Arnold Bregt SDI from a technological perspective: Architecture

Do you know this building? 1

Architecture design 2

Construction 3

Building regulations and standards 4

Content Architecture for buildings Design Components Standards Architecture for SDI Overall design Components Standards 5

Comparison bestween buildings and SDI’s Design for Building to Construct using Material and Methods Constrained by Standards Design for SDI to Implement using Software tools based on Standards 6

IT Architectures Service Oriented Architecture (SOA) Client-Sever Architecture 7

Client-server Architecture 8

Example 9

Service Oriented Arichtecture Geoportal webapplication Catalog service Search mechanism Source database Metadata editor Services Internet explorer GIS software

Example: Cheaptickets 11

SDI Architecture Definition: Structure of the system, which is formed by its components, their properties and the relationships and the interaction with the environment. 12

Components (Béjar et al. 2009) Components types (properties) Connector Types Constraints 13

How to describe an Architecture? It is free,but: Try to be consistent and clear Look at good examples (e.g. UML) It must communicate the message 14

Example: Geospatial portal OGC 15

Example: SDI Galicia 16

Example: North Rhine-Westphalia 17

Example: GeoFoss 18

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SDI Architecture INPRIRE 20

Software support for SDI Con Terra - SDI suiteSDI suite Geonetwork 21

Case of the week Your SDI as a technological infrastructure” Please analyze the technological aspects of your case SDI. Concentrate on ICT architecture (SOA), standards and services used in your SDI case. 22

Case of the week With analyse we mean: 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). 23

Case of the week Create a Create a Table with standards and software tools used for your SDI. 24 Standards (abbreviation) DescriptionVersion(s).... Software tools

Case of the week TIP 1: Study the paper of Béjar et al., 2009 TIP 2: Use OGC and ISO as a reference source for standards (ISO) and standards and software tools (OGC). 25

Questions? 26

UML UML: Unified Modeling Language 2000 ISO Standard Describe states and processes Use for describing GI standards. 27

UML 28

Web Coverage service (WCS) Technically, WCS Core establishes three request types, inline with the OGC Web Service definition: 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. 29

XML Aspects Extensible Markup Language (XML) Human and Machine readable Very popular Example 30