Last data update: 2014.03.03

 R: Convex hull polygon
lawn_convexR Documentation

Convex hull polygon

Description

Takes a set of data-Point's and returns a convex hull polygon. Internally, this uses the convex-hull module that implements a Monotone chain hull

Usage

lawn_convex(input, lint = FALSE)

Arguments

input

input points in a data-FeatureCollection

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

data-Polygon a convex hull

See Also

Other transformations: lawn_bezier, lawn_buffer, lawn_concave, lawn_erase, lawn_intersect, lawn_merge, lawn_simplify, lawn_union

Examples

points <- '{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "Point",
        "coordinates": [-63.601226, 44.642643]
      }
    }, {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "Point",
        "coordinates": [-63.591442, 44.651436]
      }
    }, {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "Point",
        "coordinates": [-63.580799, 44.648749]
      }
    }, {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "Point",
        "coordinates": [-63.573589, 44.641788]
      }
    }, {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "Point",
        "coordinates": [-63.587665, 44.64533]
      }
    }, {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "Point",
        "coordinates": [-63.595218, 44.64765]
      }
    }
    ]
}'
lawn_convex(points)

Results


Created & Maintained by Osamu Ogasawara (osamu.ogasawara@gmail.com) and IMSBIO