A Rigorous Method of 3D Adjustment for Intersecting Networks of Free Stations and Corners

Abstract

The invention relates to a rigorous three-dimensional adjustment method for an edge-angle intersection net of a free observation station. An adjustment method based on a mathematic model not considering influence of vertical deflection only can be suitable for a measurement control net with a little vertical deflection change in a small range; and an adjustment method based on a mathematic model considering the influence of the vertical deflection does not consider the problem of unparallel real north directions in different longitude positions and cannot be suitable for a measurement control net with a relatively large longitude span. According to the method, rotary angles phi, omega and k of rotating three-dimensional spatial coordinates (x,y,z) of a measurement instrument during observation and x, y and z axes of an independent coordinate system of the observation station to be in a direction parallel to X, Y and Z axes of a three-dimensional adjustment reference coordinate system serve as unknown parameters to participate in adjustment; the influence of unparallel vertical lines among different positions on the earth and unparallel real north directions in the different longitude positions is considered; and the method can be suitable for three-dimensional adjustment of the edge-angle intersection net of any free observation station, and is more rigorous and reasonable.

Description

technical field [0001] The invention relates to the technical field of survey control network data processing, in particular to a precise three-dimensional adjustment method for a free survey station corner intersection network. Background technique [0002] In the traditional survey control network, the two-dimensional planar network adjustment is generally used to establish the planar control network by using the observations of the total station. In addition, the one-dimensional elevation network adjustment is carried out by using the observation value of the level instrument to establish the elevation control network. Finally, the two-dimensional planar control network and the one-dimensional elevation control network serve the project construction together, but the observation values ​​of the total station are spatial measurement values, and theoretically it is possible to directly establish a three-dimensional control network. [0003] As we all know, the data process...

AI Technical Summary

Problems solved by technology

The adjustment method based on the mathematical model without considering the influence of the vertical deviation can only be applied to the survey control network with little change in the vertical deviation in a small range; the adjustment method based on the mathematical model considering the influence of the vertical deviation is in essence considering the The influence of non-parallel vertical lines between different positions can be applied to measurement control networks with large latitude spans and large vertical line deviation changes, but it cannot be applied to longitude spans because the problem of non-parallel true north directions at different longitude positions is not considered. Larger measurement control network

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