[STATSGRASS] spatial autocorrelation

[Trevor Wiens]

I've reviewed some of the documentation about accounting for spatial autocorrelation in GRASS and came across an interesting statement in the McCauley Spatial Autocorrelation GRASS Tutorial. 

"If data are measured on a nominal scale, then the join count statistic is used."

I'm using logistic regression to model bird distributions. We reduced our count data to use / availability because there were insufficient data to model abundance. The data was transect gathered. I've avoided the use of a spatial autocorrelate and a trend surface, because this necessitates knowing where things are in order to predict them. If I understand the above statement, the use of Geary's C or Moran's I are thus inappropriate because they are interval / ratio based statistics.

In the point counts along transects, how does one measure a joint count statistic?

T
-- 
Trevor Wiens 
twiens at interbaun.com

The significant problems that we face cannot be solved at the same 
level of thinking we were at when we created them. 
(Albert Einstein)