Configure an initial viewpoint that shows the point cloud nature of this demo

[EricBoix]

The current initial viewpoint, as illustrated below, doesn't show the nature of
the data displayed (a non expert can even believe that what is shown in only a bitmapped terrain)

In order to better illustrate the point cloud nature of the terrrain, change the default viewpoint to adopt a closer view as illustrated e.g. below

Maybe try something like

"camera": {
    "position": {
      "x": "1842258.906522941",
      "y": "5175805.233629481",
      "range": "900",
      "heading": "-100",
      "tilt": "17"
    }
  },

Even better, toggle out the default planar view (that shows the terrain). The visual result should be something
like