About Demo
The SCO has developed a set of instructional computer programs to illustrate the use of digital orthophotos. Although orthophotos derive from aerial photography, they function better as a map because their visual distortions have been removed.

This package explains digital imagery, using digital orthophoto files as illustrations and elaborating on windowing, zooming, pixel resolution, histograms, contrast stretching, gray-scale slicing, and false-color palettes. This package has been revised and enhanced from an earlier SCO digital orthophoto diskette set.

In this new version, we have included a new full-frame example of higher resolution (1-meter) imagery to provide a glimpse of the kind of sharpness that is typical of the products of the National Digital Orthophoto Program. Also enhanced are the comparisons between 4-meter, 2-meter, and 1-meter resolution images of a common ground area.

To view this demo, you need only an IBM-compatible personal computer that supports VGA graphics programs. This version uses IMDISP display software (version 7.9), which among various enhancements, is capable of utilizing various types of SuperVGA video cards. This advanced functionality means that digital orthophoto images can be displayed at higher screen resolutions, with their full range of 256 gray levels, and at a higher speed than VGA alone.

We have produced a set of instructions for installing and using this package. The instructions include background information on the software and image files.

Please note:This program does not work on computers running the Microsoft Window NT operating systems.
Download Demo
You can download the zipped version here free of charge. Use WinZip or any other unzip program to extract the files.