RE: [ai-geostats] why do negative kriging values occur

2005-11-14 Thread Gregoire Dubois
Negative kriging weights can occur when you have a so-called screening effect, that is points close to the location at which an estimation is needed mask points that are further appart. The problem is thus the topology of your sampling locations. Solution: reduce the neighborhood of your

RE: [ai-geostats] why do negative kriging values occur

2005-11-14 Thread Heuvelink, Gerard
- From: Gregoire Dubois [mailto:[EMAIL PROTECTED] Sent: maandag 14 november 2005 15:12 To: 'Abhijith Titus D'souza' Cc: ai-geostats@unil.ch Subject: RE: [ai-geostats] why do negative kriging values occur Negative kriging weights can occur when you have a so-called screening effect