Digital-watermark-based vector geographic data updating method

Abstract

The invention discloses a digital-watermark-based vector geographic data updating method. According to the method, in a vector geographic data updating process, a data management department embeds dissemination information (comprising copyright information, user information, acquisition time and the like) into raw data as watermark information; the watermark information is inseparable from the data in the updating process of a production department, so that an examination department can judge whether the data updated by the production department is the latest data or not according to the watermark information when the data is submitted to the examination department; and after the data updated by the production department is determined to be the latest data, watermarks are removed from the submitted accepted data according to the raw data to obtain data to be input into a database. By the method, legal data use and data direction control can be effectively realized, and the latest transmitted data is ensured to be always used for update and submission in updating operation.

Description

technical field [0001] The invention belongs to the field of geographic information copyright protection, and is a method specifically related to digital watermark updating, which can ensure the legal use and flow monitoring of data in the update process of vector geographic data, and ensure that the latest data is always used for update in the update operation , hand in. Background technique [0002] Vector geographic data is national basic data, especially large-scale data, and its use involves national information security. Therefore, it is very important to ensure the security of vector geographic data in the process of automatically and efficiently updating vector geographic data. [0003] At present, the research on the update of vector geographic data mainly focuses on quality control such as update methods and accuracy. Few people care about the security issues during the data update process. In the update process of vector geographic data, the safety of data use s...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to address the lack of effective means to ensure the legal use and flow monitoring of vector geographic data in the current update process of vector geographic data in our country. Digital watermarking technology introduces the update process of vector geographic data, which can effectively control the legal use and flow of data, and ensure that the latest data is always used for update and submission in the update operation.

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