CartoService: A Web Service Framework for Quality On-Demand Geovisualisation
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CartoService: A Web Service Framework for Quality On-Demand Geovisualisation

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CartoService: A Web Service Framework for Quality On-Demand Geovisualisation
Rita Engemaier, Hartmut Asche - Department of Geography, University of Potsdam

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  • 1. CartoService – A Web Service Framework for Quality On-Demand Geovisualisation
    Rita Engemaier & HartmutAsche
    Geoinformation Research GroupGeography Department, University of Potsdam
  • 2. Outline
    Introduction & Objectives
    Cartographic modelling process
    CartoService approach
    Conclusion
  • 3. 1 Introduction
  • 4. 1 Introduction Background
    background
    steady increase in spatial data, tool availability & accessibility data bases, analysis & processing tools (GIS)
    based on the fundament of rapid development of information & communication technology (ICT)SOA, Web-GIS, crowd sourcing, cloud & GRID computation
    visible effects
    grown demand for mapping applications in and outside the internetGoogleMaps|Earth, GeoCaching, GeoTagging, car navigation ...
    changing roles in the provider-user relation & data aquisitionOpenStreetMap, Free & Open Source (Web) GIS & processing tools
    from monolithic software to interoperable software components and services
  • 5. 1 Introduction Web-based Geovisualisation & Maps
    the digital environment of recent ICT extends the traditional static 2D map by multidimensional and multivariate representations (views|displays)
    traditionally the communication of geospatial information is/was the domain of cartography and maps
    BUT: only a small amount of the long-term proven cartographic methods and expertise is yet utilised or at least visible in internet maps and mapping applications
    GeoVis
    Dynamic multidimensional representations (views)
    DB
    3D
    4D
    VR
    PCP
    ...
    Static2D
  • 6. 1 Introduction Motivation & Objectives
    in comparison to traditional derived thematic maps (2D-static) follow aspects can be recognised
    from the number of 10 to 12 traditional, static map types only a few are typically used for web-based representations
    the cartographic quality (including effectiveness & expressiveness) of web-maps is often poor
    the lack of graphical quality cannot be bypassed by interaction or dynamic representation
    Objectives
    provide cartographic visualisation expertise to web-maps|users
    integrate cartographic modelling quality in web-mapping systems
  • 7. 2 Cartographic Modelling
  • 8. interaction
    2 Cartographic Modelling Communication model
    reality
    primary
    model
    - data -
    secondary
    (graphic)
    model
    - map -
    tertiary model
    - user -
    (Web)Map
    Data base
  • 9. 2 Cartographic Modelling Processing functions
    “The strength of maps is their ability to select from reality and abstract the selection via a well designed symbolization. This results in maps that are characterized by their relative emptiness, by visual hierarchy and have a particular appealing style.”(ICA, 2009. Research Agenda)
    essential functionsofthemapdesign process
    Buttenfield and Mark (1991)
  • 10. 2 Cartographic Modelling Processing functions
    purpose
    user
    reality
    data set-data model-
    map layer
    -graphic model-
    selection
    analysis & classification
    symbol-isation
    projection
    GEOM
    ATTRIB
    calculation
    GRAPH
    G
    A
  • 11. 3 CartoService Approach
  • 12. CartoService
    purpose
    interaction
    user
    reality
    data set-data model-
    map layer
    -graphic model-
    selection
    analysis & classification
    symbol-isation
    projection
    GEOM
    ATTRIB
    calculation
    GRAPH
    G
    A
    3 CartoService Approach Orchestration & Chaining
    services
    projectionweb service
    generalisationweb service
    classificationweb service
  • 13. 3 CartoService Approach Orchestration & Chaining
    GUI
    interface
    purpose
    data
    filter
    construction
    evaluation
    start
    map
    processes
    services
    projectionweb service
    generalisationweb service
    classificationweb service
  • 14. internet
    CartoService registry
    publish
    bind
    find
    describe
    provider
    client
    use
    using the publish-find-bind paradigm from SOA
    already successful used by OGCs: WMS/WFS, WPS etc.
    missing service logic and service management facilities
    3 CartoService Approach Service Binding
  • 15. metadata>>
    DB
    file
    data>>
    style & filter rules <<
    map<<
    3 CartoService Approach Implementation
  • 16. A
    B
    C
    3 CartoService Approach Processing Sequence
    DB
    file
    GUI
    purpose
    data
    filter
    construction
    evaluation
    start
    map
    D
    E
  • 17. 4 Conclusion
    web mapping is not just distributing and viewing data
    mechanisms are needed to apply same cartographic quality standards to web maps (geovisualisations) as to traditional 2D-maps
    applying SOA principles (web services) to web-based cartographic visualisation is a promising concept to improve cartographic quality of web-maps
    components and key processes of cartographic modelling are available and applicable (some already as web-services)
    providing cartographic expertise by an interoperable web-service offers possibilities not just for private users, but also to SDIs to improve the communication quality of their web-maps and to direct (transactive) evaluation of these visualisations
  • 18. Thank you for your attention!Questions, remarks and comments are very welcome.
    Rita Engemaier & HartmutAsche
    Geoinformation Research GroupGeography Department, University of Potsdam
  • 19. typical lacks of cartographic quality in web-maps
    1 Introduction Motivation & Objectives
    selection
    cartographic generalisation
    symbology + output quality