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Element Description
Note: this wiki page is a draft/ work in progress
The Spatial Information element stores information about the reference frame or system from which horizontal and vertical spatial domains are measured. The horizontal reference frame includes a fields for Geodetic Model, Geographic Coordinates, and Local Coordinates. The Vertical reference frame includes fields for altitudes (elevations) and depths.
Best Practices
Providing Spatial Information is optional, but encouraged. This element can be used to provide horizontal and/or vertical coordinate system information.
If coordinate system information is provided, then the The Spatial Coverage Type field is required . This field is used to specify whether horizontal coordinate system information, vertical coordinate system information, or both will be provided. This field is not currently controlled but there are plans to change it to a controlled vocabulary field in the future:
Spatial Coverage Type: Denotes whether the spatial coverage of the collection is horizontal, vertical, or horizontal and vertical. While this field is not yet controlled, recommend providing one of the following values for consistency: HORIZONTAL, VERTICAL, HORIZONTAL_VERTICALfor Spatial Information.
Spatial Coverage Type: Denotes the type of spatial coverage of the collection. While this field is not currently controlled, recommend providing one of the spatial coverage type enumeration values: EARTH/GLOBAL, HORIZONTAL, VERTICAL, ORBITAL, HORIZONTAL_VERTICAL, ORBITAL_VERTICAL, HORIZONTAL_ORBITAL, HORIZONTAL_VERTICAL_ORBITAL, LUNAR
Vertical Horizontal Spatial Information
The following sub-elements can be used to describe Horizontal Vertical Coordinate Systems.
There are 3 2 categories of Horizontal for Vertical Coordinate Systems including:
(1) Geodetic ModelAltitude System Definition
Altitude System Definition should be used to describe data with a vertical component that is above-ground. Sub-elements under Geodetic Model Altitude System Definition are summarized below:
- Horizontal Datum Name: The identification given to the reference system used for defining the coordinates of points.
- Ellipsoid Name: Identification given to established representation of the Earth's shape.
- Semi Major Axis: Radius of the equatorial axis of the ellipsoid.
- Denominator Of Flattening Ratio: The ratio of the Earth's major axis to the difference between the major and the minor.
(2) Geographic Coordinate System
Sub-elements under Geographic Coordinate System are summarized below:
- Geographic Coordinate Units: Units of measure used for the geodetic latitude and longitude resolution values (e.g., decimal degrees).
- Latitude Resolution: 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.
- Longitude Resolution: 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.
(3) Local Coordinate System
Sub-elements under Local Coordinate System are summarized below:
Vertical Spatial Information
The following sub-elements can be used to describe Vertical Coordinate Systems.
There are 2 categories of Vertical Coordinate Systems including:
(1) Altitude System Definition
Altitude System Definition can be used to describe data with a vertical component that is above-ground. Sub-elements under Altitude System Definition are summarized below:
- Datum Name: The identification given to the level surface taken as the surface of reference from which measurements are compared.
- Distance Units: The units in which altitude measurements are recorded.
- Encoding Method:
- Resolutions: The minimum distance possible between two adjacent values, expressed in distance units of measure for the collection.
(2) Depth System Definition
Depth System Definition can be used to describe data with a vertical component that is above-ground. Sub-elements under Altitude System Definition are summarized below:
- Datum Name: The identification given to the level surface taken as the surface of reference from which measurements are compared.
- Distance Units: The units in which measurements are recorded.
- Encoding Method:
- Resolutions: The minimum distance possible between two adjacent values, expressed in distance units of measure for the collection.
- Datum Name: The identification given to the level surface taken as the surface of reference from which measurements are compared.
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)
1 - 80 characters
1 - 80 characters
HectoPascals
Kilometers
Millibars
Fathoms
Feet
HectoPascals
Meters
Millibars
Decimal Degrees
Kilometers
Meters
Number
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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This element is categorized as highest priority when:
- The information provided is not related to the element.
- The descriptions are inaccurate for the data set.
Not applicable
This element is categorized as low priority when:
- The descriptions includes spelling or grammatical errors.
ARC Automated Rules
If novalue is provided, return is "np."- If no value is provided the return is "np".
- If a value is provided but it's not in the schema, then, the return is: "Invalid value for Spatial_Coverage_Type: [<Provided Value>]. Spatial_Coverage_Type should be chosen from the following options: (Values will be provided here)"
- If a value is correct the return is "OK"
Dialect Mappings
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DIF 9 (Note: DIF-9 is being phased out and will no longer be supported after 2018) |
- name of the vertical datum the data is encoded in. Vertical datums define a level reference surface from which vertical measurements are compared. There are many standard vertical datums. If a standard vertical datum is used, it is recommended that the EPSG vertical datum name be provided.
- Distance Units: The units in which altitude measurements are recorded. This field is controlled and must be selected from one of the following values: HectoPascals, Kilometers, Millibars
- Resolutions: The minimum distance possible between two adjacent values, expressed in distance units of measure for the collection.
(2) Depth System Definition
Depth System Definition should be used to describe data with a vertical component that is below-ground. Sub-elements under Depth System Definition are summarized below:
- Datum Name: The name of the vertical datum the data is encoded in. Vertical datums define a level reference surface from which vertical measurements are compared. There are many standard vertical datums. If a standard vertical datum is used, it is recommended that the EPSG vertical datum name be provided.
- Distance Units: The units in which depth measurements are recorded. This field is controlled and must be selected from one of the following values: Fathoms, Feet, HectoPascals, Meters, Millibars
- Resolutions: The minimum distance possible between two adjacent values, expressed in distance units of measure for the collection.
- Datum Name: The name of the vertical datum the data is encoded in. Vertical datums define a level reference surface from which vertical measurements are compared. There are many standard vertical datums. If a standard vertical datum is used, it is recommended that the EPSG vertical datum name be provided.
Element Specification
Providing Spatial Information is optional (Cardinality: 0..1)
Model | Element | Type | Usable Valid Values | Constraints | Required? | Cardinality | Notes |
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UMM-C | SpatialInformation/SpatialCoverageType | String | EARTH/GLOBAL, HORIZONTAL, VERTICAL, ORBITAL, HORIZONTAL_VERTICAL, ORBITAL_VERTICAL, HORIZONTAL_ORBITAL, HORIZONTAL_VERTICAL_ORBITAL, LUNAR | 1 - 80 characters | Yes, if applicable | 1 | |
UMM-C | SpatialInformation/VerticalCoordinateSystem/AltitudeSystemDefinition/DatumName | String | n/a | 1 - 80 characters | No | 0..1 | Recommend providing EPSG vertical datum names |
UMM-C | SpatialInformation/VerticalCoordinateSystem/AltitudeSystemDefinition/DistanceUnits | Enumeration | HectoPascals Kilometers Millibars | n/a | No | 0..1 | |
UMM-C | SpatialInformation/VerticalCoordinateSystem/AltitudeSystemDefinition/Resolutions | Number | n/a | n/a | No | 0..* | |
UMM-C | SpatialInformation/VerticalCoordinateSystem/DepthSystemDefinition/DatumName | String | n/a | 1 - 80 characters | No | 0..1 | Recommend providing EPSG vertical datum names |
UMM-C | SpatialInformation/VerticalCoordinateSystem/DepthSystemDefinition/DistanceUnits | Enumeration | Fathoms Feet HectoPascals Meters Millibars | n/a | No | 0..1 | |
UMM-C | SpatialInformation/VerticalCoordinateSystem/DepthSystemDefinition/Resolutions | Number | n/a | n/a | No | 0..* |
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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Dialect Mappings
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DIF 10Providing Spatial_Info is optional in DIF 10 (Cardinality: 0..1). Note: There are no Vertical Coordinate System fields in DIF 10 - vertical information can be provided in the Vertical_Spatial_Info element. For details on Vertical_Spatial_Info please see the Spatial Extent wiki page. DIF 10 also supports an element called Data_Resolution which does not currently map to the UMM, however, there are plans to support it in the future.
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DIF 10 Providing 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..*). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Specification | Path | Type | Constraints | Required in DIF 10? | Cardinality | Notes | DIF 10 | Spatial_Coverage/Spatial_Info/Spatial_Coverage_Type | Enumeration | Yes | 1 | DIF 10 | Spatial_Coverage/Spatial_Info/Horizontal_Coordinate_System/Geodetic_Model/Horizontal_DatumName | String | No | 0..1 | DIF 10 | Spatial_Coverage/Spatial_Info/Horizontal_Coordinate_System/Geodetic_Model/Ellipsoid_Name | String | No | 0..1 | DIF 10 | Spatial_Coverage/Spatial_Info/Horizontal_Coordinate_System/Geodetic_Model/Semi_Major_Axis | Decimal | No | 0..1 | DIF 10 | Spatial_Coverage/Spatial_Info/Horizontal_Coordinate_System/Geodetic_Model/Denominator_Of_Flattening_Ratio | Decimal | No | 0..1 | DIF 10 | Spatial_Coverage/Spatial_Info/Horizontal_Coordinate_System/Geographic_Coordinate_System/GeographicCoordinateUnits | String | No | 0..1 | DIF 10 | Spatial_Coverage/Spatial_Info/Horizontal_Coordinate_System/Geographic_Coordinate_System/LatitudeResolution | Decimal | No | 0..1 | DIF 10 | Spatial_Coverage/Spatial_Info/Horizontal_Coordinate_System/Geographic_Coordinate_System/LongitudeResolution | Decimal | No | 0..1 | DIF 10 | Spatial_Coverage/Spatial_Info/Horizontal_Coordinate_System/Local_Coordinate_System/GeoReference_Information | String | No | 0..1 | DIF 10 | Spatial_Coverage/Spatial_Info/Horizontal_Coordinate_System/Local_Coordinate_System/Description | String | No | 0..1 | DIF 10 | Data_Resolution/Latitude_Resolution | String | No | 0..1 | DIF 10 | Data_Resolution/Longitude_Resolution | String | No | 0..1 | DIF 10 | Data_Resolution/Horizontal_Resolution_Range | String | No | 0..1 | DIF 10 | Data_Resolution/Vertical_Resolution | String | No | 0..1 | DIF 10 | Data_Resolution/ Vertical_Resolution_Unit | String | No | 0..1 | DIF 10 | Data_Resolution/Vertical_Resolution_Range | String | No | 0..1 | DIF 10 | Data_Resolution/ Temporal_Resolution | String | No | 0..1 | DIF 10 | Data_Resolution/ Temporal_Resolution_Range | String | No | 0..1 | Example Mapping
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ECHO 10Providing the Spatial Info element is optional in Echo ECHO 10 (Cardinality: 0..1)
Specification |
1 | ECHO 10 | SpatialInfo/VerticalCoordinateSystem/AltitudeSystemDefinition/DatumName | String | 1 - 80 characters No | 0..1 | ECHO 10 | SpatialInfo/VerticalCoordinateSystem/AltitudeSystemDefinition/DistanceUnits | String | 1 - 80 characters No | 0..1 | ECHO 10
ECHO 10 | SpatialInfoDecimal | No | 0..* | ECHO 10 |
String | 1 - 2048 characters No | 0..1 | ECHO 10 | SpatialInfo
Decimal | No | 0..* | ECHO 10
ECHO 10 | SpatialInfo/HorizontalCoordinateSystem/GeodeticModel/DenominatorOfFlatteningRatio | Decimal | No | 0..1 | ECHO 10 | SpatialInfo/HorizontalCoordinateSystem/GeographicCoordinateSystem/GeographicCoordinateUnits | String | 1 - 80 characters No | 0..1 | ECHO 10 | SpatialInfo/HorizontalCoordinateSystem/GeographicCoordinateSystem/LatitudeResolution | Decimal | No | 0..1 | ECHO 10 | SpatialInfo/HorizontalCoordinateSystem/GeographicCoordinateSystem/LongitudeResolution | Decimal | No | 0..1 | ECHO 10 | SpatialInfo/HorizontalCoordinateSystem/LocalCoordinateSystem/Description | String | 1 - 2048 characters No | 0..1 | ECHO 10 | SpatialInfo/HorizontalCoordinateSystem/LocalCoordinateSystem/GeoReferenceInformation | String | 1 - 2048 characters No | 0..1 |
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ISO 19115-2 MENDS | N/A | N/A | N/A |
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ISO 19115-2 SMAP
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UMM Migration
Future Mappings
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ISO 19115-1
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UMM Migration
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History
UMM Versioning
Version | Date | What Changed |
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1.18.0 | 2024-03-18 | Updated Spatial Coverage Type enumeration list for 1.18.0 |
1.15.5 | 2020-12-03 | No changes were made for Spatial Information during the transition from version 1.15.4 to 1.15.5 |
1.15.4 | 2020-09-18 | No changes were made for Spatial Information during the transition from version 1.15.3 to 1.15.4 |
1.15.3 | 2020-07-01 | No changes were made for Spatial Information during the transition from version 1.15.2 to 1.15.3 |
1.15.2 | 2020-05-20 | No changes were made for Spatial Information during the transition from version 1.15.1 to 1.15.2 |
1.15.1 | 2020-03-25 | No changes were made for Spatial Information during the transition from version 1.15.0 to 1.15.1 |
1.15.0 | 2020-02-26 | No changes were made for Spatial Information during the transition from version 1.14.0 to 1.15.0 |
1.14.0 | 2019-10-21 | The Horizontal Coordinate System element and all supporting elements were either removed or renamed and moved to the SpatialExtent element. |
1.13.0 | 2019-04-11 | No changes were made for Spatial Information during the transition from version 1.12.0 to 1.13.0 |
1.12.0 | 2019-01-22 | No changes were made for Spatial |
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History
UMM Versioning
Information during the transition from version 1.11.0 to 1.12.0. | |
1.11.0 | 2018-11 |
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No changes were made for Spatial |
Information during the transition from version 1.10.0 to 1.11.0. | |
1.10.0 | 2018-05 |
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During the transition from version 1.9.0 to 1.10.0 |
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ARC Documentation
Version | Date | What Changed | Author |
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1.011/16/18 | 2019-02-15 | Recommendations/priority matrix transferred from internal ARC documentation to wiki space |