Considering Risk Locations When Defining Perturbation Zones for Geomasking
Considering Risk Locations When Defining Perturbation Zones for Geomasking
复制标题
定义地理掩蔽扰动区域时考虑风险位置
DOI：
10.3138/carto.47.3.1112
复制
发表时间：
2012
期刊：
影响因子：
--
通讯作者：
F. Zhan
中科院分区：
文献类型：
--
作者：
Yongmei Lu;C. Yorke;F. Zhan
ABSTRACT Geomasking techniques are commonly used to mask the true location information of cases by introducing noise into location data. This study seeks to improve the spatially adaptive random perturbation (SARP) geomasking method by using the actual distribution of the residential addresses (or “risk location”) rather than the people (or “risk population”) to define a perturbation zone. The procedure used in the study also employs a “donut-shaped” perturbation zone, rather than the traditional “pancake-shaped” zone, when displacing a case. The effectiveness of the proposed geomasking methods is assessed in terms of their potential to control for location re-engineering and their ability to maintain the point patterns embedded in the real distribution. The authors conclude that SARP geomasking using the distribution of actual street addresses protects privacy more effectively than geomasking based on population size; the different SARP techniques do not significantly change the clustering patterns on a ...
