SLOPE POINT SCREENING METHOD, TERMINAL DEVICE, MEDIUM AND SLOPE CALCULATION METHOD AND SYSTEM

摘要

A slope point screening method, a terminal device, a medium and a slope calculation method and system, the slope point screening method comprising: from among electronic horizon data, screening out slope points whose first-order derivatives relative to road offset values are greater than or equal to a derivative threshold as first-level slope points; and from among the first-level slope points, screening out second-level slope points according to a difference between the road offset values corresponding to two adjacent first-level slope points, and using the second-level slope points as discrete slope points after screening. In the slope calculation method, the slope value of the slope point between adjacent discrete slope points is recalculated according to the slope values of each discrete slope point and the corresponding road offset values. The number of slope points on a road ahead that need to be directly obtained are greatly reduced, the original shape of the road slope is maintained, and the processing process is simple.