diagram | ![]() |
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namespace | http://www.fixm.aero/base/4.1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
type | extension of fb:SignificantPointType | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
properties |
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children | fb:extension fb:position | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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annotation |
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source | <complexType name="DesignatedPointOrNavaidType"> <annotation> <documentation> A named significant point, being either the site of a radio navigation aid or another named geographical location, used in defining an ATS route, the flight path of an aircraft or for other navigation or ATS purposes. [FIXM] The coded designator of a navaid or designated point is not always sufficient for unambiguously referring to that feature: - The 5-letter coded designator of a waypoint is supposed to be unique world-wide (according to ICAO Annex 11), but in reality it is not. There are at least 5% duplicates/triplicates/even more… - The en-route navaids (VOR, DME, NDB) designator is supposed to be unique (according to ICAO Annex 11) within 600 NM. This means that these designators are not unique world-wide. For airport navaids, there is no limitation. The combinations of fields that would make the references unique are: - For designated points: designator + position - For navaids: designator + position + navaid service type This FIXM class adds two optional properties 'position' and 'navaidServiceType' which may be used as a complement to the 'designator' information in order to remove any ambiguity on the coded designator. </documentation> </annotation> <complexContent> <extension base="fb:SignificantPointType"> <sequence> <element name="position" type="fb:GeographicalPositionType" minOccurs="0" maxOccurs="1"> <annotation> <documentation> The values of latitude and longitude that define the position of the Designated Point or Navaid on the surface of the Earth with respect to a reference datum. [specialised from ICAO Doc 9881] This optional field may be used as a complement of the designator in order to achieve unambiguous reference to the designated point or navaid. The combinations of fields that would make the reference unique are: - For designated points: designator + position - For navaids: designator + position + navaid service type </documentation> </annotation> </element> </sequence> <attribute name="designator" type="fb:SignificantPointDesignatorType" use="optional"> <annotation> <documentation> A named significant point. </documentation> </annotation> </attribute> <attribute name="navaidServiceType" type="fb:NavaidServiceTypeType" use="optional"> <annotation> <documentation> Type of the navaid service. [AIXM 5.1] This optional field may be used as a complement of the designator in order to achieve unambiguous reference to the navaid. The combinations of fields that would make the reference unique are: - For navaids: designator + position + navaid service type </documentation> </annotation> </attribute> </extension> </complexContent> </complexType> |
type | fb:SignificantPointDesignatorType | ||||||||||||
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annotation |
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source | <attribute name="designator" type="fb:SignificantPointDesignatorType" use="optional"> <annotation> <documentation> A named significant point. </documentation> </annotation> </attribute> |
type | fb:NavaidServiceTypeType | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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annotation |
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source | <attribute name="navaidServiceType" type="fb:NavaidServiceTypeType" use="optional"> <annotation> <documentation> Type of the navaid service. [AIXM 5.1] This optional field may be used as a complement of the designator in order to achieve unambiguous reference to the navaid. The combinations of fields that would make the reference unique are: - For navaids: designator + position + navaid service type </documentation> </annotation> </attribute> |
diagram | ![]() |
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namespace | http://www.fixm.aero/base/4.1 | ||||||||||||||
type | fb:GeographicalPositionType | ||||||||||||||
properties |
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children | fb:extension fb:pos | ||||||||||||||
attributes |
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annotation |
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source | <element name="position" type="fb:GeographicalPositionType" minOccurs="0" maxOccurs="1"> <annotation> <documentation> The values of latitude and longitude that define the position of the Designated Point or Navaid on the surface of the Earth with respect to a reference datum. [specialised from ICAO Doc 9881] This optional field may be used as a complement of the designator in order to achieve unambiguous reference to the designated point or navaid. The combinations of fields that would make the reference unique are: - For designated points: designator + position - For navaids: designator + position + navaid service type </documentation> </annotation> </element> |