gml:baseCRS

gml:baseCRS is an association role to the coordinate reference system used by this derived CRS.

Element information

Content

• Choice [0..1]
  from subst. group gml:AbstractSingleCRS
  from subst. group gml:AbstractGeneralDerivedCRS
  gml:ProjectedCRSgml:ProjectedCRS is a 2D coordinate reference system used to approximate the shape of the earth on a planar surface, but in such a way that the distortion that is inherent to the approximation is carefully controlled and known. Distortion correction is commonly applied to calculated bearings and distances to produce values that are a close match to actual field values.
  from subst. group gml:ProjectedCRS
  gmx:ML_ProjectedCRS
  gml:DerivedCRSgml:DerivedCRS is a single coordinate reference system that is defined by its coordinate conversion from another single coordinate reference system known as the base CRS. The base CRS can be a projected coordinate reference system, if this DerivedCRS is used for a georectified grid coverage as described in ISO 19123, Clause 8.
  from subst. group gml:DerivedCRS
  gmx:ML_DerivedCRS
  gml:GeodeticCRS
  from subst. group gml:GeodeticCRS
  gmx:ML_GeodeticCRS
  gml:VerticalCRSgml:VerticalCRS is a 1D coordinate reference system used for recording heights or depths. Vertical CRSs make use of the direction of gravity to define the concept of height or depth, but the relationship with gravity may not be straightforward. By implication, ellipsoidal heights (h) cannot be captured in a vertical coordinate reference system. Ellipsoidal heights cannot exist independently, but only as an inseparable part of a 3D coordinate tuple defined in a geographic 3D coordinate reference system.
  from subst. group gml:VerticalCRS
  gmx:ML_VerticalCRS
  gml:EngineeringCRSgml:EngineeringCRS is a contextually local coordinate reference system which can be divided into two broad categories: - earth-fixed systems applied to engineering activities on or near the surface of the earth; - CRSs on moving platforms such as road vehicles, vessels, aircraft, or spacecraft, see ISO 19111 8.3.
  from subst. group gml:EngineeringCRS
  gmx:ML_EngineeringCRS
  gml:ImageCRSgml:ImageCRS is an engineering coordinate reference system applied to locations in images. Image coordinate reference systems are treated as a separate sub-type because the definition of the associated image datum contains two attributes not relevant to other engineering datums.
  from subst. group gml:ImageCRS
  gmx:ML_ImageCRS
  gml:TemporalCRSgml:TemporalCRS is a 1D coordinate reference system used for the recording of time.
  from subst. group gml:TemporalCRS
  gmx:ML_TemporalCRS
  gml:GeographicCRS
  gml:GeocentricCRS

Attributes

Used in

• Type gml:DerivedCRSType (Element gml:DerivedCRS)
• Type gmx:ML_DerivedCRS_Type via extension of gml:DerivedCRSType (Element gmx:ML_DerivedCRS)

Sample instance

<gml:baseCRS>
   <gml:ProjectedCRS 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:conversion>
         <gml:Conversion gml:id="ID">...
         </gml:Conversion>
      </gml:conversion>
      <gml:baseGeodeticCRS>
         <gml:GeodeticCRS gml:id="ID">...
         </gml:GeodeticCRS>
      </gml:baseGeodeticCRS>
      <gml:cartesianCS>
         <gml:CartesianCS gml:id="ID">...
         </gml:CartesianCS>
      </gml:cartesianCS>
   </gml:ProjectedCRS>
</gml:baseCRS>