The vector to raster conversion: (mis)use in geographical information systems

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Abstract
Many geographical information systems offer the possibility of converting vector data to raster data and using the raster pattern for analysis. This conversion process is already well known and has been used for many years. This paper shows how a selection of eight geographical information systems convert vector test data to a raster pattern. Each system handles this process in its own way, giving results that differ both in number and in the location of assigned raster cells in the raster pattern. The results of the conversions are compared with a desired raster pattern based on five simple principles. Suggestions are made about standardizing the process of conversion for all geographical information systems to make it possible to create and exchange data more safely.

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