Dear Syed, et al., I did much of what you described in the GRASS GIS a while back. (GRASS is public domain, not commercial, but it is a very good GIS.) The title of the paper is "Visualizing Spatial Data Uncertainty Using Animation" and a copy of it is located at:
http://www.geo.hunter.cuny.edu/~chuck/CGFinal/paper.htm The special issue of Computers & Geosciences (Vol. 23, No. 4, pp. 387-395, 1997) included a CD-ROM that contained some of the animations in MPEG form. My web site includes the animations and instructions on how to construct them. I used spherical interpolation to generate smooth transitions between realizations in order to keep the interpolations valid statistically. I have a more recent work that studies user perception of animated maps representing data and application uncertainty. An outline of that work from a conference presentation (with all equations and animations) is available at: http://www.geo.hunter.cuny.edu/~chuck/GIScience2000/paper.html The full paper is about to head out for peer review. sincerely, chuck Syed Abdul Rahman Shibli wrote: > > >From: "McKenna, Sean A" <[EMAIL PROTECTED]> > > > >1) When trying to explain the concepts of spatial variability and > >uncertainty, we have found that showing example realizations of what the > >possible distribution of contaminants could look like provides the groups > >involved to get a more intuitive understanding of these ideas. > > Taking this a step further, there was a paper in the AAPG Stochastic > Modeling and Geostatistics Volume entitled "The Visualization > of Spatial Uncertainty" (R Mohan Srivastava) which proposes the use > of probability field simulation to generate dynamic animations > of different realizations. I have yet to see it being implemented in > commercial software, although in concept I can see the benefit > of having something like this to illustrate the "equiprobable" > realizations. The idea was to generate smooth transitions of > successive "frames" by sampling from adjacent columns of a set of > probability values, for a movie-like effect. -- Chuck Ehlschlaeger N 40 46' 07.7", W 73 57' 54.4" Dep. of Geography 212-772-5321, fax: 212-772-5268 Hunter College [EMAIL PROTECTED] 695 Park Ave. http://www.geo.hunter.cuny.edu/~chuck/ New York, NY 10021 "We should not be ashamed to acknowledge truth from whatever source it comes to us, even if it is brought to us by former generations and foreign people. For whoever seeks the truth there is nothing of higher value than truth itself" - al-Kindi -- * To post a message to the list, send it to [EMAIL PROTECTED] * As a general service to the users, please remember to post a summary of any useful responses to your questions. * To unsubscribe, send an email to [EMAIL PROTECTED] with no subject and "unsubscribe ai-geostats" followed by "end" on the next line in the message body. DO NOT SEND Subscribe/Unsubscribe requests to the list * Support to the list is provided at http://www.ai-geostats.org
