| 摘要 |
<p>A navigation apparatus (200) comprises a processing resource (202) that is operably coupled to a data store (214) comprising terrain data (294) relating to a three- dimensional terrain and feature data (296, 298) associated therewith. A location determination unit (202, 224) is also provided and capable of determining a location. A view generation engine (292) supported by the processing resource (202) provides output data receivable by a display device (206). The terrain data (294) is arranged as a network of triangular cells comprising a triangular cell (350) having respective height data associated with each vertex thereof; the triangular cell (350) is relevant to the location. The feature data (296, 298) comprises information concerning a feature (352) relevant to the location. The processing resource (202) accesses a part of the terrain data (294) and a part of the feature data (296, 298) relevant to the location, and the view generation engine represents in planar form the triangular cell (350) and the feature (352) relative thereto.</p> |
