Engineering surface measurement method based on ellipsoidal surface calculation

Abstract

The invention discloses an engineering surface measurement method based on ellipsoidal surface calculation. The method comprises the steps of S1, converting the spatial coordinates of all sample points on the ground surface to the ellipsoidal surface of the earth through Gaussian coordinates to obtain the geodetic coordinates of all sample points; S2, according to the geodetic coordinates of eachsample point, determining a to-be-measured engineering region range on the ellipsoidal surface of the earth through a point position relationship; S3, calculating the radius of curvature of meridian and the radius of curvature in prime vertical of the to-be-measured engineering region according to the geodetic coordinates of each sample point; and S4, calculating the area of the to-be-measured engineering region according to radius of curvature of meridian and the radius of curvature in prime vertical. The method is suitable for calculating the engineering surface area with large area or largetopographic relief, and solves the problem that the existing projection method projects the measurement observation value to the plane and then calculates the surface area, the projection error is generated when the measurement observation value is projected to the plane, and the calculation of the engineering surface area is influenced.

Description

technical field [0001] The invention belongs to the technical field of measurement, and in particular relates to an engineering surface measurement method based on ellipsoid calculation. Background technique [0002] At present, in the actual engineering surveying operations, for the calculation method of engineering surface area, the traditional projection method is generally used to project the measured observation value onto the plane and then calculate the surface area, but any projection condition cannot avoid the deformation during the earth ellipsoid projection process. In this way, various errors caused by the influence of projection conditions in the process of projecting the observed values ​​to the plane cannot be avoided, which in turn will bring errors to the calculation of the engineering surface area. [0003] At present, there are many methods for calculating the surface area of ​​irregular terrain. The more commonly used methods at home and abroad include: c...

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, an engineering surface measurement method based on ellipsoid calculation provided by the present invention is suitable for engineering surface area calculation with large areas or large terrain fluctuations, and solves the problem of projecting measured observation values ​​to The surface area is calculated on the plane, and the projection of the measured observation value to the plane will cause a projection error, which will affect the calculation of the engineering surface area.

Images