A virtual coordinate generation method

Abstract

The invention discloses a virtual coordinate generation method, which comprises the following steps: 1. Determining a surveying and mapping working area and judging a shape; when the area is a planararea, entering the step 2; when the area is a band area, entering the step 3; 2, determining that edge line of the planar area, determining the control point of the survey area along the edge line ofthe planar area, forming a survey area control point table, selecting the minimum coordinate elevation point and the maximum coordinate elevation point in the survey area control point table, determining the generation area of the virtual control point, and randomly generating a certain number of virtual control points; 3, determining that centerline of the belt-shaped area, determining the control point of the survey area along the centerline of the belt-shaped area, forming a control point table of the survey area, determining the generation area of the virtual control point, and randomly generating a certain numb of virtual control points; Step 4, composing all the generated virtual control points into a virtual control point table. The invention has the beneficial effect that the network transmission of the secret coordinates and other secret surveying and mapping results is not affected under the condition that the real coordinate achievement table does not exist.

Description

technical field [0001] The invention relates to the technical fields of pipeline construction information security and surveying and mapping, in particular to a method for generating virtual coordinates. Background technique [0002] For the network transmission of confidential coordinates and other confidential surveying and mapping data files, the main method currently used is manual acquisition and transmission. The disadvantage of this transmission method is that the transmission speed is slow, the cost is high, real-time transmission cannot be realized, and files are prone to loss, damage and Theft and leakage, and cannot meet the needs of intelligent pipeline construction. At present, there is a method of using the surveying and mapping control point results table to generate an encryption password to encrypt the surveying and mapping results. For the transmission of coordinates, the relative relationship between the control points in the surveying and mapping control ...

AI Technical Summary

Problems solved by technology

But this method has certain limitations, that is, there is no result table of surveying and mapping control points in the early stage of control survey, even in the later stage of surveying and mapping, the number of control points is very small, and the confidentiality effect is not good

That is, the transfer of confidential coordinates by the network cannot be achieved or does not work well without the control measurement being completed and passed on to the relevant parties

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