Turning an Estate Into an Interactive 3D Map: Our Charlton Park Demo

One of the demos on zko.world is an interactive 3D map of the Charlton Park estate. It is a small piece of work with a big question behind it: how do you let someone explore a large, varied place in a browser without turning it into a video game?

The first decision is what the map is for. An estate has farmland, an airfield, historic buildings and commercial businesses, and each visitor arrives with a different job. Someone checking where to park wants a different view from someone curious about the history. So we start by listing the five or six things a visitor actually needs to find, and we build the map around those rather than around everything we can model.

The second decision is how much to model. A 3D map that tries to be photographic becomes slow and cluttered. We prefer a clean, slightly simplified world where the buildings read clearly from a distance and the detail appears as you move closer. It keeps the file sizes sensible, and it means the map still works on a mid-range phone in a field with patchy signal.

Camera control matters more than most people expect. Free orbiting feels impressive for ten seconds and then leaves people lost. We tend to give a small set of designed viewpoints, with gentle transitions between them, and allow free movement only as an extra. Every viewpoint has a way back to the overview.

Labels and wayfinding do the real work. If a visitor cannot tell what a building is without clicking it, the map has failed. Names, short descriptions and clear categories should be visible at the right zoom level, not hidden in a panel.

Finally, we always ask whether the 3D is earning its place. A flat map is faster to load. The 3D version is justified when height, distance or the relationship between places is the point, as it is across an estate with buildings, open land and an airfield. If it is not, we say so and keep it flat.

You can try the demo from our demos page, and the wider estate work is in the Earl of Suffolk case study.