Reducing Maintenance Complexity of User-centric Web Portrayal Services

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REDUCING MAINTENANCE COMPLEXITY OF USER-CENTRIC WEB PORTRAYAL SERVICES

Simon ThumFraunhofer-Institut für Graphische Datenverarbeitung IGDFraunhoferstraße 564283 Darmstadt

Tel +49 6151 155 – [email protected] www.igd.fraunhofer.de

An alternate approach to web-based 3D Geodata PortrayalAuthors: Simon Thum and Michel Krämer

© Fraunhofer IGD Simon Thum: Reducing Maintenance Complexity ...

Motivation Our Approach

Where it fits in Why it‘s different Specific constraints

Our Solution Characteristics

Outlook Comparison Application opportunities

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MOTIVATION

Simon Thum: Reducing Maintenance Complexity ...

City Planning Environmental Services Tourism

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Portrayal complexity


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Better matches specific user demands

Less knowledge in the client Increased ability to adapt to

acquisition idiosyncrases Heterogenous, non-othogonal

source data Does not depend on spatial or

semantic partitioning (overlap) Less/no need for preprocessing

Always up-to-date

More a-priori knowledge in the portrayal service

Less client-side control Run-time Overhead Requires known datasource-wide

identifiers

USER-CENTRIC PORTRAYAL

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DATA FLOW


Data Specialist

End-User

Source Select Display Element G. Render & Display

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A Scenario is the central unit in our approach Map to actual use cases

More technically: Coinciding portrayal requirements Defined as a set of portrayal rules and their parameters Constrain the anticipated portrayal problems we might need to solve

Enable the IR approach

SCENARIOS


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Decomposition


Portrayal Scenario

Requirements

Information Items

Information Item Representations

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Data heterogenity or „Fitness for Portrayal“


Correlate sum

Category Sufficiency Solution

0implicit

insufficient ambient knowledge

[0..1[ partially sufficient

Inference (perhaps incuding ambient knowledge)

1explicit

completely sufficient

n/a

> 1 partially sufficient

arbitration

From information item representations to an IR item

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Knowledge about data sources is shifted closer to them Client needs less knowledge Scalable way to express and solve portrayal problems

Achieved by separating the concern of heterogenity Less reliance on preprocessing

The approach has been tested at the local level but should scale nicely

Doesn‘t fit well with client-driven approaches

SUMMARY


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THANKS FOR YOUR ATTENTION!

May I answer questions?

Simon ThumFraunhofer-Institut für Graphische Datenverarbeitung IGDFraunhoferstraße 564283 Darmstadt

Tel +49 6151 155 – [email protected] www.igd.fraunhofer.de

Reducing Maintenance Complexity of User-centric Web Portrayal Services

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