Model lies on its side and does not match map orientation

• The model appears flat on the ground after import.
• rotation.y no longer rotates the model around its vertical axis.
• The bounding box measures 12.4 by 3.1 by 18.6, showing the height sits on Z.

1. Compute the bounding box with Box3.setFromObject and compare axis sizes, since the tallest axis is the height.
2. Confirm the source convention: GIS ENU is Z-up with X east and Y north, while glTF is Y-up.
3. Check whether the code rotates the model itself instead of a wrapper group.
4. Check whether longitude and latitude are being used directly as x and y.
5. Check scale, because three.js units have no physical meaning unless the project defines them.

Wrap the model in a THREE.Group and set wrapper.rotation.x to -Math.PI/2 for Z-up to Y-up, apply heading on wrapper.rotation.y, and project coordinates onto a local metre plane using 111320 times cos(lat) metres per degree longitude and 110574 metres per degree latitude before setting position.

var box = new THREE.Box3().setFromObject(model);
var size = box.getSize(new THREE.Vector3());
console.log('尺寸', size.x, size.y, size.z);

var wrapper = new THREE.Group();
wrapper.add(model);
wrapper.rotation.x = -Math.PI / 2;      // Z-up 转 Y-up
wrapper.position.set(x, 0, z);
scene.add(wrapper);

• Rotating each asset's own geometry, after which later code can no longer work in the model's local axes.
• Converting half the models and leaving half untouched, producing a scene where some stand and some lie flat.