Arnold Bregt SDI from a technological perspective: Metadata

1 Components People Technology Policies Standards Spatial Data

Experiment Centrum voor Geo-informatie

Stsul.dat

Depth to the pyritic layer 4

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

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

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

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

Exercise Draft your own Metadata Standard Draft your own Metadata Standard 9

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

Metadata Standards There are many 11

Centrum voor Geo-informatie Standards for Meta-data

Metadata Standards But the leading one is ISO

INSPIRE 14

Metadata INSPIRE 15

Metadata Standards Profiles 16

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Metadata implemantation Profiles from ISO Implementation schema in XML (ISO 19139) Software support (e.g. Geocat in Bennekom) 19

Latest version ISO :

Evolution of standards 21

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.

Thank you for your attention! Questions

XML XML = Extensible Markup Language Standard of W3C Both machine and human readable Store data and exchange over the internet 24

Example - Tove Jani Reminder Don't forget me this weekend! 25

XML presentation 26

XML is everywhere! Word documents Meta data (geonetwork) Meta data Basis for GML, KML, CityGML, etcGMLKML 27