An introduction to Metadata IWMI

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An introduction toMetadata _at_ IWMI

• Lakmali Wijesinghe Praveen Noojipady

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What is Metadata ?

• Metadata is definition data
• It provides information about an object whether
  it is
• a product e.g. bottle of milk, a book, a CD rom,
  etc
• a dataset e.g. rainfall time series, survey data,
  GIS, etc
• Exercise
• Collect metadata about these objects,
• We will ask metadata questions in a few minutes
• Those who can answer our metadata questions
• will keep the items !!

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Metadata Exercise

• First correct answer keeps the item
• If no correct answer closest answer keeps the
  item
• No answer then item goes to Abans

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Definition of Metadata

• Metadata refers to the use of a structured set of
  elements to describe an information resource and
  its intellectual property rights. The elements
  used should assist in the identification,
  location and retrieval of information resources
  by end-users.
• www.murdoch.edu.au/cwisad/glossary.html

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Metadata for libraries

• For example authors, year of publication,
  volume , etc
• Also indexes, abstracts, and catalog records
  created according to cataloging rules and
  structural content standards, as well as
  authority forms such as LCSH (Library of Congress
  Subject Headings)

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Library metadata history

• Such bibliographic metadata has been
  cooperatively created since the 1960s and made
  available to repositories and users through
  automated systems such as bibliographic
  utilities, online public access catalogs, and
  commercial online databases.

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Metadata Standards
The best one is the one that works for you / your
organization / your field

• The 4th Dublin Core Metadata Workshop Report
  DC-4, on WWW meta tag standardisation.
• Application of Metadata Standards, paper of ISO
  rules for development of metadata standards.
• Attributes supported by the Harvest Gatherer html
  metadata tags.
• CERES Standards
• Content Standards for Digital Geospatial Metadata
  
• CDS (Catalogue of Data Sources) of the European
  Environment Agency.
• Core Metadata Elements for Land and Geographic
  Directories in Australia and New Zealand,
  metadata standard, databases
• Dublin core metadata element set, draft metadata
  standard for the WWW.
• EdNA Metadata Home Page, draft metadata standard
  for the WWW in Australia (education), an
  extension of the Dublin core, using the SCHEME
  attribute.
• EPA Scientific Metadata Standards Project ,
  metadata standards
• GILS, official US standard for administrations
  (will probably be extended to world wide
  standard).
• IAFA, metadata standard for FTP and other
  Internet documents.
• Directory Interchange Format, the famous NASA
  DIF, source of various derived standards and used
  by the CEOS community and other directories
  related to earth observation and environment.
• FGDC Subcommittee on Cultural and Demographic
  Data (SCDD)
• html 4
• Metadata Standards Draft Implementation Guide for
  WAIS.
• Metadata standards of the US Geological Service
• Metadata Standards Draft Implementation Guide
• Metadata Standards For Gap Analysis

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Example of a metadata record

• Found on the web in XML format
• Imported into IWMI metadata server
• http//dw.iwmi.org/m3cat
• Describes a study to evaluate the effect of
  hydrologic restoration on the nesting
  distribution of Roseate Spoonbills in Florida Bay
  (USA) and surrounding mangrove estuarine habitats

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IDIS 2 Prototype metadata
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http//dw.iwmi.org/m3cat/
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• GEO SPATIAL METADATA for IWMIDSP
• Data sets in IWMIDSP
• 01 - Primary Data 02
  - Secondary Data
• 
  
  
• 
  
  (AVHRR-0.1degree-band1to2-reflectance-megafile)
  (LULC-avhrr-usgs-1992-93)
  
• 03 - Vector Data
  04 - Ground Truth Data
• 05 - Publication
• 06 - Presentation
• 07 Maps

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Metadata Tools for Geospatial Data
M³Cat / Intelec Geomatics Inc
Arc Catalog / ESRI
http//badger.state.wi.us/agencies/wlib/sco/metato
ol/mtools.htm
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XML /ASCII File
IWMIDSP
Export
Global
Arc Catalog
National
Import
Internet
River Basin
Regional
Ruhuna
M3Cat
03-Vector-Soil Map
IWMI
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Procedure Involved
Metadata Standards
Arc Catalog Tool
Import
Export
Edit
Arc Catalog
Arc GIS 8.3
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Spatial Data Organization Information
Spatial Domain
Automatic Extractions
Spatial Reference Information
Entity and Attribute Information
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Edit Metadata
Export Metadata
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Admin
Exported from Arc Catalog
Arc Catalog
Export
XML / ASCII File
Import
M3Cat
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Progress of Metadata activities

• Metadata for Rainfall Prototype
• 16 fully completed out of 668 records
• Metadata for IWMIDSP
• 50 of 300 records completed (30 automated
  manual)
• IWMIDSP well structured and organized

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THANK YOU FOR YOUR ATTENTION

• Questions ?
• Ideas ?
• Suggestions ?

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The FGDC standardIdentification information

• CITATION DESCRIPTION
• Citation
• Citation Information
• Originator  IWMI - Mr. Ariyaratne, B.R. -
  Benchmark Basin Coordinator
• Originator  Department of Meteology - Mr. Lalith
  Chandrapala
• the name of an organization or individual that
  developed the data set.
• Publication Date  29/08/2004.
• the date when the data set is published or
  otherwise made available for release.
• Title  Rainfall data
• The name by which the data set is known
• Description
• Abstract  This is a daily Rainfall dataset for
  Yala station located in Sri Lanka
• a brief narrative summary of the data set.
• Purpose  This dataset was collected to monitor
  rainfall at Yala station under controlled and
  constant conditions of elevation, exposure and
  maintenance.
• a summary of the intentions with which the data
  set was developed.

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The FGDC standardIdentification information

• TIME PERIOD OF CONTENT AND STATUS
• Time Period of Content
• Time Period Citation Information
• Range of Dates Times
• Beginning Date   1/1/2000
• Ending Date   2/28/2003
• means of encoding a range of dates and times
•  Currentness Reference ground condition
• the basis on which the time period of content
  information is determined.
• Status
• Progress   Complete
• the state of the data set.
• Maintenance and Update Frequency  As needed
• the frequency with which changes and additions
  are made to the data set after the initial data
  set is completed.

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The FGDC standardIdentification information

• SPATIAL DOMAIN
• Spatial Domain
• Bounding Coordinates
• West Bounding Coordinate  6.37
• East Bounding Coordinate  6.37
• North Bounding Coordinate  81.53
• South Bounding Coordinate  81.53
• the limits of coverage of a data set expressed by
  latitude and longitude values in the order
  western-most, eastern-most, northern-most, and
  southern-most.

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The FGDC standardIdentification information

• KEYWORDS CONSTRAINS
• Keywords
• Theme
• Theme Keyword Thesaurus  Rainfall
• Theme Keyword  Rain
• subjects covered by the data set
• Place
• Place Keyword Thesaurus  Location
• Place Keyword  Sri Lanka
• geographic locations characterized by the data
  set.
• Access Constraints  None
• restrictions and legal prerequisites for
  accessing the data set.
• Use Constraints  None
• restrictions and legal prerequisites for using
  the data set after access is granted.

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Standards we use compliant with data warehouse
project
FGDC Federal Geographic Data committee ISO TC
211 International Organization for
Standardization Technical Committee 211
Example
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Deference between Library metadata and other
Metadata GIS/RS DB Medical Ect.
But other Metadata is critical in personal
information management and for ensuring effective
information retrieval and accountability in
recordkeeping - something that is becoming
increasingly important with the rise of
electronic commerce and digital government
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IWMI example of metadata record
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Data about records and structures Such as
Length Fields Columns Rows
Data abut locations, haw it is associated and the
Ownership of data
Descriptive information about the context,
quality, condition and characteristics of data.
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Library
Library Metadata consist of information, object
at the time when it is first created or digitized
Descriptive surrogates such as catalog records
and Dublin Core metadata
Overview of Abstract, keywords, Author etc.
Metadata used to describe or identify information
resources Available to repositories and users
information professionals such as museum
registrars, library catalogers, and archival
processors are using information that they create
to arrange, describe, track and otherwise enhance
access to information objects
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