On Mon, 10 Jan 2005, David Stinchcomb wrote: > Mark: > > This is a common concern with health data. The reference below has a > good discussion of the issues and survey of possible methods. Much > depends on what operations you wish to perform on the masked data.
There was an interesting paper at the AAG last year by Michael Leitner: Leitner M. and A. Curtis (2004) Cartographic Guidelines for Geographically Masking the Location of Confidential Point Data. Cartographic Perspectives, No. 49, Fall 2004 (in press). Roger Bivand > > -- Dave Stinchcomb > > Armstrong MP, Rushton G, Zimmerman DL. 1999. Geographically Masking > Health Data to Preserve Confidentiality. Statistics in Medicine 18:497-525. > > ============= > Mark Coleman wrote: > > > Greetings, > > > > I am exploring a research idea which will make use of a proprietary > > set of data on a large number of individual commercial buildings. Due > > to restrictions imposed by the organization that collects this data, > > information will not be distributed if it allows for the > > identification of the individual properties. Thus one can obtain data > > on aggregations of the data, but the individual data points > > themselves. The exception is that data can be released if it is > > sufficiently "masked", thus ensuring the confidentiality of the > > specific data points. > > > > I have developed what I consider an interesting hypothesis I wish to > > test using this data; one that requires the use of spatial techniques > > and hence some sort of specific geographic identifier (the raw data > > contains lat-long coordinates). Given this, is there some sort of > > mathematical translation one can perform on conventional lat-long > > coordinates that will disguise the true location of the underlying > > data, yet preserve the spatial characteristics of the data? > > > > Thanks, > > > > -Mark > > > > > > > > -- Roger Bivand Economic Geography Section, Department of Economics, Norwegian School of Economics and Business Administration, Breiviksveien 40, N-5045 Bergen, Norway. voice: +47 55 95 93 55; fax +47 55 95 93 93 e-mail: [EMAIL PROTECTED]
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