Hyercube viewer: New displays and new data-types

Display options

There are several possible ways to plot regular fields. SEP has generally used raster plots to display data. These plots have the advantage of being able to display relatively dense data within wide spatial frequency range. In some cases raster is not the ideal plotting option.

When examining waveforms it is often useful to display traces in a wiggle format. Wiggle format allows you to see more clearly the actual waveform recorded by the sensor. Figure 1 demonstrates hypercube's wiggle capabilities. In this case we are overlaying a velocity model on top of a migrated volume. In order to see the waveform each trace must take a few pixels of screen width, we chose to use a minimum of 8 pixels. If $8n > w$, where n is the number of traces and $w$ is the width in pixels of the display we subsample the data volume until this criteria is met.

wiggle
Figure 1. Velocity model overlain by a wiggle plot of a migrated volume. [NR]

For fields that vary smoothly it is often useful to contour the data rather than display directly each cells value. Figure 2 demonstrates this concept by drawing velocity contours on top of migrated volume. The program attempts to separate contour labels by some distance. Note the jagged nature of the contour lines. This is due to storing the velocity data as a series of bytes rather floats.

contour
Figure 2. Migrated volume overlain by contours. Note the jagged nature of the contours due to the velocity volume being stored as bytes. [CR]

Hyercube viewer: New displays and new data-types