Government of Western Australia Department of Mines and Petroleum

Geological Survey of Western Australia

The geological map of Western Australia – past, present and future

David Martin

With special acknowledgement to: Ian Tyler, Roger Hocking, Fop Vanderhor, Richard Flint, and all

Project Teams; also Jenny Mikucki and Angela Riganti

Government of Western Australia Department of Mines and Petroleum Government of Western Australia Department of Mines and Petroleum Government of Western Australia Department of Mines and Petroleum

Outline

• A brief history of State maps

• Compilation of the 2015 State map

• Improvements and innovations in the 2015 edition

• The future of State-level datasets

Government of Western Australia Department of Mines and Petroleum Government of Western Australia Department of Mines and Petroleum Government of Western Australia Department of Mines and Petroleum

Low & Connelly (1957)

History of the State map

• Earliest unofficial maps 1848–1886

• First official map 1894 • 1966 – complete

coverage at 2.5 M • 1973 – GSWA style • 1998 – end of manual

compilation

Nicolay (c. 1886) Woodward (1894) Horwitz (1966) Myers & Hocking (1998) Von Sommer (c. 1848) Brockman (1916)

Government of Western Australia Department of Mines and Petroleum Government of Western Australia Department of Mines and Petroleum Government of Western Australia Department of Mines and Petroleum

2015 digital compilation

• Roll-up of 2014 State 1:500 000 base-data according to ENS definitions

• Simplification according to GIS standards • Further geological simplification of digital

data — 446 unique codes in two layers • Divergence of digital data and printed map • Simplification and optimisation of data for

offset printing — 174 codes (134 colours)

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1998 vs 2015 – spot the difference

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Printed map vs digital data

2015 1998 digital printed

Government of Western Australia Department of Mines and Petroleum Government of Western Australia Department of Mines and Petroleum Government of Western Australia Department of Mines and Petroleum

Legend enhancements

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2015 geological updates

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2015 dyke layer

1:2.5 M

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The future of State datasets

• Annual 1:500k & 1:2.5M digital updates • Complete integration with ENS • Datasets to support UNCOVER initiative &

mineral system studies • 2.5D vs 3D data delivery • Printed maps vs digital data delivered via

the web & mobile devices • Novel/alternative methods of data delivery

Government of Western Australia Department of Mines and Petroleum Government of Western Australia Department of Mines and Petroleum Government of Western Australia Department of Mines and Petroleum

Published ENS units (Nov 2015)

1:2.5 M 1:500 k

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UNCOVER: cover vs “cover”

• Cenozoic “bedrock” vs Cenozoic layer

• Mesozoic & Paleozoic bedrock layers

• Data delivery & relevance to detection

• Attribution (exposed vs concealed structures)

Government of Western Australia Department of Mines and Petroleum Government of Western Australia Department of Mines and Petroleum Government of Western Australia Department of Mines and Petroleum

The future of State datasets

• Annual 1:500k & 1:2.5M digital updates • Complete integration with ENS • Datasets to support UNCOVER initiative &

mineral system studies • 2.5D vs 3D data delivery • Printed maps vs digital data delivered via

the web & mobile devices • Novel/alternative methods of data delivery

Government of Western Australia Department of Mines and Petroleum Government of Western Australia Department of Mines and Petroleum Government of Western Australia Department of Mines and Petroleum

WA Unearthed … the movie

Government of Western Australia Department of Mines and Petroleum Government of Western Australia Department of Mines and Petroleum Government of Western Australia Department of Mines and Petroleum

Conclusions

• 2015 State map is state-of-the-art, but possibly the last to be offset printed

• Unprecedented level of map detail and background digital data delivered online via GeoVIEW.WA & digital download

• Digital data presents new opportunities for understanding and communicating State geology