Topographic database based topographic displaying method

Abstract

The invention relates to a topographic database based topographic displaying method. The topographic database based topographic displaying method comprises the following steps of (a) measuring longitude and latitude coordinates of a flying aircraft in a space and the height H of the flying aircraft in the space; (b) using the horizontal plane at the flying height H of the aircraft as reference to set an upper height redundancy H1, a downward height redundancy H2, a leftward height redundancy L1, rightward height redundancy L2 and a front horizontal observation distance D so as to form a closed space; (c) conducting reasonable laying within a height redundancy range and using a topographic database to obtain topographic dot matrixes within the horizontal plane where all heights are located; (d) superposing the topographic dot matrixes within the horizontal plane of all selected heights, wherein the connecting lines of dots closest to the aircraft, of formed distances, form a topographic contour line which serves as a safety boundary of the flying aircraft. Therefore, the formed topographic contour line can play a topographic warning role, and the topographic database based topographic displaying method is especially suitable for special topographies and can provide accurate and reliable topographic warning information for the aircraft during topographic inhabitation.

Description

technical field [0001] The invention relates to a topographic display method based on a topographic database, in particular to a display method that provides clear and reliable topographical warning information by means of topographic contour lines. Background technique [0002] Currently, TAWS (Terrain awareness and warning system: Terrain Awareness and Warning System) is used in civil aviation to identify dangerous terrain information. The terrain display focusing on the vertical profile has been applied in operation, and there has been continuous research on 3D terrain display, but it is not yet mature and has not been put into use. [0003] In the prior art, whether it is a mature horizontal terrain display or a vertical profile terrain display, there is a problem: when the aircraft is flying in a mountainous area, especially when flying close to the terrain, or at a special airport according to RNP (Required Navigation Performance: precision navigation Technology) When...

AI Technical Summary

Problems solved by technology

The terrain display focusing on the vertical profile has been applied in operation, and there has been continuous research on 3D terrain display, but it is not yet mature and has not been put into use

[0003] In the prior art, whether it is a mature horizontal terrain display or a vertical profile terrain display, there is a problem: when the aircraft is flying in a mountainous area, especially when flying close to the terrain, or at a special airport according to RNP (Required Navigation Performance: precision navigation Technology) When flying special routes, traditional warning methods are prone to harassing warnings

This will cause the aircraft to lose the predictive terrain collision avoidance warning function during this terrain suppression period

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