How do I Make GeoWall Images from My Data

1
How do I Make GeoWallImages from My Data?

• Most common request
• There are several software packages, often not
  free
• Introducing

http//holodraw.org
2
What Is HoloDraw?

• Designed to read YOUR data
• Works with GMT maps and scripts
• Produces VRML images for
• GeoWall
• Web browsers (need a plug-in)

http//holodraw.org
3
HoloDraw examples

• Tomography
• Hypocenters
• Evaluating and refining proposed models

http//holodraw.org
4
HoloDraw examples of XYZA data

• XYZ is location of hypocenter
• A can be some Attribute you would like to
  represent in color
• In this case A (the color) represents the date of
  the quake
• Colors can be assigned using a GMT Color Palette
  Table (.cpt file)

http//holodraw.org
5
HoloDraw can make 3D plots of

• Points
• pointx y z
• Lines
• linex y z, x y z
• Solid surfaces
• polygonx y z, x y z

http//holodraw.org
6
From GMT to HoloDraw
http//holodraw.org
(Thomas et al.,2003)
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How to Get Started with HoloDraw

• Download from http//holodraw.org
• Software runs on Unix, Mac or Windows
• Web site also has copies of all images shown
  today, so you can download to your GeoWall

http//holodraw.org
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References and Credits

• GeoWall - Daniel Steinwand, Brian Davis, Nathan
  Weeks, "GeoWall Investigations into Low-cost
  Stereo Display Systems", 2002 USGS Open File
  Report.
• GMT - Wessel, P. and W. H. F. Smith, Free
  software helps map and display data, EOS Trans.
  AGU, 72, 441, 1991
• VRML specs http//www.web3d.org/fs_specifications.
  htm
• VRML plug-ins for your web browser
• Cortona http//www.parallelgraphics.com/products/c
  ortona/
• Cosmo Player http//ca.com/cosmo/html/player.htm
• Global tomography - Grand, S.P., Mantle
  shear-wave tomography and the fate of subducted
  slabs, Philosophical Transactions of the Royal
  Society of London Series a- Mathematical Physical
  and Engineering Sciences, 360 (1800), 2475-2491,
  2002.
• Hotspot map - Thorne et al. 2003, PEPI, in press.
• South Africa tomography - Fouch, M.J., D.E.
  James, J.C. VanDecar, S. van der Lee, and the
  Kaapvaal Seismic Group, Mantle seismic structure
  beneath southern Africa, S. African J. Geol., in
  press, 2003.
• Japan raypaths - Bernot, C.M., and M.J. Fouch,
  Shear wave splitting and mantle flow beneath
  Japan, to be submitted to Geophys. Res. Lett.,
  2004.
• Hypocenters - E.R. Engdahl, Van der Hilst, R.D.,
  and Buland, R.P., 1998, Global teleseismic
  earthquake relocation with improved travel times
  and procedures for depth determination, Bull.
  Seism. Soc. Amer., v. 88, pp. 722-743.
• Bouncing raypaths - Lay et al. 2003, GRL, in
  preparation
• Ribbon plot - Thomas, C.H., Garnero, E.J, Lay,
  T., Highly variable topography beneath the Cocos
  plate from frequency-wavenumber migration of
  broadband S and ScS waves, in prep., 2003.

http//holodraw.org