turf-sandbox snippet

script.turf-sandbox

// simply return a valid GeoJSON and it will be rendered on the map

const poly1 = turf.polygon([[
[49.462728907250906, 32.03540626913309],
[49.43353833374158, 31.99601467698813],
[49.414854634751144, 32.03060880303383],
[49.40926600401516, 31.998867206275463],
[49.36541223268354, 32.06928189843893],
[49.4083992948085, 32.13303532451391],
[49.462728907250906, 32.03540626913309],
]],
 {stroke: 'blue', fill: 'blue', 'fill-opacity': 0.3, 'stroke-width': 2}
);


const poly2 = turf.polygon([[
[49.24136234816716, 31.863340884447098],
[49.22462075975919, 31.833318583667282],
[49.20040909648348, 31.86852157115936],
[49.203111744950746, 31.9387686252594],
[49.23448994162803, 31.94364957511425],
[49.24136234816716, 31.863340884447098],
]],
  {stroke: 'blue', fill: 'blue', 'fill-opacity': 0.3, 'stroke-width': 2}
);


const poly3 = turf.polygon(
[[
[48.13998183965103, 33.568177074193954],
[48.11256172127216, 33.465478643774986],
[48.06998415445941, 33.48885141313076],
[48.05255544955855, 33.464987464249134],
[48.060517859632476, 33.38402800261974],
[47.99290166965593, 33.42316813766956],
[47.92982293287458, 33.370756432414055],
[47.88709444387379, 33.248226419091225],
[47.88424459366558, 33.3445505797863],
[47.81532609062384, 33.33251014351845],
[47.87616927900448, 33.46778869628906],
[47.95971208927601, 33.45645636320114],
[48.13998183965103, 33.568177074193954],
]],
  {stroke: 'blue', fill: 'blue', 'fill-opacity': 0.3, 'stroke-width': 2}
);

const turfPoint = turf.point([49.26776779628557, 33.19880034774542],
{'marker-symbol': 'rocket', 'marker-color': '#F00', 'marker-size': 'large'}) //this is "A" marker coordinates

let nearestPoint = null
let minDistanceKm = null

const getClosestPointToPolygon = (arrayOfPoly) => {
  arrayOfPoly.map(turfPolygon => {
    const distanceKm = turf.pointToLineDistance(turfPoint, turf.polygonToLine(turfPolygon))
    if (!!!minDistanceKm || minDistanceKm > distanceKm) {
      minDistanceKm = distanceKm
      nearestPoint = turf.nearestPointOnLine(turf.polygonToLine(turfPolygon), turfPoint)
     }
  })
  return nearestPoint
}

const closestPoint = getClosestPointToPolygon([poly1,poly2,poly3])
console.log(minDistanceKm)

return turf.featureCollection([poly1, poly2, poly3, turfPoint, closestPoint]);