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World Geodetic System 1984 Details
- Component XLINK
- World Geodetic System 1984 Relationships
- Component Type
- {http://www.isotc211.org/2005/gmd}MD_ReferenceSystem
- Component Set
- GLOBAL-CS
- Component Update Information
- Last Updater
- dgilmore
- Last Updated
- 2016-12-27 13:01:13 EST
- Date Created
- 2015-10-28 07:36:33 EDT
- More Details
- World Geodetic System 1984 Extras
- Uuid
- dc323817-d2e4-4707-9b68-003eabb43778
- Owner
- dgilmore
- Index Data
- World Geodetic System 1984
- XML Show XML
- <gmd:MD_ReferenceSystem xmlns:gmd="http://www.isotc211.org/2005/gmd" xsi:schemaLocation="http://www.isotc211.org/2005/gmd http://www.ngdc.noaa.gov/metadata/published/xsd/schema.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" uuid="dc323817-d2e4-4707-9b68-003eabb43778"> <gmd:referenceSystemIdentifier> <gmd:RS_Identifier> <gmd:authority> <gmd:CI_Citation> <gmd:title> <gco:CharacterString xmlns:gco="http://www.isotc211.org/2005/gco"> World Geodetic System 1984 </gco:CharacterString> </gmd:title> <gmd:alternateTitle> <gco:CharacterString xmlns:gco="http://www.isotc211.org/2005/gco"> WGS 84 </gco:CharacterString> </gmd:alternateTitle> <gmd:date> <gmd:CI_Date> <gmd:date> <gco:Date xmlns:gco="http://www.isotc211.org/2005/gco"> 2006-11-11 </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:citedResponsibleParty> <gmd:CI_ResponsibleParty> <gmd:organisationName gco:nilReason="withheld" xmlns:gco="http://www.isotc211.org/2005/gco"/> <gmd:contactInfo> <gmd:CI_Contact> <gmd:onlineResource> <gmd:CI_OnlineResource> <gmd:linkage> <gmd:URL> http://spatialreference.org/ref/epsg/3338/ </gmd:URL> </gmd:linkage> <gmd:name> <gco:CharacterString xmlns:gco="http://www.isotc211.org/2005/gco"> NAD83 / Alaska Albers </gco:CharacterString> </gmd:name> <gmd:description> <gco:CharacterString xmlns:gco="http://www.isotc211.org/2005/gco"> Because Earth deviates significantly from a perfect ellipsoid, the ellipsoid that best approximates its shape varies region by region across the world. Clarke 1866, and North American Datum of 1927 with it, were surveyed to best suit North America as a whole. Likewise, historically most regions of the world used ellipsoids measured locally to best suit the vagaries of earth's shape in their respective locales. While ensuring the most accuracy locally, this practice makes integrating and disseminating information across regions troublesome. As satellite geodesy and remote sensing technology reached high precision and were made available for civilian applications, it became feasible to acquire information referred to a single global ellipsoid. This is because satellites naturally deal with Earth as a monolithic body. Therefore the GRS 80 ellipsoid was developed for best approximating the earth as a whole, and it became the foundation for the North American Datum of 1983. Though generally GRS 80 and its close relative WGS 84 are not the best fit for any given region, a need for the closest fit largely evaporates when a global survey is combined with computers, databases, and software able to compensate for local conditions. </gco:CharacterString> </gmd:description> <gmd:function> <gmd:CI_OnLineFunctionCode codeList="http://www.ngdc.noaa.gov/metadata/published/xsd/schema/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode" codeListValue="information"> information </gmd:CI_OnLineFunctionCode> </gmd:function> </gmd:CI_OnlineResource> </gmd:onlineResource> </gmd:CI_Contact> </gmd:contactInfo> <gmd:role> <gmd:CI_RoleCode codeList="http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_RoleCode" codeListValue="resourceProvider"> resourceProvider </gmd:CI_RoleCode> </gmd:role> </gmd:CI_ResponsibleParty> </gmd:citedResponsibleParty> <gmd:citedResponsibleParty xlink:href="https://www.ngdc.noaa.gov/docucomp/68498237-c535-48dd-a292-17c2fc36cb97" xmlns:xlink="http://www.w3.org/1999/xlink" xlink:title="EPSG Registry"/> </gmd:CI_Citation> </gmd:authority> <gmd:code> <gco:CharacterString xmlns:gco="http://www.isotc211.org/2005/gco"> urn:ogc:def:crs:EPSG::3338 </gco:CharacterString> </gmd:code> </gmd:RS_Identifier> </gmd:referenceSystemIdentifier> </gmd:MD_ReferenceSystem>