[postgis-users] generating a random spatial offset

[Stephen Cameron]

Hello,

Is there a simple means of generating a random spatial offset (Vector?) 
for obfuscating the position of a point?

I imagine this offset could be stored in one spatial column and then 
added to a real point in another column to move its position by the offset.

Points for which no 'obfuscation' is needed would have a zero offset value.

Another means might be to reduce the horizontal accuracy of the point, 
this might be the simplest means if all points could be treated the same 
way, but this is not possible.


-- 
Regards

Stephen Cameron

Data Programmer
Integrated Marine Observing System  (IMOS)
eMarine Information Infrastructure Project
University of Tasmania, Private Bag 21, Hobart, TAS 7001, Australia

Tel: +61 3 6226 8507
Fax: +61 3 6226 2997
Email: stephen.cameron at utas.edu.au
URL: http://www.imos.org.au/eMII.html