[auscope-geosciml] Time Scale [SEC=UNCLASSIFIED]

Oliver.Raymond at ga.gov.au Oliver.Raymond at ga.gov.au
Wed Aug 11 19:34:59 EDT 2010


Hi Eric,

I can answer some of your questions quickly.

===============================================

A) what Am I suppose to do with

<gt:geochronologicEraType>
  <gt:GeochronologicEraTypeTerm/>
  </gt:geochronologicEraType>
gt:geochronologicEraType should be byReference to a vocabulary (GeochronologicEraTypeTerm) using the xlink:href-xlink:title method.  But there are no scope notes for it, and I admit that I am not sure what kind of values would be delivered in this property.  Steve, Simon, what kind of data did you intend geochronologicEraType to hold?

================================================

Did I get the encoding of the value correctly ?  I'm not sure how to encode the gml:timePosition (calendarEraName in particular).  I just put MA for now.
            <gml:TimeInstant>
                        <gml:timePosition calendarEraName="MA">850</gml:timePosition>
            </gml:TimeInstant>

Steve and I discussed this one in some emails around 27-29 July.  I think it should be something like this:
          <gml:TimeInstant>
                    <gml:timePosition frame="http://resource.geosciml.org/uri-cgi/trs/cgi/standard-geologic-time-ma">850</gml:timePosition>
          </gml:TimeInstant>

We need to build this resource registry with trs descriptions for Ma, Ga, Ka.  See attached.

================================================

Cheers,
Ollie


------------------------------------------------------------------------------------
Ollie Raymond

National Advice, Maps and Data Standards Project
Geoscience Australia

GeoSciML Design Group
IUGS Commission for the Management and Application of Geoscience Information

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________________________________
From: auscope-geosciml-bounces at lists.arcs.org.au [mailto:auscope-geosciml-bounces at lists.arcs.org.au] On Behalf Of Boisvert, Eric
Sent: Thursday, 12 August 2010 4:30 AM
To: auscope-geosciml at lists.arcs.org.au
Subject: Re: [auscope-geosciml] Time Scale

oh, another thing.  I don't have an HTML version (yet). So only text/xml is available.

________________________________
De : auscope-geosciml-bounces at lists.arcs.org.au [mailto:auscope-geosciml-bounces at lists.arcs.org.au] De la part de Boisvert, Eric
Envoyé : 11 août 2010 14:21
À : auscope-geosciml at lists.arcs.org.au
Objet : [auscope-geosciml] Time Scale


Hi all.

I tested the time scale schema and implemented the URI resolution (which was the original goal).

The whole chart is here

http://ngwd-bdnes.cits.nrcan.gc.ca:8080/Reference/uri-cgi/classifierScheme/ICS/StratChart/2010

And internal reference (trs:member) are also resolvable

Eg:

http://ngwd-bdnes.cits.nrcan.gc.ca:8080/Reference/uri-cgi/classifier/ICS/StratChart/2010/PZ

This subset will only report the two boundaries that are used for this specific GeochronologicEra

An interesting side effect of the implementation is this URL

http://ngwd-bdnes.cits.nrcan.gc.ca:8080/Reference/uri-cgi/classifier/ICS/StratChart/2010/Q,PZ,CZ

Will return all Q,PZ and CZ, although I'm pretty sure it's intended to be used that way.

I do have a couple of questions about my serialization

A) what Am I suppose to do with

<gt:geochronologicEraType>
  <gt:GeochronologicEraTypeTerm/>
  </gt:geochronologicEraType>


The schema just says it's an abstract object.  Look like there is a term list missing (or should it be a CGI_Term ?)

B) If I understand correctly, all the boudary ages should be list individually at the bottom, should these NumericEraBoundary also have a full identity (URI) and be individually resolvable ?

C) Did I get the encoding of the value correctly ?  I have two examples

<gt:referencePoint>
                <gt:NumericEraBoundary gml:id="age.K2d-K2c">
                        <gml:name>K2d-K2c</gml:name>
                        <trs:position>
                                <gml:TimeInstant>
                                        <gml:timePosition calendarEraName="MA">85.8</gml:timePosition>
                                </gml:TimeInstant>
                        </trs:position>
                        <gt:status>unknown</gt:status>
                </gt:NumericEraBoundary>
        </gt:referencePoint>
        <gt:referencePoint>
                <gt:StandardGlobalNumericalAge gml:id="age.NPR2-NPR1">
                        <gml:name>NPR2-NPR1</gml:name>
                        <trs:position>
                                <gml:TimeInstant>
                                        <gml:timePosition calendarEraName="MA">850</gml:timePosition>
                                </gml:TimeInstant>
                        </trs:position>
                        <gt:status>unknown</gt:status>
                </gt:StandardGlobalNumericalAge>
        </gt:referencePoint>

I have used NumericEraBoundaries because I did not search all the detailed description for boundaries (and create GeochronologicBoundaries), but I used StandardGlobalNumericalAge when the age are defined by definition (such as Precambrian boundaries).

Did I get this correctly ?

Also, I'm not sure how to encode the gml:timePosition (calendarEraName in particular).  I just put MA for now.

D) should the  NumericEraBoundary provides all the nextEra and previousEra too ?

E) Any other comments ?

Eric

================================================================
Eric Boisvert
Spécialiste TI-GI / IT-IM specialist
Eric.Boisvert at rncan.gc.ca, 418-654-3705, facsimile/télécopieur
418-654-2615
490, rue de la Couronne, Québec (Québec), G1K 9A9
490, rue de la Couronne, Quebec, Quebec, G1K 9A9

Laboratoire de cartographie numérique et de photogrammétrie (LCNP)
Digital Cartography and Photogrammetry Laboratory (DCPL)
Commission géologique du Canada (Québec) / Geological Survey of Canada (Quebec)
Ressources naturelles Canada / Natural Resources Canada
Gouvernement du Canada / Government of Canada
http://cgc.rncan.gc.ca/org/quebec
http://cgc.rncan.gc.ca/dir/index_f.php?id=4186 / http://cgc.rncan.gc.ca/dir/index_e.php?id=4186


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