Distance from plate boundary — distance_from

Absolute distance of data points from the nearest plate boundary in degree

Usage

distance_from_pb(x, PoR, pb, tangential = FALSE, km = FALSE, ...)

Arguments

x: sf or data.frame objects of the data.points in geographical coordinate system
PoR: Pole of Rotation. "data.frame" or object of class "euler.pole" containing the geographical coordinates of the Pole of Rotation
pb: sf objects of the plate boundary geometries in the geographical coordinate system
tangential: Logical. Whether the plate boundary is a tangential boundary (TRUE) or an inward and outward boundary (FALSE, the default).
km: Logical. Whether the distance is expressed in kilometers (TRUE) or in degrees (FALSE, the default).
...: optional arguments passed to smoothr::densify()

Value

Numeric vector of the great circle distances

Details

The distance to the plate boundary is the longitudinal or latitudinal difference between the data point and the plate boundary (along the closest latitude or longitude) for inward/outward or tangential plate boundaries, respectively.

References

Wdowinski, S. (1998). A theory of intraplate tectonics. Journal of Geophysical Research: Solid Earth, 103(3), 5037<U+2013>5059. http://dx.doi.org/10.1029/97JB03390

Examples

data("nuvel1")
na_pa <- subset(nuvel1, nuvel1$plate.rot == "na")

data("plates")
plate_boundary <- subset(plates, plates$pair == "na-pa")

data("san_andreas")
res <- distance_from_pb(
  x = san_andreas, PoR = na_pa, pb = plate_boundary, tangential = TRUE
)
head(res)
#> [1] -2.446542 -2.751949 -2.705483 -3.162091 -4.988116 -6.358818

res.km <- distance_from_pb(
  x = san_andreas, PoR = na_pa, pb = plate_boundary, tangential = TRUE, km = TRUE
)
range(res.km)
#> [1] -1025.9419   597.3071