DRAWING DATA GENERATION DEVICE AND DRAWING DEVICE
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United States of America Patent
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app pub date -
Sep 18, 2015
filing date -
Mar 21, 2013
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Abstract
A drawing data generation device performs an integration process on map data so as to integrate line data for drawing linear features such as roads, such that a drawing speed of a map image is improved. The line data is grouped by the line type and the line width. The integration process links thin solid lines L1 and L3 by a non-display line LA1, and links thick solid lines L2, L4 and L5 by non-display lines LA2 and LA3, for example, so as to integrate the line data of a plurality of lines into integrated line data for an integral line formed of linked lines in a same group. Drawing a map using the map data in which the line data is integrated reduces the call counts for a line function for drawing lines provided in a graphics, thereby shortening
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