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Element Description
Note: this wiki page is a draft/ work in progress
The Spatial Representation Information element stores the reference frame or system from which horizontal and vertical spatial domains are measured. The horizontal reference frame includes a Geodetic Model, Geographic Coordinates, and Local Coordinates. The Vertical reference frame includes altitudes (elevations) and depths.
Best Practices
There are eighteen sub-elements that comprise Spatial Representation Information:
- SpatialCoverageType: Denotes whether the spatial coverage of the collection is horizontal, vertical, horizontal and vertical, orbit, or vertical and orbit.
- VerticalCoordinate System/AltitudeSystemDefinition/DatumName: The identification given to the level surface taken as the surface of reference from which measurements are compared.
- VerticalCoordinateSystem/AltitudeSystemDefinition/DistanceUnits: The units in which altitude measurements are recorded.
- VerticalCoordinateSystem/AltitudeSystemDefinition/EncodingMethod:
- VerticalCoordinateSystem/AltitudeSystemDefinition/Resolutions: The minimum distance possible between two adjacent values, expressed in distance units of measure for the collection.
- VerticalCoordinateSystem/DepthSystemDefinition/DatumName: The identification given to the level surface taken as the surface of reference from which measurements are compared.
- VerticalCoordinateSystem/DepthSystemDefinition/DistanceUnits: The units in which measurements are recorded.
- VerticalCoordinateSystem/DepthSystemDefinition/EncodingMethod:
- VerticalCoordinateSystem/DepthSystemDefinition/Resolutions: The minimum distance possible between two adjacent values, expressed in distance units of measure for the collection.
- HorizontalCoordinateSystem/GeodeticModel/HorizontalDatumName: The identification given to the reference system used for defining the coordinates of points.
- HorizontalCoordinateSystem/GeodeticModel/EllipsoidName: Identification given to established representation of the Earth's shape.
- HorizontalCoordinateSystem/GeodeticModel/SemiMajorAxis: Radius of the equatorial axis of the ellipsoid.
- HorizontalCoordinateSystem/GeodeticModel/DenominatorOfFlatteningRatio: The ratio of the Earth's major axis to the difference between the major and the minor.
- HorizontalCoordinateSystem/GeodeticModel/DenominatorOfFlatteningRatio: The ratio of the Earth's major axis to the difference between the major and the minor.
- HorizontalCoordinateSystem/GeographicCoordinateSystem/GeographicCoordinateUnits: Units of measure used for the geodetic latitude and longitude resolution values (e.g., decimal degrees).
- HorizontalCoordinateSystem/GeographicCoordinateSystem/LatitudeResolution: The minimum difference between two adjacent latitude values in the Geographic Coordinate System, expressed in Geographic Coordinate Units of measure, expressed as a two-digit decimal number, e.g., 0.01.
- HorizontalCoordinateSystem/GeographicCoordinateSystem/LongitudeResolution: The minimum difference between two adjacent longitude values in the Geographic Coordinate System, expressed in Geographic Coordinate Units of measure, expressed as a two-digit decimal number, e.g., 0.01.
- HorizontalCoordinateSystem/LocalCoordinateSystem/GeoReferenceInformation: The information provided to register the local system to the Earth (e.g. control points, satellite ephemeral data, and inertial navigation data).
- HorizontalCoordinateSystem/LocalCoordinateSystem/Description: A description of the Local Coordinate System and geo-reference information.
Examples:
SpatialCoverageType: "Horizontal"
VerticalCoordinateSystem/AltitudeSystemDefinition/DatumName: North American Vertical Datum of 1988
VerticalCoordinateSystem/AltitudeSystemDefinition/DistanceUnits: "Kilometers"
VerticalCoordinateSystem/AltitudeSystemDefinition/EncodingMethod: "Implicit coordinate"
HorizontalCoordinateSystem/LocalCoordinateSystem/GeoReferenceInformation: "Control Points"
VerticalCoordinateSystem/DepthSystemDefinition/DistanceUnits: "HectoPascals"
Element Specification
Providing the Spatial Representation Information element is optional (Cardinality: 0..1)
Model | Element | Type | Constraints | Required? | Cardinality | Notes |
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UMM-C | SpatialRepresentationInfo/SpatialCoverageType | String | 1 - 80 characters | Yes | 1 | |
UMM-C | SpatialRepresentationInfo/VerticalCoordinateSystem/AltitudeSystemDefinition/DatumName | String | 1 - 80 characters | No | 0..1 | |
UMM-C | SpatialRepresentationInfo/VerticalCoordinateSystem/AltitudeSystemDefinition/DistanceUnits | Enumeration | HectoPascals Kilometers Millibars | No | 0..1 | |
UMM-C | SpatialRepresentationInfo/VerticalCoordinateSystem/AltitudeSystemDefinition/EncodingMethod | No | 0..1 | |||
UMM-C | SpatialRepresentationInfo/VerticalCoordinateSystem/AltitudeSystemDefinition/Resolutions | Array | No | 0..* | ||
UMM-C | SpatialRepresentationInfo/VerticalCoordinateSystem/DepthSystemDefinition/DatumName | String | 1 - 80 characters | No | 0..1 | |
UMM-C | SpatialRepresentationInfo/VerticalCoordinateSystem/DepthSystemDefinition/DistanceUnits | Enumeration | Fathoms Feet HectoPascals Meters Millibars | No | 0..1 | |
UMM-C | SpatialRepresentationInfo/VerticalCoordinateSystem/DepthSystemDefinition/EncodingMethod | No | 0..1 | |||
UMM-C | SpatialRepresentationInfo/VerticalCoordinateSystem/DepthSystemDefinition/Resolutions | Array | No | 0..* | ||
UMM-C | SpatialRepresentationInfo/HorizontalCoordinateSystem/GeodeticModel/HorizontalDatumName | String | 1 - 80 characters | No | 0..1 | |
UMM-C | SpatialRepresentationInfo/HorizontalCoordinateSystem/GeodeticModel/EllipsoidName | String | 1 - 255 characters | No | 0..1 | |
UMM-C | SpatialRepresentationInfo/HorizontalCoordinateSystem/GeodeticModel/SemiMajorAxis | Number | No | 0..1 | ||
UMM-C | SpatialRepresentationInfo/HorizontalCoordinateSystem/GeodeticModel/DenominatorOfFlatteningRatio | Number | No | 0..1 | ||
UMM-C | SpatialRepresentationInfo/HorizontalCoordinateSystem/GeographicCoordinateSystem/GeographicCoordinateUnits | Enumeration | Decimal Degrees Kilometers Meters | No | 0..1 | |
UMM-C | SpatialRepresentationInfo/HorizontalCoordinateSystem/GeographicCoordinateSystem/LatitudeResolution | Number | No | 0..1 | ||
UMM-C | SpatialRepresentationInfo/HorizontalCoordinateSystem/GeographicCoordinateSystem/LongitudeResolution | Number | No | 0..1 | ||
UMM-C | SpatialRepresentationInfo/HorizontalCoordinateSystem/LocalCoordinateSystem/GeoReferenceInformation | String | 1 - 2048 characters | No | 0..1 | |
UMM-C | SpatialRepresentationInfo/HorizontalCoordinateSystem/LocalCoordinateSystem/Description | String | 1 - 2048 characters | No | 0..1 |
Metadata Validation and QA/QC
All metadata entering the CMR goes through the below process to ensure metadata quality requirements are met. All records undergo CMR validation before entering the system. The process of QA/QC is slightly different for NASA and non-NASA data providers. Non-NASA providers include interagency and international data providers and are referred to as the International Directory Network (IDN).
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Please see the expandable sections below for flowchart details.
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ARC Automated Rules
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Dialect Mappings
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DIF 9 (Note: DIF-9 is being phased out and will no longer be supported after 2018) |
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DIF 10Providing the Spatial_Coverage element is optional in DIF 10 (Cardinality: 0..1). DIF 10 also supports an element called Data_Resolution which cross-walks to Spatial Representation information when being converted from DIF 10 to the UMM. Providing the Data_Resolution element is optional (Cardinality: 0..*).
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ECHO 10Providing the Spatial Info element is optional in Echo 10 (Cardinality: 0..1)
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ISO 19115-2 MENDS
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ISO 19115-2 SMAP
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UMM Migration
UMM Version 1.9.0 | Translation Direction | UMM Version 1.10.0 |
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Future Mappings
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ISO 19115-1
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History
UMM Versioning
Version | Date | What Changed |
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1.12.0 | 01/22/2019 | No changes were made for Spatial Representation Information during the transition from version 1.11.0 to 1.12.0. |
1.11.0 | 11/28/2018 | No changes were made for Spatial Representation Information during the transition from version 1.10.0 to 1.11.0. |
1.10.0 | 05/02/2018 | During the transition from version 1.9.0 to 1.10.0, the sub element 'GeographicCoordinateUnits' was added and enumerated, the sub element 'EncodingMethod' was removed from both 'AltitudeSystemDefinitionType' and 'DepthSystemDefinitionType', and 'VerticalSystemDefinitionType' was replaced with both 'AltitudeSystemDefinitionType' and 'DepthSystemDefinitionType.' Free text strings were also changed to enumeration for the following sub elements within 'AltitudeSystemDefinitionType' and 'DepthSystemDefinitionType': 'AltitudeDistanceUnitsEnum' and 'DepthSystemDefinitionType.' |
1.9.0 |
ARC Documentation
Version | Date | What Changed | Author |
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1.0 | 11/16/18 | Recommendations/priority matrix transferred from internal ARC documentation to wiki space |