Radial basis function based GIS (Geographic Information System) vector data reversible decryption method

Abstract

The invention discloses a radial basis function based GIS (Geographic Information System) vector data reversible decryption method. The radial basis function based GIS vector data reversible decryption method comprises step 1, the decryption processing process for GIS vector data, wherein the decryption processing process comprises control point selection, decryption transformation parameter generation and secret key saving; step 2, the decryption processing process for vector data, wherein the decryption processing process comprises secret key reading, original vector data decryption processing and the like; step 3, the recovery processing process for the decrypted vector data, wherein the recovery processing process comprises key reading, decrypted vector data recovery and the like. The radial basis function based GIS vector data reversible decryption method is gradual, safe, reversible and the like and suitable for the characteristic point based GIS vector data decryption and can be applied to the public release of the GIS vector data.

Description

technical field [0001] The invention belongs to the field of geographic information security, and in particular relates to a reversible decryption method for GIS vector data based on a radial basis function. Background technique [0002] "Regulations on the Scope of State Secrets in Surveying and Mapping Management", "Supplementary Regulations on the Display of Public Map Contents (Trial)" and "Regulations on the Public Display of Basic Geographic Information (Trial)" on the restrictions and confidentiality of public maps and geographic information Provisions have been made, and special emphasis has been placed on the confidentiality of the spatial location accuracy of basic geographic information and related elements. [0003] Ordinary facilities and sensitive facilities have different point accuracy index requirements. In the practice of decryption, the method of selecting control points is generally used for decryption. Usually, the water system, the intersection of roa...

AI Technical Summary

Problems solved by technology

The adjacent blocks of the block transformation model are transformed by different transformation parameters. Although the function is continuous at the edge, the first-order derivative is discontinuous, which makes the deformation not smooth.

Casado [5] It is proposed to maintain the topological relationship by adding a large number of control points, but it will cause difficulties in interpolation and solution

The block transformation model has high confidentiality and meets the precise transformation characteristics, but the deformation is not smooth and continuous

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