SDI from a technological perspective: Metadata

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Presentation transcript:

SDI from a technological perspective: Metadata Arnold Bregt

Components People Technology Policies Standards Spatial Data

Centrum voor Geo-informatie Experiment Centrum voor Geo-informatie

Centrum voor Geo-informatie Stsul.dat 0 0 20 1 0 15 5 0 35 10 0 45 75 0 30 . . . Centrum voor Geo-informatie

Depth to the pyritic layer

Why describe spatial datasets? Manage (storage and change) Search (content global ) Exchange (format ) Use (content details, quality) Centrum voor Geo-informatie

Centrum voor Geo-informatie Target groups Personal (storage) Own organisation (storage and content) Other organisations (content, format, quality, contact person) Centrum voor Geo-informatie

Centrum voor Geo-informatie Extent description Target groups Functions Manage Search Exchange Useuse Personal + + - - Own organisation ++ ++ ++ ++ Other organisation - +++ +++ +++ Centrum voor Geo-informatie

Centrum voor Geo-informatie How to describe ? Personal standard Organisational standard (inter)national standards Centrum voor Geo-informatie

Exercise Draft your own Metadata Standard

International standards America (FGDC) Europe (CEN) ISO (ISO19115) Centrum voor Geo-informatie

Metadata Standards There are many

Metadata standards

Standards for Meta-data Centrum voor Geo-informatie

Metadata Standards But the leading one is ISO 19115

Metadata INSPIRE Metadata INSPIRE

Metadata Standards Profiles

Metadata implemantation Profiles from ISO 19115 Implementation schema in XML (ISO 19139) Software support (e.g. Geocat in Bennekom)

Latest version ISO 19115-1: 2014

Relation with other standards

Evolution of standards

Centrum voor Geo-informatie Conclusions Describing spatial datasets with meta-data is essential to keep the data accessible in the future. For (inter) national exchange the use of a standard is a must. A problem with describing metadata is that the personal requirements are less than the organisational requirements. Centrum voor Geo-informatie

Thank you for your attention! Questions Thank you for your attention!

XML XML = Extensible Markup Language Standard of W3C Both machine and human readable Store data and exchange over the internet

Example <?xml version="1.0" encoding="UTF-8"?> - <note> <to>Tove</to> <from>Jani</from> <heading>Reminder</heading> <body>Don't forget me this weekend!</body> </note>

XML presentation

XML is everywhere! Word documents Meta data (geonetwork) Basis for GML, KML, CityGML , etc

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