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Geometric laws for moire patterns produced by cartographic tint screens

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https://ir.library.oregonstate.edu/concern/graduate_projects/2j62s5576

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  • Moire patterns have been identified by printers as undesirable screen patterns caused by incorrect angling of overprinted halftones. These patterns are being examined by cartographers as a possible alternative to traditional methods of producing patterned areas on maps. Map design guidelines are needed before the use of moires can become prevalent, and to develop the necessary guidelines the characteristics of moires must be thoroughly defined. Four important aspects for studying moires have been identified as arrangement, orientation, gray tone, and moire pattern size. Kimerling examined these attributes for superimposed square dot arrangement screens, and formulated predictive equations. This study analyzes the four attributes for both triangular and parallelogram dot arrangement screens to determine if equations which are universally applicable to all types of dot arrangement screens exist.
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