sighting_distance: Calculate sighting distance

In ericmkeen/suRvey: Data Entry App for Wildlife Surveys

Calculate sighting distance

Description

Calculate sighting distance

Usage

sighting_distance(
  platform_height,
  km_ref,
  reticles,
  degrees_per_reticle = 0.279,
  R = 6364.5
)

Arguments

platform_height	Height, in meters, of observation deck (or eye height, if possible) above sea level.
km_ref	The distance, in kilometers, to the boundary used as a reference for reticles (horizon or a distant shoreline).
reticles	Reticle reading.
degrees_per_reticle	The degrees represented by each full reticle.
R	Radius of the earth, in kilometers (default is R at latitude 53 degrees).

Value

The distance to the sighting, in km.

ericmkeen/suRvey documentation built on Feb. 5, 2025, 7:44 a.m.