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An Examination Of Techniques For Reformatting Digital Cartographic Data / Part 2: The Vector-To-Raster Process

1981; University of Toronto Press; Volume: 18; Issue: 3 Linguagem: Inglês

10.3138/k632-661r-k76j-1r80

1911-9925

Donna J. Peuquet,

Historical Geography and Cartography

Current graphic devices suitable for high-speed computer input and output of cartographic data are tending more and more to be raster-oriented, such as the rotating drum scanner and the color raster display. However, the majority of commonly used manipulative techniques in computer-assisted cartography and automated spatial data handling continue to require that the data be in vector format. This situation has recently precipitated the requirement for very fast techniques for converting digital cartographic data from raster to vector format for processing, and then back into raster format for plotting. The current article is the second part of a two-part paper that examines the state of the art in these conversion techniques. In Part 1, algorithms to perform all phases of the raster-to-vector process were outlined and compared. This paper outlines and compares algorithms to perform each phase of the vector-to-raster process. Methods for combining these algorithms into an efficient, integrated process are presented; they are followed by a discussion of the raster-to-vector conversion process as a whole including commonalities, methods for improving the overall process, and directions for future research.