The spatial relationship between the high-resolution bathymetry and bottom photographs is difficult to visualize in a standard GIS. One way this is done is to "hotlink" the bottom photographs to the navigation points marking the location. This method works fine for looking at individual photos, but is difficult to use when attempting to understand the relationship between several photos, or several photos and the bathymetry. For this reason, a subset of the bottom photographs was selected to be combined with the bathymetry as vertical images in Fledermaus. Fledermaus is a 3D visualization software package developed by Interactive Visualization Systems (IVS) and has the capabilities to create MPEG animations. Figures 7, 8 and 9 are snapshot examples of the bottom photographs as vertical images with the underlying bathymetry in Fledermaus.
The vertical exaggeration for the bathymetry is 18X, and the bottom photographs are also exaggerated. Although each photo has an actual footprint of approximately 1 m, for the purposes of this visualization, each vertical photograph represents 200 m in width and 180 m in height. This extreme exaggeration is necessary so that features within each image can be viewed easily. The blue diamonds in each figure represent the locations of bottom photographs, while the red squares indicate photograph locations that are used as vertical images.
The animations were created using IVS software. The initial flight path was generated with a 3D mouse (bat) "flying" through a Fledermaus scene. The flight path was then smoothed and the MPEG animation from each area was created using the Movieclient program within the IVS software package. These files are MPEG-1 format which should be viewable on most computer systems. The software package VideoMach was used to extract the small snippets of animation presented here.
The scenes used to create the animations are also available on this DVD from the data/visualization directory. These files are only available within the WinZip files.IVS has a free viewer, iView3D (http://www.ivs3d.com/products/iview3d/), which is available to view files in the Fledermaus file format.