complexType ConversionToPreferredUnitType
diagram sensorML_p1727.png
namespace http://www.opengis.net/gml/3.2
type extension of gml:UnitOfMeasureType
properties
base gml:UnitOfMeasureType
children gml:factor gml:formula
used by
elements conversionToPreferredUnit roughConversionToPreferredUnit
attributes
Name  Type  Use  Default  Fixed  annotation
uomgml:UomIdentifierrequired      
annotation
documentation
The inherited attribute uom references the preferred unit that this conversion applies to. The conversion of a unit to the preferred unit for this physical quantity type is specified by an arithmetic conversion (scaling and/or offset). The content model extends gml:UnitOfMeasureType, which has a mandatory attribute uom which identifies the preferred unit for the physical quantity type that this conversion applies to. The conversion is specified by a choice of
- gml:factor, which defines the scale factor, or
- gml:formula, which defines a formula
by which a value using the conventional unit of measure can be converted to obtain the corresponding value using the preferred unit of measure. 
The formula defines the parameters of a simple formula by which a value using the conventional unit of measure can be converted to the corresponding value using the preferred unit of measure. The formula element contains elements a, b, c and d, whose values use the XML Schema type double. These values are used in the formula y = (a + bx) / (c + dx), where x is a value using this unit, and y is the corresponding value using the base unit. The elements a and d are optional, and if values are not provided, those parameters are considered to be zero. If values are not provided for both a and d, the formula is equivalent to a fraction with numerator and denominator parameters.
source <complexType name="ConversionToPreferredUnitType">
 
<annotation>
   
<documentation>The inherited attribute uom references the preferred unit that this conversion applies to. The conversion of a unit to the preferred unit for this physical quantity type is specified by an arithmetic conversion (scaling and/or offset). The content model extends gml:UnitOfMeasureType, which has a mandatory attribute uom which identifies the preferred unit for the physical quantity type that this conversion applies to. The conversion is specified by a choice of
- gml:factor, which defines the scale factor, or
- gml:formula, which defines a formula
by which a value using the conventional unit of measure can be converted to obtain the corresponding value using the preferred unit of measure. 
The formula defines the parameters of a simple formula by which a value using the conventional unit of measure can be converted to the corresponding value using the preferred unit of measure. The formula element contains elements a, b, c and d, whose values use the XML Schema type double. These values are used in the formula y = (a + bx) / (c + dx), where x is a value using this unit, and y is the corresponding value using the base unit. The elements a and d are optional, and if values are not provided, those parameters are considered to be zero. If values are not provided for both a and d, the formula is equivalent to a fraction with numerator and denominator parameters.
</documentation>
 
</annotation>
 
<complexContent>
   
<extension base="gml:UnitOfMeasureType">
     
<choice>
       
<element name="factor" type="double"/>
       
<element name="formula" type="gml:FormulaType"/>
     
</choice>
   
</extension>
 
</complexContent>
</complexType>

element ConversionToPreferredUnitType/factor
diagram sensorML_p1728.png
namespace http://www.opengis.net/gml/3.2
type double
properties
isRef 0
content simple
source <element name="factor" type="double"/>

element ConversionToPreferredUnitType/formula
diagram sensorML_p1729.png
namespace http://www.opengis.net/gml/3.2
type gml:FormulaType
properties
isRef 0
content complex
children gml:a gml:b gml:c gml:d
used by
complexType OperationMethodType
source <element name="formula" type="gml:FormulaType"/>


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