an introduction to metadata tammy walker beaty environmental sciences division oak ridge national...
TRANSCRIPT
An Introduction to Metadata
Tammy Walker BeatyEnvironmental Sciences Division Oak Ridge National LaboratoryOak Ridge, [email protected]
Data Management Practices for Early Career ScientistsNASA Terrestrial Ecology Science Team MeetingMay 2, 2013
NASA TE Best Data Management Practices, May 2, 2013
An Introduction to Metadata
• What is Metadata?• Why do we need Metadata?• Who uses Metadata?• Where does Metadata come from?• When do you prepare Metadata?• How do I prepare Metadata and how will it be
used?
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NASA TE Best Data Management Practices, May 2, 2013
What is Metadata?
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WhoWho collected the data?Who processed the data?Who wrote the metadata?Who to contact for questions?Who to contact to order?Who owns the data?
WhenWhen were the data collected?When were the data processed?
WhatWhat are the data about?What project were they collected for?What is the quality?What parameters were measured?What format are the data in?What are appropriate uses?
HowHow were the data collected?How were the data processed?How do I access the data?How much do the data cost?How was the quality addressed?
WhereWhere were the data collected?Where were the data processed?Where are the data located?
WhyWhy were the data collected?
NASA TE Best Data Management Practices, May 2, 2013
Who, What, Where,
When, Why, and HowWho, What, Where,
When, Why, and How
Why do we need Metadata?
• Metadata is the language of Data
• Metadata Forms Documentation
• Metadata enables Management of the data including:– Discovery– Access– Use
Which one, What kind, How
many/how much, Whoes
Which one, What kind, How
many/how much, Whoes
The adjectives adverbs of data
NASA TE Best Data Management Practices, May 2, 2013
Who uses Metadata?
• Everyone uses metadata• We use metadata without knowing it • We use metadata to “know” data
Tuna or Cat food? Coke?
NASA TE Best Data Management Practices, May 2, 2013
Where does Metadata come from?
• Here is a data file
• Here is the same data file with metadata
• Which one is useful?
Metadata comes
from knowing
the dataMetadata comes
from knowing
the data
NASA TE Best Data Management Practices, May 2, 2013
How do I prepare Metadata and how will it be used?
• Ideally you prepare metadata while you are working with, collecting, and preparing data – Document your research as you conduct it– Use an xml editor (oxygen, morpho, etc)
• Best Practices, http://daac.ornl.gov/PI/BestPractices-2010.pdf • Multiple Metadata Standards Exist (see additional slides for
examples)– FGDC, ISO 19115, EML, Darwin Core, etc .: - – Choose one and go for it
• Metadata is used to identify, locate, understand and explain the data (Google, custom viewers, etc)
NASA TE Best Data Management Practices, May 2, 2013
What does Metadata look like?
• Ideally you prepare metadata while you are working with, collecting, and preparing data – Document your research as you conduct it
• Best Practices, http://daac.ornl.gov/PI/BestPractices-2010.pdf
• Multiple Metadata Standards Exist (see additional slides for examples)– FGDC, ISO 19115, EML, Darwin Core, etc .: - – Choose one and go for it
• Metadata is used to identify, locate, understand and explain the data (Google, custom viewers, etc)
NASA TE Best Data Management Practices, May 2, 2013
Metadata Examples
One set of Metadata
displayed 3 waysOne set of Metadata
displayed 3 ways
Additional Slides
NASA TE Best Data Management Practices, May 2, 2013
Multiple metadata standards exist
• Content Standard for Digital Geospatial Metadata (CSDGM)– Federal Geographic Data Committee (FGDC)– Emphasis on geospatial data; environmental sciences
• Includes: Biological Data Profile (BDP)• Darwin Core
– Emphasis on taxa - observations, specimens, and samples• Dublin Core Element Set
– Emphasis on describing resources for discovery (video, images, web pages, and physical resources books, objects)
• Ecological Metadata Language (EML)– Emphasis on documentation of ecological data
• ISO 19115 Geographic information: Metadata– Emphasis on geospatial data and services
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NASA TE Best Data Management Practices, May 2, 2013
Multiple metadata editors exist
• CatMDEdit – ISO 19115, open source• FGDC Metadata Editor for ArcGIS 10• DCMI Tools & Software – Dublin Core• oXygen – ISO 19115, commercial• Morpho – EML Editor• Many others
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NASA TE Best Data Management Practices, May 2, 2013
Metadata is the language of data
• Metadata are the descriptors of data that make it useful (the adverbs and adjetives)– Metadata enables data to speak to us so that we
can understand and use it.– Who, What, Where, When, How, and Why
• Metadata transforms data into a data set– (Metadata + Data) = Data Set– (Data Set – Metadata) = Mystery
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NASA TE Best Data Management Practices, May 2, 2013
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