Statistics of the elevation data across a swath profile.
Arguments
- x
list. The return object of
swath_profile()- profile.length
numeric or
unitsobject. IfNULLthe fractional distance is returned, i.e. 0 at start and 1 at the end of the profile.
Examples
# Create a random raster
r <- terra::rast(ncol = 10, nrow = 10, xmin = -150, xmax = -80, ymin = 20, ymax = 60)
terra::values(r) <- runif(terra::ncell(r))
# Create a random profile
profile <- data.frame(lon = c(-140, -90), lat = c(55, 25)) |>
sf::st_as_sf(coords = c("lon", "lat"), crs = "WGS84")
swath <- swath_profile(profile, r, k = 5, dist = 10)
#> Warning: no non-missing arguments to min; returning Inf
#> Warning: no non-missing arguments to min; returning Inf
#> Warning: no non-missing arguments to min; returning Inf
#> Warning: no non-missing arguments to min; returning Inf
#> Warning: no non-missing arguments to max; returning -Inf
#> Warning: no non-missing arguments to max; returning -Inf
#> Warning: no non-missing arguments to max; returning -Inf
#> Warning: no non-missing arguments to max; returning -Inf
swath_stats(swath, profile.length = profile_length(profile_line(profile)))
#> # A tibble: 16 × 9
#> distance elevation min quantile25 median quantile75 max mean sd
#> [m] <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl> <dbl>
#> 1 0 0.817 0.257 0.257 0.257 0.257 0.817 0.417 0.253
#> 2 349377. 0.718 0.381 0.381 0.487 0.655 0.792 0.575 0.164
#> 3 698755. 0.416 0.332 0.353 0.416 0.624 0.893 0.566 0.223
#> 4 1048132. 0.430 0.408 0.413 0.430 0.519 0.674 0.508 0.107
#> 5 1397509. 0.723 0.368 0.368 0.435 0.558 0.723 0.518 0.137
#> 6 1746887. 0.746 0.299 0.299 0.481 0.705 0.910 0.590 0.239
#> 7 2096264. 0.684 0.452 0.452 0.464 0.522 0.684 0.528 0.0910
#> 8 2445641. 0.676 0.382 0.416 0.517 0.581 0.676 0.535 0.108
#> 9 2795018. 0.287 0.287 0.349 0.536 0.573 0.637 0.502 0.133
#> 10 3144396. 0.770 0.497 0.505 0.530 0.602 0.832 0.614 0.133
#> 11 3493773. 0.722 0.254 0.300 0.439 0.574 0.722 0.490 0.172
#> 12 3843150. 0.495 0.313 0.322 0.350 0.496 0.735 0.461 0.156
#> 13 4192528. 0.487 0.274 0.274 0.381 0.585 0.697 0.484 0.178
#> 14 4541905. 0.370 0.363 0.363 0.363 0.369 0.702 0.449 0.146
#> 15 4891282. 0.482 0.482 0.482 0.482 0.482 0.712 0.548 0.104
#> 16 5240660. 0.502 0.502 0.502 0.502 0.502 0.502 0.502 0