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4.7 hydrography
science dealing with the description and measurement of open bodies of water. [WMO1992]
NOTE: In this context, hydrography refers to the description of water bodies. Its measurement in terms of surveying, e.g. for navigational purposes, is not in the concern of the HY-Features model.
4.8 hydrologic feature
abstract notion of the hydrology phenomenon.
4.9 hydrology
science that deals with the waters above and below the land surfaces of the Earth, their occurrence, circulation and distribution, both in time and space, their biological, chemical
and physical properties, their reaction with their environment, including their relation to living beings.
[WMO1992]
4.10 hydrometric feature
real-world phenomenon which forms part of a hydrometric network.
NOTE: The hydrometric feature refers to a physical structure intended to observe properties of a hydrologic feature. Used to sample a hydrologic feature, a hydrometric feature may be considered a
sampling feature of observation. A sampling feature is described in general in ISO 19156, the special monitoring point of hydrologic observation is described in the WaterML 2.0 Specification.
4.11 hydrometry
science of the measurement and analysis of water including methods, techniques and instrumentation used in hydrology.
[WMO1992]
4.12 mapping
mapping of elements of disparate representations of a hydrologic feature.
NOTE: In the context of common semantics, it refers to concept mapping particularly to an agreed reference concept.
4.13 multilingual keyword
keyword used in a multilingual context.
NOTE: A keyword is generally described in ISO 19115.
4.14 named feature
feature identified by a name.
NOTE: Hydrologic features and their real-world representations have names within common experience, but may have different names in their cultural, political and historical contexts.
4.15 observable property
characteristic of a phenomenon subject to observation. [ISO 19156]
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NOTE: The observable property may be indirect, relying on direct observation of a more convenient parameter [observed property], which is a proxy for the ultimate [observable] property of interest.
4.16 representation