establishing vocabularies for the exchange of geological map data —how to herd stray cats linda...
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![Page 1: Establishing vocabularies for the exchange of geological map data —how to herd stray cats Linda Bibby, GeoScience Victoria](https://reader030.vdocuments.site/reader030/viewer/2022032702/56649cbb5503460f94983465/html5/thumbnails/1.jpg)
Establishing vocabularies for the exchange of geological map data —how to herd stray cats
Linda Bibby, GeoScience Victoria
![Page 2: Establishing vocabularies for the exchange of geological map data —how to herd stray cats Linda Bibby, GeoScience Victoria](https://reader030.vdocuments.site/reader030/viewer/2022032702/56649cbb5503460f94983465/html5/thumbnails/2.jpg)
How to herd stray cats
Introduction
GSV: new service delivery model– structured descriptive information– common vocabulary
Geological map data exchange– common vocabularies are
fundamental
A solution? – broader geoscience community
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How to herd stray cats
New way to store geological map data – Wider range of richer data– Improved work flows and products– Capture once, store once– Deliver many times, many ways
A new service delivery model
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How to herd stray cats
Significant benefits – Satisfies client demands– Future positioning (eScience)– Aligns GSV with external
developments (GeoSciML)
A new service delivery model
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How to herd stray cats
Geology has no respect for government
from Brown & Stephenson, 1991
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The Brave New World
How to herd stray cats
GeoSciML: a way to exchange digital data
– New insights from existing data– A new set of problems– What are we exchanging?
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Sharing digital data
How to herd stray cats
Digital data exchange requires 3 things:– Common data structure– Common delivery method– Common vocabulary
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The stray cats…
How to herd stray cats
‘…getting geologists to agree… is like trying to herd stray cats!’
— anonymous
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A simple problem…
How to herd stray cats
Name this rock
MAFIC ROCK (name based on colour index; observation)BASALT (type of volcanic rock; observation)SCORIA (textural term; observation)THOLEIITE (type of basalt; thin section examination)= THOLEIITIC BASALT (IUGS, 2002)BASANITE (type of volcanic rock; chemical analysis)ROUNDED COBBLE (particle size and shape)
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The stray cats…
How to herd stray cats
Many valid answers
Geoscientists constantly test geoscience concepts
Healthy and necessary part of a diverse science
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The Brave New World
How to herd stray cats
Risk of losing value caught up in traditional media
Computers cannot automatically adjust for:– Preferred terminology– Personal/house styles– Intent of the authors
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How to herd stray cats
Macedon Volcanic Group
Dmg
Dmw
Dmh
Unnamed
Willimigongong Ignimbrite
Hesket Ignimbrite
Granodiorite porphyry: dark grey; fine-grained with phenocrysts of quartz, feldspar, biotite; S-type intrusion.
Biotite-enstatite rhyodacite ignimbrite: dense blue-black; medium-grained; massive; recrystallised; pyroclastic deposits.
Rhyolite ignimbrite: red to dark grey; fine-grained; vitric-rich; with garnet phenocrysts; densely welded; pyroclastic deposits
from VandenBerg, 2005
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GSV vocabulary
How to herd stray cats
Keep the good, improve the bad
– Flexible, expandable– Unambiguous, robust– Hierarchical– Understandable by a range of users– International standards vs. user
requirements
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GSV vocabulary
How to herd stray cats
Structured descriptive information = Terms + Schemes + Relations– Terms: definitions– Schemes: logical groups of terms– Relations: hierarchy, synonyms
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GSV vocabulary
How to herd stray cats
Geological diversity?
– GSV: 16 ways to describe a sandstone!
– Hierarchy captures diversity (eliminates spelling mistakes…)
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How to herd stray cats
psammite
wackestone
Old scheme (flat list and free text)
arenaceousarenite arkosic
psammitic
quartzwacke
quartzwackes
sand/sandstone
sandstone
sandstone/quartzite
sanstone
subgreywackes
sublitharenite
sublithareniteswacke
GSV vocabulary
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How to herd stray cats
Scheme: descriptive rock name
sandstone (psammite)
arenite
quartz arenite (orthoquartzite; quartzite)subfeldspathic arenitefeldspathic arenite (arkose)sublithic arenite (sublitharenite)lithic arenitecalcarenite
wacke (wackestone)
quartz wacke (quartzwacke)feldspathic wacke (arkose)lithic wacke (greywacke)
GSV vocabulary
clastic rock
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How to herd stray cats
GSV vocabulary
after Le Maitre, 2002 (IUGS)
rhyolitic rockalkali feldspar rhyoliterhyolite
rhyodacitedacitic rock
dacitetrachytic rock
alkali feldspar trachytequartz alkali feldspar trachytefoid-bearing alkali feldspar trachyte
trachyteperalkaline trachytequartz trachytefoid-bearing trachyte
latitequartz latitefoid-bearing latite
descriptive name interpretive namehyaloclastitepeperiteagglutinateautobrecciaignimbritefragmental deposit
GSV (after Jackson, 2004)
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GSV vocabulary
How to herd stray cats
One solution to a problem
– Won’t work for everyone– No single ‘right’ answer– Broader geoscience community are
the only group who can endorse standards
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Herding stray cats?
How to herd stray cats
A single, rigid vocabulary is not essential
– Accommodate diversity– Encourage debate– Involve the broader community
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Not impossible
How to herd stray cats
Australia is unique
– Stratigraphic names database– Draft vocabularies working group– Common vocabulary for Australia– Influence international debate
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Summary
How to herd stray cats
Common vocabularies are essential
– No need to enforce single, inflexible terminology
– Needs broad support– Australia is a unique environment
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A word from our sponsor
How to herd stray cats
Visit the GSV booth
www.dpi.vic.gov.au/minpet/