Profile Coordinates

Project points on a cross section given by a starting point and the direction

Usage

profile_coords(x, profile, azimuth = NULL, drop.units = TRUE)

Arguments

x

'sf' object

profile

'sf' object of the profile or the profile's starting point.

azimuth

numeric. Direction (in degrees) emanating from starting point. Is ignored when profile contains two points or is a LINESTRING.

drop.units

logical. Whether the return should show the units or not.

Value

"tibble". X is the distance along the profile line. Y is the distance across the profile line. (units of X and Y depend on coordinate reference system).

Author

Tobias Stephan

Examples

data(locations_example)
p1 <- data.frame(lon = -90.8, lat = 48.6) |>
  sf::st_as_sf(coords = c("lon", "lat"), crs = "WGS84")
profile_crds <- profile_coords(locations_example, profile = p1, azimuth = 135)
head(profile_crds)
#> # A tibble: 6 × 2
#>        X        Y
#>    <dbl>    <dbl>
#> 1 0.0778  0.116  
#> 2 0.0450  0.0123 
#> 3 0.0369 -0.00996
#> 4 0.0397 -0.00690
#> 5 0.0383 -0.00885
#> 6 0.0335  0.00333

# Plot the transformed coordinates
plot(profile_crds)