Profile End Point — profile_points • geoprofiler

Create a end point along a profile line starting at a point with a defined direction and length.

Usage

profile_points(
  start,
  profile.azimuth,
  profile.length,
  crs = st_crs(start),
  return.sf = TRUE
)

Arguments

start: sf point object.
profile.azimuth: numeric or units object. Direction of profile in degrees if numeric.
profile.length: numeric or units object.
crs: Coordinate reference system. Should be parsed by sf::st_crs().
return.sf: logical. Should the profile points be returned as a sf object (TRUE, the default) object or as a data.frame.

Value

class depends on return.sf.

Note

Use metric values (meters, kilometers, etc) in case of a projected coordinate reference frame, and degree when geographical coordinate reference frame.

Examples

p1 <- data.frame(lon = -90.8, lat = 48.6) |>
  sf::st_as_sf(coords = c("lon", "lat"), crs = "WGS84")
profile_points(p1,
  profile.azimuth = 135, profile.length = units::set_units(10, "km"),
  crs = sf::st_crs("EPSG:26915")
)
#> Simple feature collection with 2 features and 0 fields
#> Geometry type: POINT
#> Dimension:     XY
#> Bounding box:  xmin: 662193.2 ymin: 5378256 xmax: 669264.3 ymax: 5385328
#> Projected CRS: NAD83 / UTM zone 15N
#>                   geometry
#> 1 POINT (662193.2 5385328)
#> 2 POINT (669264.3 5378256)