diff --git a/misc/estimateAWC-vs-ROSETTA-centroids.R b/misc/estimateAWC-vs-ROSETTA-centroids.R
new file mode 100644
index 000000000..902d6a9c0
--- /dev/null
+++ b/misc/estimateAWC-vs-ROSETTA-centroids.R
@@ -0,0 +1,59 @@
+library(aqp)
+library(soilDB)
+library(lattice)
+library(tactile)
+
+data("ROSETTA.centroids")
+
+x <- ROSETTA.centroids
+
+# hmm.. why does this give NA?
+estimateAWC('si', omcl = 1)
+
+
+m <- data.frame(
+  names = SoilTextureLevels(which = 'names'),
+  codes = SoilTextureLevels(which = 'codes')
+)
+
+idx <- match(x$texture, m$names)
+x$txtcl <- m$codes[idx]
+
+
+x$est.awc <- estimateAWC(x$txtcl, omcl = rep(1, times = nrow(x)))
+
+
+xyplot(
+  est.awc ~ awc, 
+  data = x, 
+  xlim = c(-0.025, 0.23),
+  ylim = c(-0.025, 0.23),
+  xlab = 'AWC via ROSETTA Centroids',
+  ylab = 'Estimated AWC',
+  par.settings = tactile.theme(), 
+  asp = 1, 
+  scales = list(alternating = 3, tick.number = 10), 
+  pch = 16,
+  panel = function(...) {
+    panel.grid(-1, -1)
+    panel.xyplot(...)
+    panel.text(x = x$awc, y = x$est.awc, labels = x$texture, cex = 0.75 , pos = 1)
+    panel.abline(lm(est.awc ~ awc, data = x))
+  })
+
+
+
+x$diff <- with(x, awc - est.awc)
+
+dotplot(
+  texture ~ diff, 
+  data = x, 
+  xlab = 'ROSETTA AWC - Estimated AWC',
+  par.settings = tactile.theme(), 
+  cex = 1.5,
+  panel = function(...) {
+    panel.abline(v = 0, lty = 2)
+    panel.dotplot(...)
+  })
+
+