Setting geofencing from coordinate 41.7523,12.8629

Question

cant find scala code to find the list of coordinates which comes with in 1 mile distance from a particular coordinates 41.7523,12.8629.

how can we geofencing for above given coordinate (spark scala)

what do you mean by "the code is not working"? do you get an error? do you get wrong answer? Please describe the output you get. — Yaron, Aug 06 '18 at 07:03

RAGHHURAAMM · Answer 1 · 2018-08-06T12:27:44.570

Using this function we can get one nearby point randomly within one mile radius:

 def getPoints(xc:Double,yc:Double,radiusInMiles:Int)={
  val ran = new scala.util.Random()
  val conv = 1609.344
  //Here, there are about 111,300 meters in a degree
  val radiusIndeg = radiusInMiles*conv / 111300f;
  val u = ran.nextDouble()
  val v = ran.nextDouble()
  val w = radiusIndeg*Math.sqrt(u)
  val t = 2*Math.PI*v
  val x = w*Math.cos(t)
  val y = w*Math.sin(t)
  val newX = x/Math.cos(Math.toRadians(yc))
  val fLong = newX+xc
  val fLat  = y+yc
    (fLong,fLat)
 }

By calling the above function repeatedly in a for loop, we can get desired number of random points within 1 mile:

for(i<-1 to 30) yield getPoints(41.7523,12.8629,1)

To get 30 nearby points randomly,

In Scala REPL:
scala> for(i<-1 to 30) yield getPoints(41.7523,12.8629,1)
res25: scala.collection.immutable.IndexedSeq[(Double, Double)] = Vector((41.74982541032955,12.86481315224305), (41.754168266
959056,12.870364411375881), (41.75544877222746,12.85451037482713), (41.7612335738966,12.856539452781801), (41.76358834447362
,12.861061408964183), (41.763040037484664,12.867369860689339), (41.75110057115767,12.873299266989251), (41.74658541773817,12
.865223104625423), (41.74925109768552,12.868277572490877), (41.76504777008776,12.86109583406441), (41.75732730141462,12.8722
5307703036), (41.75762735062798,12.860633801016085), (41.75003276741254,12.856383089176347), (41.760707286583,12.85341268512
5267), (41.748073299368386,12.858209316913472), (41.76018412949083,12.866118423321987), (41.74213603200559,12.87308644848186
), (41.761324688000265,12.86506896052553), (41.749976...
scala> res25.foreach(println)
(41.74982541032955,12.86481315224305)
(41.754168266959056,12.870364411375881)
(41.75544877222746,12.85451037482713)
(41.7612335738966,12.856539452781801)
(41.76358834447362,12.861061408964183)
(41.763040037484664,12.867369860689339)
(41.75110057115767,12.873299266989251)
(41.74658541773817,12.865223104625423)
(41.74925109768552,12.868277572490877)
(41.76504777008776,12.86109583406441)
(41.75732730141462,12.87225307703036)
(41.75762735062798,12.860633801016085)
(41.75003276741254,12.856383089176347)
(41.760707286583,12.853412685125267)
(41.748073299368386,12.858209316913472)
(41.76018412949083,12.866118423321987)
(41.74213603200559,12.87308644848186)
(41.761324688000265,12.86506896052553)
(41.74997668526327,12.86038167090363)
(41.75228048449065,12.872686927175733)
(41.75972428137232,12.859596070561539)
(41.7562836928502,12.86187286720154)
(41.75715996439461,12.861374766455278)
(41.760604332388,12.867977103427238)
(41.74018421174905,12.865172431590485)
(41.74059829855585,12.86438943748021)
(41.7593627526156,12.873744103200057)
(41.747241804657264,12.8542871167178)
(41.76014663643563,12.858456116302811)
(41.740826160697715,12.867433800624394)

scala>

how we can get all the coordinates instead of 30 within one mile radius? — Sheryl Brooke, Aug 23 '18 at 06:25
How can one get all points? There will be infinite in number? You must fix a number first and you can find that many co-ordinates. — RAGHHURAAMM, Aug 23 '18 at 06:30
Just replace the number 30 in for loop with the desired number of co-ordinates. — RAGHHURAAMM, Aug 23 '18 at 06:31
i want all coordinates that comes under one mile .. i donot know how many it will come ? — Sheryl Brooke, Aug 23 '18 at 06:40

Setting geofencing from coordinate 41.7523,12.8629

1 Answers1