function loadkriging() {
var canvas = document.getElementById("canvasMap");
canvas.width = 1000;
canvas.height = 1000;
var n = points.length;
var t = [];
var x = [];
var y = [];
for (var i = 0; i < n; i++) {
t.push(points[i].attributes.TN_);
x.push(points[i].geometry.x);
y.push(points[i].geometry.y);
L.circle([y[i], x[i]], {radius: 1}).addTo(map);
}
var variogram = kriging.train(t, x, y, "exponential", 0, 100);
 
var width = 0.0005;
var grid = kriging.grid(world, variogram, width);
var colors = ["#006837", "#1a9850", "#66bd63", "#a6d96a", "#d9ef8b", "#ffffbf",
"#fee08b", "#fdae61", "#f46d43", "#d73027", "#a50026"];
kriging.plot(canvas, grid, [121.75573509037618, 122.01776807642929], [39.18501934760944, 39.39127165938733], colors);
}