Transcript Professional Application Development

SDI from a technological
perspective: Architecture
Arnold Bregt
Do you know this building?
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Architecture design
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Construction
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Building regulations and standards
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Content
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Architecture for buildings
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Design
Components
Standards
Architecture for SDI
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Overall design
Components
Standards
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Comparison bestween buildings and SDI’s
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Design for Building
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using
Software tools
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to
Implement
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Constrained by
Standards
Design for SDI
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using
Material and Methods
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to
Construct
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based on
Standards
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IT Architectures
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Service Oriented Architecture (SOA)
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Client-Sever Architecture
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Client-server Architecture
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Example e-mail
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Service Oriented Arichtecture
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Internet explorer
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GIS software
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Geoportal
webapplication
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Catalog service
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Search mechanism
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Source database
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Metadata editor
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Services
Example: Cheaptickets
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SDI Architecture
Definition:
Structure of the system, which is formed by its
components, their properties and the relationships
and the interaction with the environment.
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Components (Béjar et al. 2009)
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Components types (properties)
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Connector Types
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Constraints
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How to describe an Architecture?
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It is free,but:
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Try to be consistent and clear
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Look at good examples (e.g. UML)
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It must communicate the message
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Example: Geospatial portal OGC
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Example: SDI Galicia
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Example: North Rhine-Westphalia
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Example: GeoFoss
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SDI Architecture INPRIRE
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Software support for SDI
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Con Terra - SDI suite
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Geonetwork
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Case of the week
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Your SDI as a technological infrastructure”
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Please analyze the technological aspects of your
case SDI. Concentrate on ICT architecture
(SOA), standards and services used in your SDI
case.
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Case of the week
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With analyse we mean:
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Draft an architectural picture of your SDI (design your
own picture for your own SDI);
Describe the components, standards and software
technologies used;
Reflect on the standards and technologies used (e.g.
are they using the latest versions of the standards,
what software tools are popular, etc).
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Case of the week
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Create a Create a Table with standards and
software tools used for your SDI.
Standards
(abbreviation)
Description
Version(s)
....
Software tools
.......
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Case of the week
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TIP 1: Study the paper of Béjar et al., 2009
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TIP 2: Use OGC and ISO as a reference source
for standards (ISO) and standards and software
tools (OGC).
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Questions?
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UML
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UML: Unified Modeling Language
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2000 ISO Standard
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Describe states and processes
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Use for describing GI standards.
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UML
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Web Coverage service (WCS)
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Technically, WCS Core establishes three request
types, inline with the OGC Web Service definition:
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GetCapabilities: delivers an XML-encoded description
of service properties and the data holdings offered by
the server inquired.
DescribeCoverage: delivers XML-encoded descriptions
of coverages (such as their location in space and time).
GetCoverage: delivers a coverage (or part thereof),
either as original data or processed, in some suitable
data format.
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XML
Aspects
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Extensible Markup
Language (XML)
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Human and Machine
readable
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Very popular
Example
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