Revision as of 10:01, September 22, 2015

I need to define the spatial, temporal, and vertical extents of resources associated with my metadata.

Overview

This basic extent information supports spatial/temporal searches that are increasingly important as the number of map based search interfaces increases. Many of the attributes included in this spiral can be calculated from the data if the file is compliant with the NetCDF Climate and Forecast (CF) Metadata Convention. Describes a simple latitude, longitude, vertical and temporal bounding box. For a more detailed geospatial coverage, see the suggested geospatial attributes. Further refinement of the geospatial bounding box can be provided by using these units and resolution attributes. Many of these extent attributes are calculated using the CF-Conventions.

Implementation

Content Standard for Digital Geospatial Metadata (CSDGM)

Structure

Spatial and Vertical <pre<noinclude>><spref>

   <horizsys>
       <geograph>
           <latres>/metadata/spref/horizsys/geograph/latres</latres>
           <longres>/metadata/spref/horizsys/geograph/longres</longres>
           <geogunit>/metadata/spref/horizsys/geograph/geogunit</geogunit>
       </geograph>
       <geodetic>
           <horizdn>/metadata/spref/horizsys/geodetic/horizdn</horizdn>
           <ellips>/metadata/spref/horizsys/geodetic/ellips</ellips>
           <semiaxis>/metadata/spref/horizsys/geodetic/semiaxis</semiaxis>
           <denflat>/metadata/spref/horizsys/geodetic/denflat</denflat>
       </geodetic>
   </horizsys>
   <vertdef>
       <altsys>
           <altdatum>/metadata/spref/vertdef/altsys/altdatum</altdatum>
           <altres>/metadata/spref/vertdef/altsys/altres</altres>
           <altunits>/metadata/spref/vertdef/altsys/altunits</altunits>
           <altenc>/metadata/spref/vertdef/altsys/altenc</altenc>
       </altsys>
       <depthsys>
           <depthdn>/metadata/spref/vertdef/depthsys/depthdn</depthdn>
           <depthres>/metadata/spref/vertdef/depthsys/depthres</depthres>
           <depthdu>/metadata/spref/vertdef/depthsys/depthdu</depthdu>
           <depthem>/metadata/spref/vertdef/depthsys/depthem</depthem>
       </depthsys>
   </vertdef>

</spref>

Temporal Extent <pre<noinclude>><timeperd>

   <timeinfo>
       <rngdates>
           <begdate>/metadata/idinfo/timeperd/timeinfo/rngdates/begdate</begdate>
           <begtime>/metadata/idinfo/timeperd/timeinfo/rngdates/begtime</begtime>
           <enddate>/metadata/idinfo/timeperd/timeinfo/rngdates/enddate</enddate>
           <endtime>/metadata/idinfo/timeperd/timeinfo/rngdates/endtime</endtime>
       </rngdates>
   </timeinfo>
   <current>/metadata/idinfo/timeperd/current</current>

</timeperd>

Place and Time Keywords <pre<noinclude>> <keywords>

  <place>
    <placekt>/metadata/idinfo/keywords/place/placekt</placekt>
    <placekey>/metadata/idinfo/keywords/place/placekey</placekey>
  </place>

</keywords>

<pre<noinclude>> <keywords>

  <temporal>
    <tempkt>/metadata/idinfo/keywords/temporal/tempkt</tempkt>
    <tempkey>/metadata/idinfo/keywords/temporal/tempkey</tempkey>
  </temporal>

</keywords>

Bounding Box <pre<noinclude>> <spdom>

   <bounding>
       <westbc>metadata/idinfo/spdom/bounding/westbc</westbc>
       <eastbc>metadata/idinfo/spdom/bounding/eastbc</eastbc>
       <northbc>metadata/idinfo/spdom/bounding/northbc</northbc>
       <southbc>metadata/idinfo/spdom/bounding/southbc</southbc>
   </bounding>

</spdom>

Usage

Objective	Description	Xpath
Horizontal Extent	Location information for the data collected.	/metadata/spref/horizsys
Vertical Extent	Range of heights the data was collected in.	/metadata/spref/vertdef
Temporal Extent	The period of time the data in the resource was collected.	/metadata/idinfo/timeperd/timeinfo/rngdates/begdate And /metadata/idinfo/timeperd/timeinfo/rngdates/enddate
Place Keyword	Keyword that gives the location of the resource.	/metadata/idinfo/keywords/place
Temporal Keyword	Keyword identifies a time period related to the resource.	/metadata/idinfo/keywords/temporal

http://www.fgdc.gov/csdgmgraphical/spref.htm http://www.fgdc.gov/csdgmgraphical/ideninfo/keyword/temporal.htm http://www.fgdc.gov/csdgmgraphical/ideninfo/keyword/place.htm http://www.fgdc.gov/csdgmgraphical/sdorg.htm

Directory Interchange Format (DIF)

Structure

Bounding Box and Vertical Extent <pre<noinclude>><Spatial_Coverage>

   <Southernmost_Latitude>-90.0</Southernmost_Latitude>
   <Northernmost_Latitude>90.0</Northernmost_Latitude>
   <Westernmost_Longitude>-180.0</Westernmost_Longitude>
   <Easternmost_Longitude>180.0</Easternmost_Longitude>
   <Minimum_Altitude>0 KM</Minimum_Altitude>
   <Maximum_Altitude>33 KM</Maximum_Altitude>

</Spatial_Coverage>

Temporal Extent

<Temporal_Coverage>
    <Start_Date>/DIF/Temporal_Coverage/Start_Date</Start_Date>
    <Stop_Date>/DIF/Temporal_Coverage/Stop_Date</Stop_Date>
</Temporal_Coverage>

Paleo Temporal Extent

<Paleo_Temporal_Coverage>
    <Paleo_Start_Date>/DIF/Paleo_Temporal_Coverage/Paleo_Start_Date</Paleo_Start_Date>
    <Paleo_Stop_Date>/DIF/Paleo_Temporal_Coverage/Paleo_Stop_Date</Paleo_Stop_Date>
    <Chronostratigraphic_Unit uuid="uuid11">
        <Eon>/DIF/Paleo_Temporal_Coverage/Chronostratigraphic_Unit/Eon</Eon>
        <Era>/DIF/Paleo_Temporal_Coverage/Chronostratigraphic_Unit/Era</Era>
        <Period>/DIF/Paleo_Temporal_Coverage/Chronostratigraphic_Unit/Period</Period>
        <Epoch>/DIF/Paleo_Temporal_Coverage/Chronostratigraphic_Unit/Epoch</Epoch>
        <Stage>/DIF/Paleo_Temporal_Coverage/Chronostratigraphic_Unit/Stage</Stage>
        <Detailed_Classification>/DIF/Paleo_Temporal_Coverage/Chronostratigraphic_Unit/Detailed_Classification</Detailed_Classification>
    </Chronostratigraphic_Unit>
</Paleo_Temporal_Coverage>

Place Keywords

<Location>
    <Location_Category>/DIF/Location/Location_Category</Location_Category>
    <Location_Type>/DIF/Location/Location_Type</Location_Type>
    <Location_Subregion1>/DIF/Location/Location_Subregion1</Location_Subregion1>
    <Location_Subregion2>/DIF/Location/Location_Subregion2</Location_Subregion2>
    <Location_Subregion3>/DIF/Location/Location_Subregion3</Location_Subregion3>
    <Detailed_Location>/DIF/Location/Detailed_Location</Detailed_Location>
</Location>

Usage

EOS Clearinghouse (ECHO)

Structure

Spatial <pre<noinclude>><Spatial>

   <SpatialCoverageType>/*/Spatial/SpatialCoverageType</SpatialCoverageType>
   <HorizontalSpatialDomain>
       <ZoneIdentifier>/*/Spatial/HorizontalSpatialDomain/ZoneIdentifier</ZoneIdentifier>
       <Geometry>
           <CoordinateSystem>/*/Spatial/HorizontalSpatialDomain/Geometry/CoordinateSystem</CoordinateSystem>
           <Point>
               <PointLongitude>/*/Spatial/HorizontalSpatialDomain/Geometry/Point/PointLongitude</PointLongitude>
               <PointLatitude>/*/Spatial/HorizontalSpatialDomain/Geometry/Point/PointLatitude</PointLatitude>
           </Point>
           <BoundingRectangle>
               <WestBoundingCoordinate>/*/Spatial/HorizontalSpatialDomain/Geometry/BoundingRectangle/WestBoundingCoordinate</WestBoundingCoordinate>
               <NorthBoundingCoordinate>/*/Spatial/HorizontalSpatialDomain/Geometry/BoundingRectangle/NorthBoundingCoordinate</NorthBoundingCoordinate>
               <EastBoundingCoordinate>/*/Spatial/HorizontalSpatialDomain/Geometry/BoundingRectangle/EastBoundingCoordinate</EastBoundingCoordinate>
               <SouthBoundingCoordinate>/*/Spatial/HorizontalSpatialDomain/Geometry/BoundingRectangle/SouthBoundingCoordinate</SouthBoundingCoordinate>
               <CenterPoint>
                   <PointLongitude>/*/Spatial/HorizontalSpatialDomain/Geometry/BoundingRectangle/CenterPoint/PointLongitude</PointLongitude>
                   <PointLatitude>/*/Spatial/HorizontalSpatialDomain/Geometry/BoundingRectangle/CenterPoint/PointLatitude</PointLatitude>
               </CenterPoint>
           </BoundingRectangle>
           <GPolygon>
               <Boundary>
                   <Point>
                       <PointLongitude>/*/Spatial/HorizontalSpatialDomain/Geometry/GPolygon/Boundary/Point[1]/PointLongitude</PointLongitude>
                       <PointLatitude>/*/Spatial/HorizontalSpatialDomain/Geometry/GPolygon/Boundary/Point[1]/PointLatitude</PointLatitude>
                   </Point>
                   <Point>
                       <PointLongitude>/*/Spatial/HorizontalSpatialDomain/Geometry/GPolygon/Boundary/Point[2]/PointLongitude</PointLongitude>
                       <PointLatitude>/*/Spatial/HorizontalSpatialDomain/Geometry/GPolygon/Boundary/Point[2]/PointLatitude</PointLatitude>
                   </Point>
                   <Point>
                       <PointLongitude>/*/Spatial/HorizontalSpatialDomain/Geometry/GPolygon/Boundary/Point[3]/PointLongitude</PointLongitude>
                       <PointLatitude>/*/Spatial/HorizontalSpatialDomain/Geometry/GPolygon/Boundary/Point[3]/PointLatitude</PointLatitude>
                   </Point>
               </Boundary>
               <CenterPoint>
                   <PointLongitude>/*/Spatial/HorizontalSpatialDomain/Geometry/GPolygon/CenterPoint/PointLongitude</PointLongitude>
                   <PointLatitude>/*/Spatial/HorizontalSpatialDomain/Geometry/GPolygon/CenterPoint/PointLongitude</PointLatitude>
               </CenterPoint>
           </GPolygon>
           <Line>
               <Point>
                   <PointLongitude>40</PointLongitude>
                   <PointLatitude>50</PointLatitude>
               </Point>
               <Point>
                   <PointLongitude>60</PointLongitude>
                   <PointLatitude>70</PointLatitude>
               </Point>
           </Line>
       </Geometry>
   </HorizontalSpatialDomain>
   <VerticalSpatialDomain>
       <Type>/*/Spatial/VerticalSpatialDomain/Type</Type>
       <Value>/*/Spatial/VerticalSpatialDomain/Value</Value>
   </VerticalSpatialDomain>
   <VerticalSpatialDomain>
       <Type>/*/Spatial/VerticalSpatialDomain[2]/Type</Type>
       <Value>/*/Spatial/VerticalSpatialDomain[2]/Value</Value>
   </VerticalSpatialDomain>
   <VerticalSpatialDomain>
       <Type>Minimum Altitude</Type>
       <Value>22222</Value>
   </VerticalSpatialDomain>
   <VerticalSpatialDomain>
       <Type>Maximum Altitude</Type>
       <Value>33333</Value>
   </VerticalSpatialDomain>
   <OrbitParameters>
       <SwathWidth>/*/Spatial/OrbitParameters/SwathWidth</SwathWidth>
       <Period>/*/Spatial/OrbitParameters/Period</Period>
       <InclinationAngle>/*/Spatial/OrbitParameters/InclinationAngle</InclinationAngle>
       <NumberOfOrbits>/*/Spatial/OrbitParameters/NumberOfOrbits</NumberOfOrbits>
       <StartCircularLatitude>/*/Spatial/OrbitParameters/StartCircularLatitude</StartCircularLatitude>
   </OrbitParameters>
   <GranuleSpatialRepresentation>/*/Spatial/GranuleSpatialRepresentation</GranuleSpatialRepresentation>

</Spatial>

Temporal

<Temporal>
    <TimeType>/*/Temporal/TimeType</TimeType>
    <DateType>/*/Temporal/DateType</DateType>
    <TemporalRangeType>/*/Temporal/TemporalRangeType</TemporalRangeType>
    <PrecisionOfSeconds>/*/Temporal/PrecisionOfSeconds</PrecisionOfSeconds>
    <EndsAtPresentFlag>/*/Temporal/EndsAtPresentFlag</EndsAtPresentFlag>
    <SingleDateTime>/*/Temporal/SingleDateTime</SingleDateTime>
    <RangeDateTime>
        <BeginningDateTime>/*/Temporal/RangeDateTime/BeginningDateTime</BeginningDateTime>
        <EndingDateTime>/*/Temporal/RangeDateTime/EndingDateTime</EndingDateTime>
    </RangeDateTime>
</Temporal>

Place Keywords

<SpatialKeywords>
    <Keyword>/*/SpatialKeywords/Keyword</Keyword>
</SpatialKeywords>

Temporal Keywords

<TemporalKeywords>
    <Keyword>/*/TemporalKeywords/Keyword</Keyword>
</TemporalKeywords>

Usage

International Organization for Standardization 19115 (ISO19115)

Structure

Spatial and Temporal <pre<noinclude>> <gmd:extent>

   <gmd:EX_Extent id="boundingExtent">
       <gmd:geographicElement>
           <gmd:EX_GeographicBoundingBox id="boundingGeographicBoundingBox">
               <gmd:extentTypeCode>
                   <gco:Boolean>true</gco:Boolean>
               </gmd:extentTypeCode>
               <gmd:westBoundLongitude>
                   <gco:Decimal>-178</gco:Decimal>
               </gmd:westBoundLongitude>
               <gmd:eastBoundLongitude>
                   <gco:Decimal>180</gco:Decimal>                    
               </gmd:eastBoundLongitude>
               <gmd:southBoundLatitude>
                   <gco:Decimal>-78</gco:Decimal>
               </gmd:southBoundLatitude>
               <gmd:northBoundLatitude>
                   <gco:Decimal>75</gco:Decimal>
               </gmd:northBoundLatitude>
           </gmd:EX_GeographicBoundingBox>           
       </gmd:geographicElement>
       <gmd:geographicElement>
           <gmd:EX_GeographicDescription>
               <gmd:geographicIdentifier>
                   <gmd:MD_Identifier>
                       <gmd:authority>
                           <gmd:CI_Citation>
                               <gmd:title>
                                   <gco:CharacterString>NASA/GCMD Location Keywords</gco:CharacterString>
                               </gmd:title>
                               <gmd:date>
                                   <gmd:CI_Date>
                                       <gmd:date>
                                           <gco:Date>2009-01-01</gco:Date>
                                       </gmd:date>
                                       <gmd:dateType>
                                           <gmd:CI_DateTypeCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_DateTypeCode" codeListValue="revision">revision</gmd:CI_DateTypeCode>
                                       </gmd:dateType>
                                   </gmd:CI_Date>
                               </gmd:date>
                           </gmd:CI_Citation>
                       </gmd:authority>
                       <gmd:code>
                           <gco:CharacterString>Location > Geographic Region > Global Ocean</gco:CharacterString>
                       </gmd:code>
                   </gmd:MD_Identifier>
               </gmd:geographicIdentifier>
           </gmd:EX_GeographicDescription>
       </gmd:geographicElement>
       <gmd:temporalElement>
           <gmd:EX_TemporalExtent id="boundingTemporalExtent">
               <gmd:extent>
                   <gml:TimePeriod gml:id="someTimeID">
                       <gml:beginPosition>1846</gml:beginPosition>
                       <gml:endPosition indeterminatePosition="now"/>
                   </gml:TimePeriod>                    
               </gmd:extent>
           </gmd:EX_TemporalExtent>
       </gmd:temporalElement>
       <gmd:verticalElement>
           <gmd:EX_VerticalExtent>
             <gmd:minimumValue>
               <gco:Real>10</gco:Real>
             </gmd:minimumValue>
             <gmd:maximumValue>
               <gco:Real>2810</gco:Real>
             </gmd:maximumValue>
             <gmd:verticalCRS gco:nilReason="unknown"/>
           </gmd:EX_VerticalExtent>
         </gmd:verticalElement>
       </gmd:EX_Extent>
   </gmd:EX_Extent>

</gmd:extent>

Vertical Extent

<pre<noinclude>> <gmd:verticalElement>

<gmd:EX_VerticalExtent>
 <gmd:minimumValue>
  <gco:Real> 3600 </gco:Real>
 </gmd:minimumValue>
 <gmd:maximumValue>
  <gco:Real> 3100 </gco:Real>
 </gmd:maximumValue>
 <gmd:verticalCRS xlink:href="http://www.epsg-registry.org/export.htm?gml=urn:ogc:def:crs:EPSG::5715" xlink:title="msl depth in meters" xlink:actuate="onRequest"/>
</gmd:EX_VerticalExtent>

</gmd:verticalElement>

Usage

The ISO EX_Extent object is used to describe the spatial, temporal and vertical extent of resources, responsibilities, processing, quality reports, or maintenance.

The EX_Extent object supports multiple geographic and temporal extents within a single object. This capability is quite useful for describing datasets created from observations collected at different locations and times. For example, a dataset that includes observations collected at different locations each field season.

Bounding Extent. The ISO metadata standards allow multiple extents to be associated with a resource. This capability can be very important as spatial and temporal observatory deployments become more complex. Many metadata tools require a single bounding extent in order to support simple spatial and temporal discovery. In order to easily and unambiguously identify the bounding extent for a resource, we recommend identifying it with an xml id = 'boundingExtent'. |- | ISO 19115/*/gmd:identificationInfo/*/gmd:extent/{color:#000000}gmd:EX_Extent[[@id='boundingExtent{color:#21DA7}']]{color}{color} |- | ISO 19115-1 | //mdb:identificationInfo//mri:extent/mex:EX_Extent@id='boundingExtent'

Two-Dimensional Tiling Systems. Several NASA metadata standards include the capability to describe spatial extents of resources using two-dimensional tiling systems. The tile numbers in these systems are standard geographic identifiers that can be used to improve performance of spatial searches. MENDS recommended syntax for these tile identifiers in ISO.

Conceptual Model (UML)

ISO 19115 combines spatial and temporal extents into a single object, called an EX_Extent, that includes temporal, vertical, and geographic extents. The temporal and vertical extents are simple descriptions of temporal or vertical ranges. The geographic extent can be described in three ways.

The first option is a simple bounding box for recording the north, south, east and west bounding coordinates.

The second option generalizes the bounding box to a bounding polygon. This covers a large number of cases which might involve natural shapes, such as watersheds, or political shapes, like county forecast zones, rather than rectangles.

The final option allows specification of an identifier of a geographic region. This identifier includes a namespace and a name, and allows the use of named spatial objects, like counties, to describe spatial extents.

XML Example - Bounding Extent

This example describes a simple spatial and temporal extent for a dataset that extends to the present. It includes ids (boundingExtent, boundingBox, and boundingTime) that allow the bounding extents to be referenced from other parts of the record or from external sources. These can also be used when translating the ISO metadata to standards that include only a bounding extent. It also include a geographicIdentifier, in this case a location keyword from the NASA GCMD.

_Where are EX_Extent objects?_

Usage	Description and Xpath
Dataset or Service Extent

| The EX_Extent object in MD_DataIdentification and SV_ServiceIdentification defines extents associated with a dataset or service.

//gmd:identificationInfo//gmd:extent/gmd:EX_Extent |- | Source Extent of Process Step

| The EX_Extent object within LI_Source defines extents associated with data production sources. These sources are the inputs or outputs of data processing steps utilized to produce the data product.

/*/gmd:dataQualityInfo/gmd:DQ_DataQuality/gmd:lineage/gmd:LI_Lineage/gmd:source/gmd:LI_Source/gmd:sourceExtent/gmd:EX_Extent |- | Scope Extent

!scope.PNG! | The EX_Extent object within DQ_Scope defines extents associated with scope codes. Examples include collectionHardware, collectionSession, dataset, series, service, model, etc.

/*/gmd:dataQualityInfo/gmd:DQ_DataQuality/gmd:scope/gmd:DQ_Scope/gmd:extent/gmd:EX_Extent |- | Reference System Extent

!referenceSystem.PNG! | The EX_Extent object within RS_ReferenceSystem defines the valid range of values for the reference system.

/*/gmd:referenceSystemInfo/gmd:RS_ReferenceSystem/gmd:domainOfValidity/gmd:EX_Extent

_
_

Crosswalks

Notes

This table reflects the MENDS voting recommendations pertaining to the mapping of ECHO bounding coordinates to ISO.

ECHO Attribute	ISO Equivalent
/*/Spatial/HorizontalSpatialDomain/Geometry/BoundingRectangle/CenterPoint/PointLatitude	/gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_BoundingPolygon/gmd:polygon/gml:LineString/gml:posList
/*/Spatial/HorizontalSpatialDomain/Geometry/BoundingRectangle/CenterPoint/PointLongitude	/gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_BoundingPolygon/gmd:polygon/gml:LineString/gml:posList
/*/Spatial/HorizontalSpatialDomain/Geometry/BoundingRectangle/EastBoundingCoordinate	/gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_GeographicBoundingBox/gmd:eastBoundLongitude/gco:Decimal
/*/Spatial/HorizontalSpatialDomain/Geometry/BoundingRectangle/NorthBoundingCoordinate	/gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_GeographicBoundingBox/gmd:northBoundLatitude/gco:Decimal
/*/Spatial/HorizontalSpatialDomain/Geometry/BoundingRectangle/SouthBoundingCoordinate	/gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_GeographicBoundingBox/gmd:southBoundLatitude/gco:Decimal
/*/Spatial/HorizontalSpatialDomain/Geometry/BoundingRectangle/WestBoundingCoordinate	/gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_GeographicBoundingBox/gmd:westBoundLongitude/gco:Decimal
/*/Spatial/HorizontalSpatialDomain/Geometry/GPolygon/Boundary/Point/PointLatitude	/gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_BoundingPolygon/gmd:polygon/gml:LineString/gml:posList
/*/Spatial/HorizontalSpatialDomain/Geometry/GPolygon/Boundary/Point/PointLongitude	/gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_BoundingPolygon/gmd:polygon/gml:LineString/gml:posList
/*/Spatial/HorizontalSpatialDomain/Geometry/GPolygon/CenterPoint/PointLatitude	/gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_BoundingPolygon/gmd:polygon/gml:LineString/gml:posList
/*/Spatial/HorizontalSpatialDomain/Geometry/GPolygon/CenterPoint/PointLongitude	/gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_BoundingPolygon/gmd:polygon/gml:LineString/gml:posList
/*/Spatial/HorizontalSpatialDomain/Geometry/Line/Point/PointLatitude	/gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_GeographicBoundingBox/gmd:northBoundLatitude/gco:Decimal
/*/Spatial/HorizontalSpatialDomain/Geometry/Line/Point/PointLongitude	/gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_GeographicBoundingBox/gmd:westBoundLongitude/gco:Decimal
/*/Spatial/HorizontalSpatialDomain/Geometry/Point/PointLatitude	/gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_GeographicBoundingBox/gmd:northBoundLatitude/gco:Decimal
/*/Spatial/HorizontalSpatialDomain/Geometry/Point/PointLatitude	/gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_GeographicBoundingBox/gmd:southBoundLatitude/gco:Decimal
/*/Spatial/HorizontalSpatialDomain/Geometry/Point/PointLongitude	/gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_GeographicBoundingBox/gmd:eastBoundLongitude/gco:Decimal
/*/Spatial/HorizontalSpatialDomain/Geometry/Point/PointLongitude	/gmi:MI_Metadata/gmd:identificationInfo/gmd:MD_DataIdentification/gmd:extent/gmd:EX_Extent/gmd:geographicElement/gmd:EX_GeographicBoundingBox/gmd:westBoundLongitude/gco:Decima

Revisions

The revision of 19115 adds extents to:

CI_ResponsibleParty to describe spatial/temporal extents of responsibilities.
MD_Constraints to describe spatial/temporal extents of constraints.

ISO 19115-1 introduces the capability for data providers to document the temporal resolution of the metadata resource using an ISO 8601-compliant string.

@@ Line 80: / Line 80: @@
 ===Usage===
 <table border="1" cellpadding="6">
-<tr><th>Usage</th><th>Description</th><th>Xpath</th></tr>
+<tr><th>Objective</th><th>Description</th><th>Xpath</th></tr>
-<tr><td>Horizontal Extent</td><td></td><td>/metadata/spref/horizsys</td></tr>
+<tr><td>Horizontal Extent</td><td>Location information for the data collected.</td><td>/metadata/spref/horizsys</td></tr>
-<tr><td>Vertical Extent</td><td></td><td>/metadata/spref/vertdef</td></tr>
+<tr><td>Vertical Extent</td><td>Range of heights the data was collected in.</td><td>/metadata/spref/vertdef</td></tr>
-<tr><td>Temporal Extent</td><td></td><td>/metadata/idinfo/timeperd/timeinfo/rngdates/begdate '''And''' /metadata/idinfo/timeperd/timeinfo/rngdates/enddate</td></tr>
+<tr><td>Temporal Extent</td><td>The period of time the data in the resource was collected.</td><td>/metadata/idinfo/timeperd/timeinfo/rngdates/begdate '''And''' /metadata/idinfo/timeperd/timeinfo/rngdates/enddate</td></tr>
-<tr><td>Place Keyword</td><td></td><td>/metadata/idinfo/keywords/place</td></tr>
+<tr><td>Place Keyword</td><td>Keyword that gives the location of the resource.</td><td>/metadata/idinfo/keywords/place</td></tr>
 <tr><td>Temporal Keyword</td><td>Keyword identifies a time period related to the resource.</td><td>/metadata/idinfo/keywords/temporal</td></tr>
 </table>

Difference between revisions of "Extent Documentation"

Revision as of 10:01, September 22, 2015

Contents

Overview

Implementation

Content Standard for Digital Geospatial Metadata (CSDGM)

Structure

Usage

Directory Interchange Format (DIF)

Structure

Usage

EOS Clearinghouse (ECHO)

Structure

Usage

International Organization for Standardization 19115 (ISO19115)

Structure

Usage

Crosswalks

Notes