[R-sig-Geo] anisotropy

[Dave Depew]

Hi All,
I suppose this is a rather simple question...however, I'm managing to 
get more confused the more I read.
I'm doing some OK and UK using the R-gstat package...I have some data 
that is moderately anisotropic. Reading the gstat literature, it would 
seem that to specify the appropriate parameters for anisotropic 
variograms I need the set the angle equal to the direction of maximal  
data continuity? or maximal range?. The ratio of the minimum to maximum 
range appears to be straightforward enough, but the first part is 
confusing me.
As an example;
data(meuse)
 e<-variogram(dist~1, loc=~x+y,data=meuse, alpha=c(0,45,90,135))
plot(e)

Looks to me anyways, that the direction of maximum range is 45 deg, and 
the minRange/maxRange is ~ 1000/1500 = 0.67.

Could more experienced gstat users tell me if I'm out to lunch on this one??

Thanks,