Date post: | 28-Nov-2014 |
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Technology |
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Jakob Lagerstedt, Mats HögströmConstructing a Federated Data Distribution Service for Universities
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Overview
Background
Previous Attempts
A modern solution
Some tricks learned
Results
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Background
We are from the
Swedish University of Agricultural Sciences
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Background
Data and researchers in Sweden
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Background
Not free
Image courtesy of KJGarbutt (CC BY 2.0)
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Background
Strange formats
Image courtesy of Toronto Public Library Special Collections (CC BY 2.0)
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Previous attempts
Distribution was difficultRequired authorization and data preparation
Researchers would share pieces of data on USB drives (sneakernets)
Image from http://japanese.engadget.com/2005/11/12/hdd-circa-1975/
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A modern solution
Geographic Extraction Tool
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A modern solution
Geographic Extraction Tool
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A modern solution
Geographic Extraction Tool
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Tricks of the trade ()
Do not panic
All the code is in the handouts if you are interested!
Image courtesy of Nico Kaiser (CC BY 2.0)
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FME server Rest API
Token service /fmetoken/service/generate
HTTP get /fmerest/repositories/" + your_fme_repo_name + ".json
Tricks of the trade (Servlet)
Image courtesy of abraham.williams (CC BY 2.0)
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Tricks of the trade (Shutdown Python script)
To enable unsupported functions
Zip & Email & Remove files that have been downloaded, Anything you want!
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Tricks of the trade (External script example 1 handout)
Use an external script to enable faster debugging
Monkey patch sys or import something from path (yes we actually use the linux version)
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Tricks of the trade (SpatiaLite example 2 handout)
Wonderful format for mixed environments
We have Qgis, Arcmap, FME, they all read it!
Image courtesy of juicyverve (CC BY 2.0)
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Tricks of the trade (SpatiaLite)
However, FME does not read as efficiently as other formats
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Tricks of the trade (SpatiaLite)
does not set spatial index
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Tricks of the trade (SpatiaLite)
Can fix
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Tricks of the trade (Google Fusion Tables)
Fusion tables are nice for reporting
But often writes fail (we do not know why, reported the issue)
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Tricks of the trade (KML network link)
KMLs are nice for reporting
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Results
23 Universities
100K distributed data sets ( 400 * total area of country)
6000 Unique users
Image courtesy of saamiblog (CC BY 2.0)
Thank You!
Questions? Handout link
http://pluto.slu.se/drop/public.php?service=files&t=2e0c13550e0c71e963e6f6bb2c52569c
For more information: jakob.lagerstedt | mats.hogstrom @slu.se Swedish University of Agricultural Sciences
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