Standard, OGC Web Services Common, Version 1.1.0, OGC document 06-121r3. http:www.opengis.netdocows1.1 OpenGIS® Best Practice, OGC® Sensor Web Enablement Architecture, Version 0.4, OGC document 06-021r4. http:www.opengis.netdocswe-architecture0.4 4 Terms and definitions For the purposes of this standard, the definitions specified in Clause 4 of the OWS Common Implementation Specification [OGC 06-121r3]. In addition, the following terms and definitions apply.

4.1 Feature

Abstraction of real-world phenomena [OGC 10-004r3ISO 19156]. 2 Equivalent to: OpenGIS® Geography Markup Language GML Encoding Standard, Geography Markup Language, Version 3.2.1, OGC document 07-036. http:www.opengis.netdocgml3.2.1 3 Equivalent to: OpenGIS Filter Encoding 2.0 Encoding Standard. Version 2.0.0. OGC document 09-026r1. 4 Equivalent to: OGC Abstract Specification Topic 20 - Geographic Information: Observations and Measurements. Version 2.0.0. OGC document 10-004r3. http:www.opengis.netdocom2.0 Copyright © 2012 Open Geospatial Consortium. 5

4.2 Measurement

Set of operations having the object of determining the value of a quantity [OGC 10-004r3ISO 19156].

4.3 Observed Property

Facet or attribute of an object referenced by a name [OGC 10-004r3ISO 19156] which is observed by a procedure.

4.4 Observation

Act of observing a property [OGC 10-004r3ISO 19156].

4.5 Observation Offering

An Observation Offering groups collections of observations produced by one procedure, e.g., a sensor system, and lists the basic metadata for the associated observations including the observed properties of the observations.

4.6 Procedure

Method, algorithm, instrument, sensor, or system of these which may be used in making an observation. [OGC 10-004r3ISO 19156] NOTE: As the definition of procedure states, this standard uses that term as a generalization of, for example, the terms sensor and sensor system, but also for simulations or other calculations that may produce observations.

4.7 Sensor

Entity that provides information about an observed property as its output. A sensor uses a combination of physical, chemical or biological means in order to estimate the underlying observed property. At the end of the measuring chain electronic devices produce signals to be processed. [OGC 06-021r4]

4.8 Sensor System

System whose components are sensors. A sensor system as a whole may itself be referred to as a sensor with an own management and sensor output interface. In addition, the components of a sensor system are individually addressable. [OGC 06-021r4] 5 Conventions

5.1 Abbreviated terms