• Andy Turner's OGC TC Meeting 2007-07 Web Page

  • [An image of Andy Turner]

  • Introduction

    • This is a Web Page for organising my information about the 2007-07 OGC Technical Committee Meeting - Paris, France.
    • Contents:
      • Blog
      • Preparation
      • Action List
      • References
      • Validation and Metadata
  • Blog

    • 2007-07-11
      • Decision Support Working Group
        • Geospatial Fusion Services
          • GeoLinker progressing.
          • GeoParser and GeoCoder have been put down and documentation should be revisited.
          • There is interest in this and recognition that there will be overlap with MASS Market WG
        • Orchestra (Open Architecture and Spatial Data Infrastructure for Risk Management)
          • - ETH Zurich
          • Work openly available on Orchestra web site.
          • Map and Diagram Service
            • getLegendGraphic becomes getLayerLegend under the nomenclature of method names
            • This looks like work we should build on for some of our MoSeS portlets.
          • Abstract specifications from Orchestra are conformant with OGC and ISO.
          • SLD Extensions
            • Charts on maps
              • Orchestra adding SVG support so that any symbol can be added to a map not just a basic symbol with a well known name.
              • Chloropleth maps
                • Orchestra adding SVG support so that any type of graphic pattern can be used not just line type patterns.
              • Bounding Box (BB) input for symbolisation to give regional control for symbolisation.
                • Not sure why BB and not a geometry in general, maybe that is a further extension to consider or can be achieved with operations prior to SLD parsing.
            • SOAP messages are more practical than http get due to size of GML
            • Main implimentation integrated with Quantum GIS (QGIS)
            • Label placement algorithms in SLD and further advancements being considered
            • Is there a need for a Portrayal Working Group (that can align with an ISO Portrayal Working Group known to exist) or can these extensions be considered for inclusion in specification by existing Working Groups?
            • I wonder how Orchestra are feeding into INSPIRE.
              • http://www.eu-orchestra.org/docs/20041202%20v02%20ORCHESTRA-INSPIRE.pdf
      • MASS Market Working Group
        • Ed Parsons
        • Raj Singh
        • GeoRSS Update:
          • Adoption of lines and polygons in Google Maps and Microsoft Virtual Earth.
          • We can get GeoRSS the same as KML using the GUIs.
          • GeoRSS moving to be a GML profile but it's not there yet.
          • W3C Geo XG
            • http://www.w3.org/2005/Incubator/geo/Wiki/
            • GeoRSS translated into RDF
        • GeoJSON
          • Axis order is longitude, latitude
          • For serializing data structures that's not heavy like XML.
          • Javascript and browser is main reason for adoption
          • GeoJSON Output Format
        • MM technology of interest discussion:
          • There is a compact DHCP binary encoding for point.
          • Multiply all coordinates by 100000 and then use offsets.
          • OGF21 October Geoffrey Fox Workshop Web2.0
          • Lots of things...
        • KML
          • OWS5
          • What is the scope for KML to be?
      • Coffee Discussions
        • Andrew Woolf and ask about WMS portlet stuff. He is interested in Google Map Creator and how we're using it in MoSeS.
        • Gerald Creager (Gerry) encryption of data and MoSeS data problems. Gerry might have some solution for MoSeS to use compute on any grid irrespective of confidentiality and data confidentiality concerns.
        • Talked with Craig Lee who is involved in OGF and plans to suggest to Geoffrey Fox to invite Microsoft to present its Virtual Earth at OGF21
          • Detailed program of OGF21 not yet available online.
      • WMS WG
        • Tiling WMS
        • WSDL SOAP XSD and SLD
        • Discussion on getFeatureInfo: Do we need a simple XML schema?
    • 2007-07-12
      • GML WG
        • xlink
          • GML xlink profile (07-083):
            • Andrew Woolf
            • Providing the format of the file being pointed to in an xlink.
        • GML and KML
          • Ron Lake
          • http://www.ogleearth.com/2005/09/kml_vs_gml.html
          • http://www.ogleearth.com/2007/04/kml_metadata_ta.html
          • http://www.galdosinc.com/archives/308
          • GML is features centric.
          • KML is place centric.
          • The KML Metadata element in something like a Placemark element can contain GML to feature enrich the KML.
          • A registry of features like a geocommons then becomes...
          • This is a bit of a muddle between display geometry and representational geometry.
          • It was not envisioned or at least considered in detail the design in the formulation of GML and KML to date.
          • Metadata element offers an extension point in KML.
          • For the time being this seems like a good bridge.
        • CityGML
          • Consideration of extending the application profile to support things like modelling of noise and disaster management (specific to cities).
        • Irregular Grids
          • GridPointDescription
          • GridOrdinateDescription
          • GeneralisedRectifiedGRid
          • ISO 19111 out now:
            • Spatio-temporal framework :-)
      • EONR WG
        • WMS
        • Biodiversity Information Standards
          • GBIF
        • Discussion on the need to mix and match WFS and WCS
          • Some use cases need both coverages and features in the underlying data model.
        • BioGeoSDI
          • Javier de la Torre
          • http://omtest.cria.org.br/biogeosdi/
          • http://omtest.cria.org.br/biogeosdi/doc/report/BioGeoSDIReport.pdf
          • Very similar to the work I've done with
          • Habitat Suitability (Niche) Modelling
          • Open Modeller (OMWS)
            • Can this be implemented as a Web Processing Service (WPS)?
            • WPS as a wrapper around Grid Services
      • SWE WG
        • SOAP Asynchronous Communications in SWE
          • Alexandre Robin talking about this in SWE WG Meeting at OGC TC in Paris.
        • OGC URN
          • There is a twiki for this.
          • http://urn.opengis.net
          • http://www.opengeospatial.org/ogcna/
          • URN to URL lookup map
      • Open Architecture Board Meeting
        • OWSCommon
        • SOAP/WSDL and REST
          • What is best practice?
      • Networking
        • David Medyckyj-Scott
          • ESRC Research Resources Board may be interested in funding something on geoservices.
          • Described a Cartogram Use Case:
            • Cartograms are useful for displaying aggregate region socio-economic data where one variable should be shown proportionally to another and where this has little (or even negative) correlation with the size (usually area) of regions.
            • Algorthims for constructing cartograms often result in representations that are usually more distorted at the edge of a set of regions in terms of distance and contiguity (although this depends on the algorithm and constraints used).
            • For any selection of regions (for example a set of UK 2001 Human Population Census Output Areas intersecting a specific health authority area), there are several cartograms that can be generated.
              • Consider circular style representations then one can base the circle areas on numerous different census variables.
              • There are other non-circular style representations (e.g. space filling cartograms more continuous in coverage), and volume based surface drape style representations.
              • For each style of representation the proportions of the geometry can be achieved using different shape and contiguity constraints that grow or distort the spatial region representation iteratively by different amounts each iteration.
            • A set of different cartograms representing data from different (contiguous) regions can be aggregated together into a single graphic.
              • This can be useful as it takes some time to learn what the different parts of the cartogram are in respect of the spatial area represented.
            • There are more cartogram style representations than one would want to pregenerate and store and have readily available for a user of a particular dataset.
            • Moreover a user might want to play around until a set of cartogram fit for purpose is produced for a specific set of regions and variables.
            • This demands functionality to generate cartograms on the fly via a user friendly interface.
            • Some cache or registry of pregenerated cartograms can be kept.
            • Grid technology can be used on the back end to speed up and facilitate cartogram generation, archiving and reuse.
          • Cartograms (and general geospatial visualisation and analysis tools) were things I was trying to get James Reid to consider as part of an NCeSS Node bid... I don't know what in the end was submitted but am very keen to work on this.
        • Talked with Javier de la Torre about Biodiversity work.
        • Talked with Adrian Custer about Grids and FOSS4G in general.
          • I want to spend some time with Martin Desruisseaux tomorrow looking at .
        • Talked about house prices and mapping house price and other variables that have spatial patterns that ripple with change over time.
    • 2007-07-13
      • SWE WG
      • Universities WG
        • Charter
        • OGC Interoperability Institute
          • Mainly for providing a vision for where technology is driving society etc.
          • Additionally for facilitating the establishment of communities to undertake projects.
          • http://www.ogcii.org
          • http://portal.ogcii.org
          • Considered setting up a twiki for partner matching.
          • Meeting in Nottingham on Monday to discuss research directions and address issues of funding and engagement.
        • Ocean Science IE
          • http://www.oostethy.org
            • Also available on OGC Portal.
          • Irregular grids and netcdf.
        • Status of OGF Collaboration
          • Craig Lee - The Aerospace Corporation
          • Starting from OGF-20
          • Geospatial service architecture
          • Computational and data preservation
          • WCS-WPS
        • eContentPlus
          • Peter Baumann
          • Large Scale Semantic Interoperability for Geoservices
          • Best Practices Network
          • Express interest to Peter
      • Euope Forum
        • Design and Implementation of a Persistent Testbed of Geo Web Services
          • Mike Jackson
      • Spent some time with Martin Desruisseaux looking at Grids
        • Martin suggested some tests to compare the performance of different Grids data structures and JAI itself for convolve operations for generating the same results.
      • Closing Plenary
  • Preparation

    • Sorted flights accomodation and funding.
  • Action List

    • Claim Expenses
  • References

    • OGC Technical Committee Meeting 2007-07
    • OGC
    • Andy Turner's OGC Page
  • Validation and Metadata

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    • Version 0.1.0 of this page published on 2007-07-13.
    • Page hosted on the School of Geography webserver at the University of Leeds.
    • Copyright: Andy Turner, University of Leeds