Re: AI-GEOSTATS: coordinates units and semivariogram calculation

2008-04-13 Thread Gerald van den Boogaart
Dear Pedro, An isotropic variogram seams not adequat for your situation. Thus I would not bother for the different scales, but trying to fit an anisotropic variogramm with main axis parallel to x and y coordinate right away. The first step would be to estimate directional variogramms x and y d

AI-GEOSTATS: Re: coordinates units and semivariogram calculation

2008-04-13 Thread Isobel Clark
Pedro Why don't you work with the original co-ordinates? X in cm Y in metres. So long as you do not expect the semi-variogram to be isotropic, it does not matter what units you use. So long as you know, the computer does not need to! Isobel http://www.kriging.com Pedro Mardones <[E

AI-GEOSTATS: coordinates units and semivariogram calculation

2008-04-13 Thread Pedro Mardones
Dear list members; I would like to have any opinion (or suggestion) about the following situation. I have a collection of data points spatially arranged on a 12 by 11 grid where the horizontal axis was measured in cm at 1 cm intervals (from 1 to 12 cm) and the vertical axis was measured in meters