测绘通报 ›› 2017, Vol. 0 ›› Issue (10): 89-94.doi: 10.13474/j.cnki.11-2246.2017.0322

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A Reversible Decryption Model for Vector and Raster Integration Based on Trigonometric Function

YU Hui1,2, ZHOU Wei1,2, MA Xinnian1,2   

  1. 1. Ministry of Education Key Laboratory of Virtual Geographic Environment, Nanjing Normal University, Nanjing 210023, China;
    2. Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing 210023, China
  • Received:2017-01-12 Revised:2017-04-08 Online:2017-10-25 Published:2017-11-07

Abstract: Vector-raster geographic data are important part of basic geographic information data, hence the research on its security is very important. These data are open for share and use only when decrypted in terms of our country's relevant laws and regulations on decrypted geometric precision of public maps. Based on analysis of properties of description by trigonometric function, this paper devised a reversible description model for integrated vector-raster geographic data by trigonometric function with considering of the characteristics of stack use of these data. Experiments show that the model maintains well the topological relations of geographical entities with fast processing speed, high security, controlled error and good data connections.

Key words: vector-raster geographic data, decryption model, trigonometric function, decryption characteristic

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