[OSGeodata] geodata stylesheets

[Norman Barker]

Thanks for the list, and the version numbers, if I get the WCS retrieval
fully working this way then the others will be very similar.


The Sensor Observation Service would be interesting in terms of
generating GeoRSS, and there are a couple flying around at the moment
(MapServer has support).

I have concerns about how much useful metadata you can retrieve from a
getcapabilities call, the time period is important, and also since most
getcapabilites are dynamic should you just fetch every time - or say
file size (as determined by an http head request) is an indicator of
whether to fetch?

I have copied the concerning bits from the stylesheet here but they
relate to populating the database schema

    <!-- boolean ok for classifying type? -->
    <entry key="raster">1</entry>
    <entry key="vector">0</entry>
    <entry key="point">0</entry>
    <!-- evaluate bbox, so not just to get -180,-90,180,90 from lazy
admins-->
    <xsl:call-template name="bbox">
        <xsl:with-param name="list" select="//wcs:lonLatEnvelope"/>
    </xsl:call-template>
    
    <!-- what value should we put in here? -->
    <entry name="date"><xsl:value-of select="date:date-time()"/></entry>
    <!-- need to a describeCoverage here, but this could be different
for every coverage offering brief and we are only storing
capabilities-->
    <entry name="timePeriod"></entry>
    <!-- CRS ref is forced to epsg:4326 -->
    <entry name="projRef">EPSG:4326</entry>
    <entry name="dataSource">WCS</entry>

Thanks,

Norman

-----Original Message-----
From: Kralidis,Tom [Burlington] [mailto:Tom.Kralidis at ec.gc.ca] 
Sent: Thursday, August 03, 2006 3:54 PM
To: geodata at geodata.osgeo.org
Subject: RE: [OSGeodata] geodata stylesheets


This is quite nice!

If we assume all of metadata will be encoded in XML, we should probably
list what XSLT's we need, a few off the top of my head:

OGC:WMS 1.1.1
OGC:WFS 1.0.0
OGC:WCS 1.0.0
FGDC:CSDGM-1998
ISO19115
ISO19119
OGC:OWSCommon
GeoRSS


Any others?

..Tom


> -----Original Message-----
> From: Norman Barker [mailto:nbarker at ittvis.com] 
> Sent: 03 August, 2006 10:44 AM
> To: geodata at geodata.osgeo.org
> Subject: [OSGeodata] geodata stylesheets
> 
> Hi,
> 
> Following on from our earlier discussions I wrote a 
> stylesheet targeted towards extracting information from a 
> getcapabilities response;
> 
> I have attached the test capabilities response (just a crude 
> manufactured example), the stylesheet (you will need the 
> exslt extensions for your language (java has them already, 
> firefox will need the pure text versions), and the output (I 
> have made this Java serializable specific - doesn't have to be).
> 
> I have put comments inline in <xsl:template 
> match="wcs:Service"> in metadata_wcs_1.0.0.xsl, where I think 
> we are missing info, or have questions.  From the 
> capabilities we can't get time periods, and we struggle to 
> get some meaningful data.
> 
> Please let me have your comments, I think I am going to go 
> down the stylesheet route for extracting the data and then 
> pulling it into Java and hence in the persistence model - if 
> this isn't recommended please let me know.
> 
> Thanks,
> 
> Norman
>