SDI from a technological perspective Architecture Arnold Bregt

SDI from a technological perspective: Architecture Arnold Bregt

Do you know this building? 1

Architecture design 2

Construction 3

Building regulations and standards 4

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

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

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

Client-server Architecture 8

Example e-mail 9

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

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. (note link with CAS) 12

Components (Béjar et al. 2009) n Components types (properties) n Connector Types n Constraints (we will not use it in this week) 13

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

Example: Geospatial portal OGC 15

Example: EO data 16

Example: Cyberinfrastructure 17

Example: SDI Galicia 18

Example: North Rhine-Westphalia 19

Example: Geo. Foss 20

SDI Architecture INPRIRE 21

Other examples of Architecture 22

Software support for SDI n Geonetwork n Easy. SDI 23

Easy SDI Architecture 24

Case of the week n Your SDI as a technological infrastructure” n Please analyze the technological aspects of your case SDI. Concentrate on ICT architecture (SOA), standards and services used in your SDI case. 25

Case of the week n With analyse we mean: l l l 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). 26

Case of the week n Create a Table with standards and software tools used for your SDI. Standards (abbreviation) Description Version(s) . . Software tools. . . . 27

Case of the week n TIP 1: Study the paper of Béjar et al. , 2009 n TIP 2: Use OGC and ISO as a reference source for standards (ISO) and standards and software tools (OGC). 28

n Questions? 29

UML n UML: Unified Modeling Language n 2000 ISO Standard n Describe states and processes n Use for describing GI standards. 30

UML 31

Web Coverage service (WCS) n Technically, WCS Core establishes three request types, inline with the OGC Web Service definition: l l l Get. Capabilities: delivers an XML-encoded description of service properties and the data holdings offered by the server inquired. Describe. Coverage: delivers XML-encoded descriptions of coverages (such as their location in space and time). Get. Coverage: delivers a coverage (or part thereof), either as original data or processed, in some suitable data format. 32

XML Aspects n Extensible Markup Language (XML) n Human and Machine readable n Very popular Example 33