NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.
To learn about what's going on, see About the Archive Site.
NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.
To learn about what's going on, see About the Archive Site.
Thanks Ugo, Bill, By the time the seismic data gets to me it is, without exception, regularly sampled. That is the sampling interval in each dimension is constant (but may be differnt between dimensions). Typically we index the values according to inline, crossline and time. Think of time as equivalent(ish) to depth. So all three of these can be integers. Is there any computational advantage to using an Integer3DSet over a Linear3DSet? Andrew PS: In case you're interested, the origin of the nomenclature inline and cross line comes from how the data is acquired: a boat sail up and down surveying the data. The "inline" direction is the direction in which the boat sailed. -----Original Message----- From: Ugo Taddei [mailto:p6taug@xxxxxxxxxxxxxxxxx] Sent: 22 July 2002 15:03 To: Wilson, Andrew, J Subject: Re: Newbie using VisAd for Seismic attribute calculation and visualisation Hi, > As part of this R&TD I need to revive and extend some old > seismic processing algorithms. I'll need to read in a 3D cube > of seismic data. Think 3D medical imaging data but > geospatially reference and covering up to a 1,000 square > kilometres at a time. Because of the data sizes I'll probably > start with just a basemap and a facility to display vertical > and horizontal sections. In VisAD-speak, this, the cube, is a Linear3DSet. There are other "cubes" with different sampling, but the linear 3D set will probably do the trick. Check out: http://www.geogr.uni-jena.de/~p6taug/visad/tutorial/s4/Sectio n4.html#section4_10 ... > > My second son was born last week (Mother and baby doing fine, > thanks) so I'm hoping that by working with the VisAd software > and community I can get this work done and still spend a > little time at home. ...if you have some time between nappy changes... As Bill said, Jython might save you some time: http://www.ssec.wisc.edu/~tomw/visadtutor/index.html Cheers, Ugo ______________________________________________________________________ BG Energy Holdings Limited (a member of BG Group) Registered in England No: 3763515 Registered Address: 100 Thames Valley Park Drive Reading Berkshire RG6 1PT UK Telephone: +44 (0) 118 935 3222 Website: http://www.BG-Group.com This e-mail is intended only for the addressee named above. As this e-mail may contain confidential or privileged information, please advise us immediately if you are not the named addressee or the person responsible for delivering the message to the named addressee. The contents should not be disclosed to any other person nor copies taken. ______________________________________________________________________
visad archives: