1 teco-wis, 6-8 november 2006 technical conference on the wmo information system seoul, republic of...
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1TECO-WIS, 6-8 November 2006
TECHNICAL CONFERENCE ON THE WMO INFORMATION SYSTEMSeoul, Republic of Korea, 6-8 November 2006
ISO 191xx series of geographic information standards
(Pierre Kerhervé, WMO secretariat)
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Contents
• Presentation of ISO TC-211
• Generalities on ISO 191xx
• Reference models for ISO 191xx
• Application of ISO 191xx to WIS
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ISO TC 211
The ISO 191xx series are developed by the ISO Technical Committee 211 including– 29 participating countries– 31 observing countries– Liaisons with 26 organizations (OGC,
CEOS, FAO, ICAO, IHB, WMO,etc.)
http://www.isotc211.org/
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Generalities - ISO 19101 - Concepts
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Generalities
• A main goal of the ISO 191xx series is to facilitate the interoperability of geographic information systems– i.e. ability to discover, access, understand
and use the information and tools, independently from the platform supporting them
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Generalities
• Structured set of standards specifying methods, tools and services for the management of geographic information, including:
– Definition of data,
– Access to data
– Presentation of data
– Transfer between users
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List of ISO 191xx
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Generalities - Profiles
• Profiles: subset of one or several of the ISO 191xx standards
• ISO 19106 describes the procedures for the development of profiles and their registrations
• Extensions to the standards may be allowed
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Application Model
Represents
Represents
Represents
Refers to
Provides type definitions for features and their properties
Application schemaFeature catalogue
Metadata schema
Spatial schema
Temporal schema
Other schemas
Meta-Model
Conceptual schema language (UML)
RepresentsGeneral feature
model
Expressed in
Defines content of
Data LevelConforms to
DescribesMetadata dataset Dataset
Conceptual Schema Modelling Facilities (CSMF)
Meta-Meta-Model Modeling concepts(defining schemas)
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Domain reference model - feature
• Abstraction of real world phenomena or everything with a name part of the information system– Feature types, e.g. observation, forecast,
station, NMHS• Feature attributes, e.g. location of a station• Feature associations, e.g a station is operated by
an NMHS, observations are made at a station• Feature operations: to open a station
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Represents
Domain reference model - feature
• General Feature Model (ISO 19109) is meta-model for feature catalogues (ISO 19110) including the definition and description of feature types, attributes, associations and operations
Meta-Model Level
Feature catalogue
General feature model
Application Model Level
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Domain reference model - feature
• Methodology (ISO 19126) for creating feature registers (ISO 19135)
• Guide for different information communities to share/develop compatible feature information registers with cross-referencing
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Domain reference model - Application Schema
• Formal description of the data structure and content of the dataset (ISO 19109)
Data Level
Defines content of
Dataset
Application schema
Application Model Level
Spatial schema Temporal schema
Other schemas
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Domain reference model - metadata
• Metadata are data about a dataset
• Metadata schema (ISO 19115) presented in UML and XML (ISO 19139)
Data LevelConforms to
DescribesMetadata dataset Dataset
Application Model LevelMetadata schema
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Relationship between features, metadata and
data within the ISO CSMF
Represents
Represents
Refers to
Data Level
Meta-Model Level
Contains
Conforms to
Describes
Represents
Represents
Provides type definitions for features and their properties
Defines content of
Conceptual schema language
Metadata dataset Dataset
Application schemaFeature catalogue
General feature model
Application Model Level
Feature instances
Metadata schema
Spatial schema
Temporal schema
Other schemas
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Data product specification- ISO 19131
Data product specificationspecifies
Data product
Dataset
Metadata
Described as
Implemented as
Application schemaFeature catalogue
Metadata schema
Spatial schema
Temporal schema
Other schemas
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Architectural reference model
• The Architectural reference model (ISO 19101) describes the general types of services that will be provided by computer systems to manipulate geographic information and enumerates the service interfaces across which those services must interoperate (ISO 19116, 19117, 19118, 19119).
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API
Geographic Information Services
HS MS CS
Information Technology Services
HS MS CS
Architecture reference model
GIS applications
NNI
ISIHTI CSIInterfacesAPI : Application Programming InterfaceHTI: Human Technology interfaceISI: Information Services InterfaceCSI: Communication Services InterfaceNNI: Network to Network Interface
ServicesMS: Model Management Services -19119HS: Human Interaction Services - 19117WS: Workflow/Task Services - 19119SS: System Management Services- 19119PS: Processing Services - 19116CS: Communication Services - 19118
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Architectural reference model
• Example of Communication services (CS): encoding service – ISO 19118 specifies the encoding rules that
shall be used for data interchange purposes– Based on XML
Application schema
Data structure schema
Encoding service
i d
Schema
Instances
Input Output
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Application of ISO 191xx to WIS
• The WMO core metadata profile is based on several standards of the ISO 191xx series
• The further application of other standards of the ISO 191xx series has the potential to improve the interoperability of WIS with other GISs
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Application of ISO 191xx to WIS
• CBS tasked the IPET-MI to further study the use of ISO 191xx series for WIS
• The work programme of the IPET-MI includes– study of the relevance of each standard of
the ISO 19xxx series to WIS– development of feature catalogues