Embed Size (px)
Citation preview
Arnold Bregt
SDI from a technological perspective: Metadata
2
Components
PeoplePeople
Technology
Policies
Standards
Spatial Data
Spatial Data
Experiment
Centrum voor Geo-informatie
Centrum voor Geo-informatie
Stsul.dat
0 0 201 0 155 0 3510 0 4575 0 30. . .. . .
Depth to the pyritic layer
5
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
10
Centrum voor Geo-informatie
International standards
America (FGDC) Europe (CEN) ISO (ISO19115)
Metadata Standards
There are many
12
Centrum voor Geo-informatie
Standards for Meta-data
0102030
405060
CEN
FGDC
ANZLIC
Natio
nal
Oth
ers (
Inho
use)
ISO
-pro
jects
%
2000 April
2000 Dec.
2001 Dec.
2002 Dec.
Metadata Standards
But the leading one is ISO 19115
14
INSPIRE
15
Metadata INSPIRE
Metadata INSPIRE
16
Metadata Standards
Profiles
17
18
19
Metadata implemantation
Profiles from ISO 19115
Implementation schema in XML (ISO 19139)
Software support (e.g. Geocat in Bennekom)
20
Latest version
ISO 19115-1: 2014
21
Evolution of standards
22
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
25
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>
26
XML presentation
27
XML is everywhere!
Word documents
Meta data (geonetwork)
Basis for GML, KML, CityGML , etc
28
