const furkotElevation = require('furkot-elevation');

const elevation = furkotElevation(options);

const points = [
  [ lon, lat ] ,
  // ...
];

elevation(points, function(err, result) {
  // result is an Array of elevations in meters
  // elevation Array items corresponds to the items in points array 
  assert.equal(result.length, points.length);
});