EngineeringDatumPropertyType ImageDatum Other concrete datums .1 EngineeringDatum

122 Copyright © 2007 Open Geospatial Consortium, Inc. All Rights Reserved. sequence element ref=gml:pixelInCell sequence extension complexContent complexType gml: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 19111:2007, B.3.5.

12.5.4.4 pixelInCell

element name=pixelInCell type=gml:CodeWithAuthorityType gml:pixelInCell is a specification of the way an image grid is associated with the image data attributes. The required codeSpace attribute shall reference a source of information specifying the values and meanings of all the allowed string values for this property.

12.5.4.5 ImageDatumPropertyType

complexType name=ImageDatumPropertyType sequence minOccurs=0 element ref=gml:ImageDatum sequence attributeGroup ref=gml:AssociationAttributeGroup complexType gml:ImageDatumPropertyType is a property type for association roles to an image datum, either referencing or containing the definition of that datum.

12.5.4.6 VerticalDatum

element name=VerticalDatum type=gml:VerticalDatumType substitutionGroup=gml:AbstractDatum complexType name=VerticalDatumType complexContent extension base=gml:AbstractDatumType complexContent complexType gml:VerticalDatum is a textual description andor 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.

12.5.4.7 VerticalDatumPropertyType

complexType name=VerticalDatumPropertyType sequence minOccurs=0 element ref=gml:VerticalDatum sequence attributeGroup ref=gml:AssociationAttributeGroup complexType gml:VerticalDatumPropertyType is property type for association roles to a vertical datum, either referencing or containing the definition of that datum. Copyright © 2007 Open Geospatial Consortium, Inc. All Rights Reserved. 123

12.5.4.8 TemporalDatum, origin

element name=TemporalDatum type=gml:TemporalDatumType substitutionGroup=gml:AbstractDatum complexType name=TemporalDatumType complexContent extension base=gml:TemporalDatumBaseType sequence element ref=gml:origin sequence extension complexContent complexType complexType name=TemporalDatumBaseType abstract=true complexContent restriction base=gml:AbstractDatumType sequence element ref=gml:metaDataProperty minOccurs=0 maxOccurs=unbounded element ref=gml:description minOccurs=0 element ref=gml:descriptionReference minOccurs=0 element ref=gml:identifier element ref=gml:name minOccurs=0 maxOccurs=unbounded element ref=gml:remarks minOccurs=0 element ref=gml:domainOfValidity minOccurs=0 element ref=gml:scope maxOccurs=unbounded sequence attribute ref=gml:id use=required restriction complexContent complexType A 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. The TemporalDatumBaseType partially defines the origin of a temporal coordinate reference system. This type restricts the AbstractDatumType to remove the anchorDefinition and realizationEpoch elements. element name=origin type=dateTime gml:origin is the date and time origin of this temporal datum. The metaDataProperty element has been deprecated, and the gml:description element has been partially deprecated.

12.5.4.9 TemporalDatumPropertyType

complexType name=TemporalDatumPropertyType sequence minOccurs=0 element ref=gml:TemporalDatum sequence attributeGroup ref=gml:AssociationAttributeGroup complexType gml:TemporalDatumPropertyType is a property type for association roles to a temporal datum, either referencing or containing the definition of that datum.