[GeoSciML] srsName, srsDimension, and GML shapes [SEC=UNCLASSIFIED]

Oliver.Raymond at ga.gov.au Oliver.Raymond at ga.gov.au
Mon Oct 22 19:33:18 EDT 2012


Hi all,

            <sams:shape>
                        <gml:CompositeCurve gml:id="DDH123.curve" srsDimension="3" srsName="http://www.opengis.net/def/crs/EPSG/0/4939">
                                    <gml:description>The 'real-world' shape of the drill hole. This is calculated from the borehole survey data.</gml:description>
                                    <gml:curveMember>
                                                <gml:LineString gml:id="DDH123.curve.segment.1" srsDimension="3" srsName="http://www.opengis.net/def/crs/EPSG/0/4939">
                                                            <gml:posList srsDimension="3" srsName="http://www.opengis.net/def/crs/EPSG/0/4939">
                                                                        -25.0 119.0 210
                                                                        -25.0 119.01 177
                                                            </gml:posList>
                                                </gml:LineString>
                                    </gml:curveMember>

There are 3 places that you can encode srsName and srsDimension for a curved borehole shape - in gml:CompositeCurve, gml:LineString, and gml:posList.  Currently the GeoSciML v3.0 schematron enforces srsDimension and srsName in the top two levels in the hierarchy (ie, CompositeCurve and LineString), but not in posList.

I just would like to check in which elements srsDimension and srsName are actually required.  In two or all three elements?  In just the top element?  Is there a hard and fast encoding rule, or is there just a convention?

Cheers,
Ollie

__________________________________________________________________

Ollie Raymond
Senior Geologist  - Information Management  |  Continental Geology Section
Minerals and Natural Hazards Division  |  GEOSCIENCE AUSTRALIA

Oceania Councillor & Interoperability Working Group
IUGS Commission for the Management and Application of Geoscience Information
__________________________________________________________

Phone:  +61 2 6249 9575    Fax:  +61 2 6249 9971
Email:  Oliver.Raymond at ga.gov.au<mailto:Oliver.Raymond at ga.gov.au>    Web:  www.ga.gov.au<http://www.ga.gov.au/>
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