Variography + spatial structure

Question 1

Correlogram

Answer 1

shows semivariogram and covariance on 1 graph

shows correlation at different lags

Question 2

Correlation vs. variance

Answer 2

measure of similarity

measure of dissimilarity

Question 3

Crossplot

Answer 3

compares the values of all of the points in a dataset to other points within a specific distance

Question 4

Isotropy

Answer 4

equal affect in all directions

Question 5

Anisotropy

Answer 5

direction specific effect

Question 6

Nugget

Answer 6

shows semivariance at x = 0

Question 7

Sill

Answer 7

shows semivariance where it maxes or levels off

Question 8

Spatial lag

Answer 8

a specified distance which can change to show values at different distances

Question 9

Range

Answer 9

distance at which we believe spatial autocorrelation ceases to exist

lag distance (x) where semivariogram hits the sill

Question 10

Variogram

Answer 10

shows the variance at different lags