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r3 - 08 Sep 2006 - 18:46:35 - StephenLongYou are here: TWiki >  DarwinCore Web > DarwinCoreDarwinCoreDoc? > GeospatialElement

-- StephenLong - 10 Aug 2006

Geospatial Element Definitions v1.4 (2005-08-04, current)

A table containing the definitions of the elements of the geospatial data extension to the Darwin Core 2.

Description: This document is an easy-to-read (html) representation of the Geospatial extension of the Darwin Core 2 version 1.4. This schema and documentation are not yet recommended for implementation. (See remarks on the home page concerning versions of the Darwin Core 2 currently in use.)

This is not the normative representation of the draft standard. In the case of any conflict between the two representations, definitions and values in XML schema take precedence.

Status: * Ready for review, June 30, 2005. * Not for implementation. * The discussion is on-going and this documentation will continue to be updated to reflect the evolving consensus.

Submitted by: BioGeomancer Collaboration

Submission Date: 30 Jun 2005

Change log:

  • 02 Aug 2005 - wording changes in descriptions for DecimalLatitude, DecimalLongitude, and CoordinateUncertaintyInMeters (Wieczorek, per Ginzbarg).
  • 03 Sep 2005 - changed OriginalCoordinateSystem to VerbatimCoordinateSystem and wording to avoid confusion. (Wieczorek).

Element Description Can be NULL? Type Min Value Max Value Open Discussion
  Geospatial Elements          
DecimalLatitude The latitude of the location from which the organism or observation was collected, expressed in decimal degrees. Positive values are North of the Equator, negative values are South of the Equator. Yes Double -90 90  
DecimalLongitude The longitude of the location from which the organism or observation was collected, expressed in decimal degrees. Positive values are East of the Greenwich Meridian, negative values are West of the Greenwich Meridian. Yes Double -180 180  
GeodeticDatum The geodetic datum to which the latitude and longitude refer. If not known, use "not recorded". This concept should be vocabulary-controlled. Yes String      
CoordinateUncertaintyInMeters The upper limit of the distance (in meters) from the given latitude and longitude describing a circle within which the whole of the described locality lies. Leave the value empty if the uncertainty is unknown, cannot be estimated, or is not applicable (because there are no coordinates). Zero is not a valid value for this element. Yes Double >0    
VerbatimCoordinateSystem A text representation of the coordinate data (Latitude/ Longitude, UTM, TRS, etc.) from its original source. Example: "470999 1234300". Yes String      
GeoreferenceProtocol A reference to the methods used for determining the coordinates and uncertainties. Example: "http://manisnet.org/GeorefGuide.html". Yes String      
GeoreferenceSources A list of maps, gazetteers or other resources used to georeference the locality. The content of this concept is meant to be specific enough to allow anyone in the future to use the same resource to georeference the same locality. Example: "USGS 1:24000 Florence Montana Quad". Yes String      
GeoreferenceVerificationStatus A categorical description of the extent to which the georeference has been verified to represent the location where the specimen or observation was collected. This element should be vocabulary-controlled. Examples: "requires verification", "verified by collector", "verified by curator". Yes String      
GeoreferenceRemarks Comments about the spatial description determination, explaining assumptions made in addition or opposition to the those formalized in the method referred to in GeoreferenceProtocol. Yes String      

Created by admin. Last modified 2005-09-03 05:35 PM

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Use the space below to make comments about this page. -- JohnWieczorek - 24 Aug 2006
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