A three-tier statistical approach to verifying suspected copying of spatial data

Shuk Ching Lilian Cheng, Zhilin Li

Research output: Journal article publicationJournal articleAcademic researchpeer-review


Spatial data copyright and security have become very important issues in geo-information technology. Digital watermarking has been developed to protect the copyright of the data. Current researches are concentrated on raster image data and only little research on geo-referenced spatial data in vector format has been conducted. However, vector is still the most important data format for geo-information and this research is concentrated on vector data. Watermarking vector data means to add/ delete or modify some features. However, a slight change resulting from data generalization or compression may corrupt the watermarks. Therefore, this paper aims to propose a simple but rather effective statistical testing approach to recognise and record suspected infringement of data copyright. This approach has proved to be effective according to the results from a number of experimental tests.
Original languageEnglish
Pages (from-to)318-327
Number of pages10
JournalSurvey Review
Issue number310
Publication statusPublished - 1 Dec 2008


  • Copyright
  • Digital watermaking
  • Infringement
  • Spatial data
  • Vector data

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)
  • Computers in Earth Sciences
  • Civil and Structural Engineering


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