8th ICA WORKSHOP on Generalisation and Multiple Representation, A Coruña, July 7-8th, 2005

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Web Services for an

Open Generalisation Research Platform

Moritz Neun and Dirk Burghardt

8th ICA WORKSHOP on Generalisation and Multiple Representation, A Coruña, July 7-8th, 2005

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Summary

1. Classification of Generalisation Services

2. Web Services for Generalisation

• Middleware Scenarios

• Generalisation Platform

3. Registry for Generalisation Services

4. Deployment as Plug-In for Desktop GIS

8th ICA WORKSHOP on Generalisation and Multiple Representation, A Coruña, July 7-8th, 2005

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1. Classification of Generalisation Services

8th ICA WORKSHOP on Generalisation and Multiple Representation, A Coruña, July 7-8th, 2005

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Categories for Generalisation Services

1. Generalisation support service

buffering CDT - Constraint delaunay triangulation

skeleton

8th ICA WORKSHOP on Generalisation and Multiple Representation, A Coruña, July 7-8th, 2005

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Categories for Generalisation Services

1. Generalisation support service 2. Generalisation operator services

• classification

• simplification

• collapse

• enhancement

• selection / elimination

• displacement

• aggregation

8th ICA WORKSHOP on Generalisation and Multiple Representation, A Coruña, July 7-8th, 2005

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Categories for Generalisation Services

1. Generalisation support service

2. Generalisation operator services

3. Generalisation process services

• for automated orchestration

• for evaluation of generalisation results

8th ICA WORKSHOP on Generalisation and Multiple Representation, A Coruña, July 7-8th, 2005

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Service Category Interrelations

8th ICA WORKSHOP on Generalisation and Multiple Representation, A Coruña, July 7-8th, 2005

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2. Web Services for Generalisation

8th ICA WORKSHOP on Generalisation and Multiple Representation, A Coruña, July 7-8th, 2005

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Web Services?

Web Services allow interoperable machine-to-machine interaction over a network what HTML-pages for humans are the web services for the machines, therefore they communicate with XML via web protocols and their interfaces are described in a machine processable XML format

Characteristics:• service oriented architecture (request/response/exception)• n-tier distribution (layered architecture)• component architecture (generic interfaces)• platform independence (web protocols/XML)

8th ICA WORKSHOP on Generalisation and Multiple Representation, A Coruña, July 7-8th, 2005

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• clustering allows real time typification of symbolized foreground objects (e.g. points of interest)

• applications - adaptive zooming for web mapping- dynamic mapping for mobile applications

• limits: only applicable for simple generalisation operations

• standalone generalisation services• interactive solution, generalisation service as toolbox• practicable for complex generalisation

Application scenarios

Web Feature Service

Middleware solution

Generalisation Service

Web Map Service

GEO Database

http://

GIS Client / BrowserGeneralisation platform

GIS, map production Generalisation Service

8th ICA WORKSHOP on Generalisation and Multiple Representation, A Coruña, July 7-8th, 2005

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Benefits

map production• possibility to offer generalisation solutions as new business

model (rent CPU time)• customers can keep their production lines

open research platform for generalisation• allows techniques and code to be shared• supports benchmarks and comparison of different

implementation• complex generalisation task like orchestration of generalisation

operators can be addressed

8th ICA WORKSHOP on Generalisation and Multiple Representation, A Coruña, July 7-8th, 2005

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3. Registry for Generalisation Services

8th ICA WORKSHOP on Generalisation and Multiple Representation, A Coruña, July 7-8th, 2005

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Registry for Generalisation Services

8th ICA WORKSHOP on Generalisation and Multiple Representation, A Coruña, July 7-8th, 2005

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Generic XML Interface Description

8th ICA WORKSHOP on Generalisation and Multiple Representation, A Coruña, July 7-8th, 2005

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Process Communication

8th ICA WORKSHOP on Generalisation and Multiple Representation, A Coruña, July 7-8th, 2005

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4. Deployment as Plug-In for Desktop GIS

8th ICA WORKSHOP on Generalisation and Multiple Representation, A Coruña, July 7-8th, 2005

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JUMP Plug-In Example

8th ICA WORKSHOP on Generalisation and Multiple Representation, A Coruña, July 7-8th, 2005

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JUMP Plug-In Example

8th ICA WORKSHOP on Generalisation and Multiple Representation, A Coruña, July 7-8th, 2005

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Thanks for your attention!

Any questions, suggestions or comments?