Untitled

<!DOCTYPE html>
<html>

<head>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
  <meta name="viewport" content="initial-scale=1, maximum-scale=1, user-scalable=no">
  <title>Create circles</title>
  <link rel="stylesheet" href="https://js.arcgis.com/3.17/esri/css/esri.css">
  <style>
    html,
    body,
    #map {
      height: 100%;
      width: 100%;
      margin: 0;
      padding: 0;
    }

    #controls {
      background: #fff;
      box-shadow: 0 6px 6px -6px #999;
      color: #444;
      font-family: sans-serif;
      height: auto;
      left: 1em;
      padding: 1em;
      position: absolute;
      top: 1em;
      width: auto;
      z-index: 40;
    }

    #controls div {
      padding: 0 0 1em 0;
    }
  </style>

  <script src="https://js.arcgis.com/3.17compact"></script>
  <script type="text/javascript" src="test.json"></script>
  <!-- <script src="skrypt.js"></script> -->
  <script>
    var map;

var actual_JSON;
function loadJSON(file, callback) {

    var xobj = new XMLHttpRequest();
    xobj.overrideMimeType("application/json");
    xobj.open('GET', file, true); // Replace 'my_data' with the path to your file
    xobj.onreadystatechange = function () {
          if (xobj.readyState == 4 && xobj.status == "200") {
            // Required use of an anonymous callback as .open will NOT return a value but simply returns undefined in asynchronous mode
            callback(xobj.responseText);
          }
    };
    xobj.send(null);
 }

function load() {

    loadJSON("test.json", function(response) {

        actual_JSON = JSON.parse(response);
        console.log(actual_JSON.y);
    });
}
load();

    require([
      "esri/map", "esri/geometry/Extent", "esri/symbols/SimpleFillSymbol",
      "esri/graphic", "esri/layers/GraphicsLayer", "esri/Color",
      "esri/SpatialReference", "dojo/domReady!"
    ], function(
      Map, Extent, SimpleFillSymbol,
      Graphic, GraphicsLayer, Color,
      SpatialReference
    ) {
      map = new Map("map", {
        basemap: "gray",
        center: [22.741, 51.39],
        slider: false,
        zoom: 2
      });
      map.on("load", mapLoaded);
      function mapLoaded() {
        var gLayer = new GraphicsLayer({
          opacity: 0.7
        });
        var ext;
        var g;
        var r;
        var b;
        map.addLayer(gLayer);
        var x=[];
        var t=[];
        var y=[];
        var dzielnik=4;//zmienna zmniejszajaca ilosc punktow na mapie
        var ilosc=actual_JSON.x*actual_JSON.y/dzielnik;
        for(var i=0;i<ilosc;i++){//20000->50000
            y.push(actual_JSON.XLONG[i]);
            x.push(actual_JSON.XLAT[i]);
            t.push(actual_JSON.T2[i]);
        }
        var maksymalna = Math.max.apply(null, t);
        var minimalna =  Math.min.apply(null, t);
        var licznik=maksymalna-minimalna;
        for(var i=0;i<ilosc;i++){//20000->50000
        //ext = new Extent(x[i],y[i],x[i]+0.1,y[i]+0.1, new SpatialReference({wkid:4326})) ;//extent(xpoczatkowy, ypoczatkowy, xkoncowy, ykoncowy)
        r=Math.round(255*((t[i]-minimalna)/licznik));//wystosowanie koloru
        b=255-r;//wystosowanie koloru
        g = new Graphic(Extent(x[i],y[i],x[i]+0.1,y[i]+0.1, new SpatialReference({wkid:4326})), new SimpleFillSymbol(SimpleFillSymbol.STYLE_SOLID, null, new Color([r,0,b,1])));// kolor RGB
        gLayer.add(g);
        }
      }
    });
  </script>
</head>

<body>
  <div id="map"></div>
  </div>
</body>

</html>