| 摘要 |
<p>An apparatus, method and a computer program for generating map of the terrain in a geographic area is provided. The method comprises: determining, for each of a plurality of pixels, an elevation value from digital terrain data for the portion of the geographic area represented by the pixel; determining, for each of the plurality of pixels, at least one parameter from parameter data different from the elevation value for the portion of the geographic area represented by the pixel; using the elevation value and the at least one parameter, for each of the plurality of pixels, to select a colour for the pixel from one or more predetermined texture files; using the digital terrain data to determine, for each of the plurality of pixels, a normal to the terrain of the geographic area represented by the pixel, and using the determined normal and a determined direction of sunlight, for each of the plurality of pixels, to determine a shading for the pixel; and generating the map for display on the display device by applying the selected colour and determined shading to each of the plurality of pixels.</p> |
