A process for the correction of the heights model for the navigation device on the basis of 3d - country marks

摘要

The present invention relates to a process for the display of a navigation map (1) for a navigation apparatus (100), wherein the navigation map (1) location coordinates, which a height profile (24) is superimposed, and wherein the navigation map (1) furthermore, 3d - landmarks (26) which, in connection with the height profile (24) are displayed. According to the invention, the process for the display of the card at least the following steps: reading in of a height model (23) in a working memory (21) of the navigation device (100), determination of each of the horizontal projections of the 3d - country marks (26), after which it is determined which pixels (25) of the heights model (23) of the respective plan view, is covered by the correction of the heights model (23) at the points at which these of a 3d - country mark (26) are covered, reading of the height values of the screen dots (25) and at least partially of the halftone dots (25) surrounding eight other pixels (25), calculating a mean value for the altitude value, allocation of the calculated maximum value to all the pixels (25), the of the relevant 3d - country mark (26) are covered, allocation of the calculated maximum value to all the pixels (25), the cover grid points (25) are adjacent to one another, so that all the pixels (25) below the relevant altitude model (23) have a uniform height, in order to smooth the latter in the plane.