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> # show that extract with exact=TRUE equals st_interpolate_aw(), only much faster
> options(digits=15)
> suppressPackageStartupMessages(library(stars))
> L = st_as_stars(L7_ETMs)[,,,1]
> set.seed(123432)
> st_bbox(L) |> 
+   st_as_sfc() |> 
+   st_centroid() |> 
+   st_buffer(50) |>
+   st_sample(10) |> 
+   st_combine() |> 
+   st_convex_hull() -> ch
> if (interactive()) {
+  plot(L, reset = FALSE)
+  plot(ch, add = TRUE, border = 'red', col = NA)
+ }
> if (FALSE) {
+ e = st_extract(L, ch)[[1]]
+ a = aggregate(L, ch, mean)[[1]]
+ identical(e, a) # same code path
+ ee = aggregate(L, ch, mean, exact = TRUE)[[1]]
+ all.equal(e, ee)
+ aw = suppressWarnings(st_interpolate_aw(L, ch, extensive = FALSE)$V1)
+ all.equal(as.vector(ee), aw)
+ ee0 = st_extract(L, ch, exact = TRUE)[[1]]
+ all.equal(ee0, ee) # ??
+ }
> 
> proc.time()
   user  system elapsed 
   0.67    0.20    0.81