I have a building box 3d model create from ketchup
How to I export feature include geometry is bottom face of model and propety is height of model from a 3d model?
The feature template
"type": "Feature",
"properties": {},
"geometry": {
"type": "Polygon",
"coordinates": [
[
[
y,
x
],
[
y,
x
]
]
]
}