[PDF][PDF] Geographic data base image processing at Mississippi State

RA Haynes - Proceedings of the 18th annual Southeast regional …, 1980 - dl.acm.org
RA Haynes
Proceedings of the 18th annual Southeast regional conference, 1980dl.acm.org
A geographic image as stored in a computer is simply data that can be processed to array
form which, when displayed, represents a two-or three-dimensional image. Generally,
several images, related by a common geographic location, are needed to provide end users,
that is, persons involved in cartographic, land management, and other geographic
applications, with adequate information. The reasons for maintaining related geographic
images in a common data bank are much the same as those for storing any related data in …
A geographic image as stored in a computer is simply data that can be processed to array form which, when displayed, represents a two-or three-dimensional image. Generally, several images, related by a common geographic location, are needed to provide end users, that is, persons involved in cartographic, land management, and other geographic applications, with adequate information. The reasons for maintaining related geographic images in a common data bank are much the same as those for storing any related data in such a form. The need to access several images at one time dictates the need for centralized storage. Also, an image data base allows independence of image processing functions from image data while at the same time reducing the overhead associated with maintaining multiple files.
Operations performed on an image data base are much like operations performed on any data base. The data must be maintained and updated; queries answered; hard copy reports generated. However, processing an image data base is necessarily different from processing a non-image data base primarily because the basic unit of an image data base is an image, a visual form of information. While image components, that is, pixels, or cells, and scanlines, or rows or columns of cells, may be individually accessed and processed, they are not meaningful taken outside the context of the image. Most operations on an image produce another image. In this sense traditional data base software is not easily adaptable to processing an image data base.
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