gmx:datum
Element information
Namespace: http://www.isotc211.org/2005/gmx
Schema document: external/ogc/iso/19139/20070417/gmx/catalogues.xsd
Type: gmx:CT_Datum_PropertyType
Properties: Local, Qualified
Content
- Choice [0..1]
- gml:GeodeticDatumgml:GeodeticDatum is a geodetic datum defines the precise location and orientation in 3-dimensional space of a defined ellipsoid (or sphere), or of a Cartesian coordinate system centered in this ellipsoid (or sphere).
- gml:EngineeringDatumgml:EngineeringDatum defines the origin of an engineering coordinate reference system, and is used in a region around that origin. This origin may be fixed with respect to the earth (such as a defined point at a construction site), or be a defined point on a moving vehicle (such as on a ship or satellite).
- gml:ImageDatumgml:ImageDatum defines the origin of an image coordinate reference system, and is used in a local context only. For an image datum, the anchor definition is usually either the centre of the image or the corner of the image. For more information, see ISO 19111 B.3.5.
- gml:VerticalDatumgml:VerticalDatum is a textual description and/or a set of parameters identifying a particular reference level surface used as a zero-height surface, including its position with respect to the Earth for any of the height types recognized by this International Standard.
- gml:TemporalDatumA gml:TemporalDatum defines the origin of a Temporal Reference System. This type omits the "anchorDefinition" and "realizationEpoch" elements and adds the "origin" element with the dateTime type.
from subst. group gml:AbstractDatumfrom subst. group gml:GeodeticDatumfrom subst. group gml:EngineeringDatumfrom subst. group gml:ImageDatumfrom subst. group gml:VerticalDatumfrom subst. group gml:TemporalDatum
Attributes
| Name | Occ | Type | Description | Notes |
|---|---|---|---|---|
| xlink:type | [0..1] | xsd:string | Fixed value is "simple". from group xlink:simpleLink | |
| xlink:href | [0..1] | xsd:anyURI | from group xlink:simpleLink | |
| xlink:role | [0..1] | xsd:anyURI | from group xlink:simpleLink | |
| xlink:arcrole | [0..1] | xsd:anyURI | from group xlink:simpleLink | |
| xlink:title | [0..1] | xsd:string | from group xlink:simpleLink | |
| xlink:show | [0..1] | Anonymous | The 'show' attribute is used to communicate the desired presentation of the ending resource on traversal from the starting resource; it's value should be treated as follows: new - load ending resource in a new window, frame, pane, or other presentation context replace - load the resource in the same window, frame, pane, or other presentation context embed - load ending resource in place of the presentation of the starting resource other - behavior is unconstrained; examine other markup in the link for hints none - behavior is unconstrained | from group xlink:simpleLink |
| xlink:actuate | [0..1] | Anonymous | The 'actuate' attribute is used to communicate the desired timing of traversal from the starting resource to the ending resource; it's value should be treated as follows: onLoad - traverse to the ending resource immediately on loading the starting resource onRequest - traverse from the starting resource to the ending resource only on a post-loading event triggered for this purpose other - behavior is unconstrained; examine other markup in link for hints none - behavior is unconstrained | from group xlink:simpleLink |
| uuidref | [0..1] | xsd:string | from group gco:ObjectReference | |
| gco:nilReason | [0..1] | gml:NilReasonType |
Used in
- Type gmx:CT_CrsCatalogue_Type (Element gmx:CT_CrsCatalogue)
Sample instance
<gmx:datum> <gml:GeodeticDatum gml:id="ID"> <gml:metaDataProperty> <gml:GenericMetaData>Any text, intermingled with: <!--any element--> </gml:GenericMetaData> </gml:metaDataProperty> <gml:description>string</gml:description> <gml:descriptionReference/> <gml:identifier codeSpace="http://www.example.com/">string</gml:identifier> <gml:name>string</gml:name> <gml:remarks>string</gml:remarks> <gml:domainOfValidity> <gmd:EX_Extent>............ </gmd:EX_Extent> </gml:domainOfValidity> <gml:scope>string</gml:scope> <gml:anchorDefinition>string</gml:anchorDefinition> <gml:realizationEpoch>2000-01-01</gml:realizationEpoch> <gml:primeMeridian> <gml:PrimeMeridian gml:id="ID">... </gml:PrimeMeridian> </gml:primeMeridian> <gml:ellipsoid> <gml:Ellipsoid gml:id="ID">... </gml:Ellipsoid> </gml:ellipsoid> </gml:GeodeticDatum> </gmx:datum>