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units The units attribute defines the units of measure in which numerical values are displayed in a visual element. Its value should be in the form of a four-character unit descriptor.

Supporting Tags The units attribute is currently supported by the <axis>, <centerPosition>, <centerSite>, and <data> tags. All of these tags allow the units attribute to be omitted. In this case, the default units are determined by the tag, but they will generally be the same as the units in which the parameter was originally measured by its observation network. If the data in question represent a parameter that is undefined for the observation network, the data will be considered unitless.

Examples units="fahr" <!-- degrees Fahrenheit --> units="cels" <!-- degrees Celsius --> units="mps" <!-- meters per second --> units="wpsm" <!-- Watts per square meter -->

Notes Unit descriptors are currently limited to those defined in the OCS Resources, as listed in the table below. descriptor unit name dimension nada unitless unitless kelv Kelvin temperature fahr degrees Fahrenheit temperature cels degrees Celsius temperature kelvd Kelvin temperature difference fahrd Fahrenheit degrees temperature difference celsd Celsius degrees temperature difference mbar millibar pressure inhg inches of Mercury pressure hpas hectopascals pressure kpas kilopascals pressure prct percent percentage dcml decimal percentage mps meters per second velocity mph miles per hour velocity knot knots velocity mm millimeters length cm centimeters length inch inches length degr degrees length rad radians length foot feet length m meters length km kilometers length mile miles length nmi nautical miles length wpsm Watts per square meter irradiance gpkg grams per kilogram ratio secs seconds time min minutes time hour hours time day days time fort fortnights time volt volts electric potential mV millivolts electric potential dBZ dBZ reflectivity kgm2 kilograms per square meter mass per unit area

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