geo_nearest: Calculate nearest point to a reference point

In ropenscilabs/geoops: 'GeoJSON' Topology Calculations and Operations

Description

Takes a reference Point and a FeatureCollection of Features with Point geometries and returns the point from the FeatureCollection closest to the reference. This calculation is geodesic.

Usage

geo_nearest(target_point, points)

Arguments

target_point	the reference point Feature<Point>
points	against input point set FeatureCollection<Point>

Value

A Feature<Point> the closest point in the set to the reference point

Examples

point1 <- '{
  "type": "Feature",
  "properties": {
     "marker-color": "#0f0"
   },
  "geometry": {
     "type": "Point",
     "coordinates": [28.965797, 41.010086]
  }
}'

points <- '{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "Point",
        "coordinates": [28.973865, 41.011122]
      }
    }, {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "Point",
        "coordinates": [28.948459, 41.024204]
      }
    }, {
      "type": "Feature",
      "properties": {},
      "geometry": {
        "type": "Point",
        "coordinates": [28.938674, 41.013324]
      }
    }
  ]
}'

geo_nearest(point1, points)

ropenscilabs/geoops documentation built on Jan. 1, 2021, 4:03 p.m.