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PostGIS Cookbook. - Second Edition

You're reading from  PostGIS Cookbook. - Second Edition

Product type Book
Published in Mar 2018
Publisher
ISBN-13 9781788299329
Pages 584 pages
Edition 2nd Edition
Languages
Authors (6):
Paolo Corti Paolo Corti
Profile icon Paolo Corti
Pedro Wightman Pedro Wightman
Profile icon Pedro Wightman
Bborie Park Bborie Park
Profile icon Bborie Park
Stephen Vincent Mather Stephen Vincent Mather
Profile icon Stephen Vincent Mather
Thomas Kraft Thomas Kraft
Profile icon Thomas Kraft
Mayra Zurbarán Mayra Zurbarán
Profile icon Mayra Zurbarán
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Table of Contents (18) Chapters

Title Page
Packt Upsell
Contributors
Preface
1. Moving Data In and Out of PostGIS 2. Structures That Work 3. Working with Vector Data – The Basics 4. Working with Vector Data – Advanced Recipes 5. Working with Raster Data 6. Working with pgRouting 7. Into the Nth Dimension 8. PostGIS Programming 9. PostGIS and the Web 10. Maintenance, Optimization, and Performance Tuning 11. Using Desktop Clients 12. Introduction to Location Privacy Protection Mechanisms 1. Other Books You May Enjoy Index

Adding noise to protect location data


Some of the mechanisms designed for location privacy protection are based on location obfuscation, which is explained in [5] as the means of deliberately degrading the quality of information about an individual's location in order to protect that individual's location privacy.

This is perhaps the simplest way to implement location privacy protection in LBISs because it has barely any impact on the server-side of the application, and is usually easy to implement on the client-side. Another way to implement it would be on the server-side, running periodically over the new data, or as a function applied to every new entry.

The main goal of these techniques is to add random noise to the original location obtained by the cellphone or any other location-aware device, so as to reduce the accuracy of the data. In this case, the user can usually define the maximum and/or minimum amount of noise that they want to add. The higher the noise added, the lower the quality...

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