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

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

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

    • CartoService – A Web Service Framework for Quality On-Demand Geovisualisation
      Rita Engemaier & HartmutAsche
      Geoinformation Research GroupGeography Department, University of Potsdam
    • Outline
      Introduction & Objectives
      Cartographic modelling process
      CartoService approach
      Conclusion
    • 1 Introduction
    • 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
    • 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
    • 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
    • 2 Cartographic Modelling
    • interaction
      2 Cartographic Modelling Communication model
      reality
      primary
      model
      - data -
      secondary
      (graphic)
      model
      - map -
      tertiary model
      - user -
      (Web)Map
      Data base
    • 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)
    • 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
    • 3 CartoService Approach
    • 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
    • 3 CartoService Approach Orchestration & Chaining
      GUI
      interface
      purpose
      data
      filter
      construction
      evaluation
      start
      map
      processes
      services
      projectionweb service
      generalisationweb service
      classificationweb service
    • 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
    • metadata>>
      DB
      file
      data>>
      style & filter rules <<
      map<<
      3 CartoService Approach Implementation
    • A
      B
      C
      3 CartoService Approach Processing Sequence
      DB
      file
      GUI
      purpose
      data
      filter
      construction
      evaluation
      start
      map
      D
      E
    • 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
    • Thank you for your attention!Questions, remarks and comments are very welcome.
      Rita Engemaier & HartmutAsche
      Geoinformation Research GroupGeography Department, University of Potsdam
    • typical lacks of cartographic quality in web-maps
      1 Introduction Motivation & Objectives
      selection
      cartographic generalisation
      symbology + output quality