Title of Paper:
A Case Study of DISS Usage - Employing the Distributed Image Spread Sheet to
Visualize, Analyze and Animate MODIS Data
Principal Author:
Michael Manyin
Abstract: The Distributed Image
Spread Sheet is a program for browsing and computing over large Earth Science
image data sets. It combines the
organization and formulaic paradigm of a traditional numeric spreadsheet with
the visualization capabilities of graphics workstations. As such, it is particularly well suited for viewing
and calculating over data from remote sensing platforms like the EOS Terra
spacecraft.
This paper describes a case in which DISS was
used to study MODIS Land parameters, providing basic statistics, supporting
visual investigation and capturing screen shots which were easily converted
into MPEG animations. During this project,
some features of DISS were extended or newly implemented. For example, a 'mask' function and bitwise
image operators were introduced, image statistics were extended to include
standard deviation, and HDF-EOS data field names were incorporated as command
line options. As a result the
visualization and computational tasks became significantly more convenient and
straightforward. The paper concludes with a examination of the resulting Spread
Sheet script which satisfied the original objectives, and a discussion of
likely future enhancements to the program.