lawn_destination: Calculate destination point

In ropensci/lawn: Client for 'Turfjs' for 'Geospatial' Analysis

Calculate destination point

Description

Takes a data-Point and calculates the location of a destination point given a distance in degrees, radians, miles, or kilometers; and bearing in degrees. Uses the Haversine formula (http://en.wikipedia.org/wiki/Haversine_formula) to account for global curvature.

Usage

lawn_destination(start, distance, bearing, units, lint = FALSE)

Arguments

start	Starting point, a data-Feature<data-Point>
distance	Distance from the starting point.
bearing	Ranging from -180 to 180.
units	Miles, kilometers, degrees, or radians.
lint	(logical) Lint or not. Uses geojsonhint. Takes up increasing time as the object to get linted increases in size, so probably use by default for small objects, but not for large if you know they are good geojson objects. Default: FALSE

Value

the calculated destination, a data-Feature<data-Point>

See Also

Other measurements: lawn_along(), lawn_area(), lawn_bbox_polygon(), lawn_bbox(), lawn_bearing(), lawn_center_of_mass(), lawn_center(), lawn_centroid(), lawn_distance(), lawn_envelope(), lawn_extent(), lawn_line_distance(), lawn_midpoint(), lawn_point_on_feature(), lawn_pt2line_distance(), lawn_square()

Examples

pt <- '{
  "type": "Feature",
  "properties": {
    "marker-color": "#0f0"
  },
  "geometry": {
    "type": "Point",
    "coordinates": [-75.343, 39.984]
  }
}'
lawn_destination(pt, 50, 90, "miles")
lawn_destination(pt, 100, 90, "miles")
lawn_destination(pt, 2, 45, "kilometers")
lawn_destination(pt, 2, 30, "degrees")
## Not run: 
pt %>% view
lawn_destination(pt, 200, 90, "miles") %>% view

## End(Not run)

ropensci/lawn documentation built on May 18, 2022, 9:58 a.m.