GeoJSON Profile

GeoJSON is useful for site interchange. It is not the internal ArchAI coordinate or geometry model.

Use GeoJSON for:

• Parcels.
• Zoning overlays.
• Neighboring plots.
• Roads and paths.
• Site context.
• Web map overlays.

Do not use GeoJSON for:

• Building-local coordinates.
• Millimeter-precise element geometry.
• Solids.
• Terrain TINs.
• Hosted openings.
• Parametric BIM relationships.

Export Rules

• Export RFC 7946 GeoJSON using WGS84 longitude/latitude unless a non-RFC profile is explicitly requested.
• Put ArchAI path, ID, and kind in feature properties.
• Preserve source coordinate-space metadata as properties.
• Do not assume GeoJSON can round-trip all ArchAI semantics.

Parcel Feature

{
  "type": "Feature",
  "properties": {
    "archai:path": "site.main.parcels.pcl_001",
    "archai:id": "Parcel.PCL-001",
    "archai:kind": "parcel",
    "archai:sourceFrame": "site.main.frames.local"
  },
  "geometry": {
    "type": "Polygon",
    "coordinates": [
      [
        [8.5401, 47.3701],
        [8.5407, 47.3701],
        [8.5406, 47.3705],
        [8.5402, 47.3706],
        [8.5401, 47.3701]
      ]
    ]
  }
}

Import Rules

On import:

• Create or update site context layers, parcels, or zoning overlays.
• Store the original source artifact.
• Record source CRS assumptions.
• Convert coordinates into an ArchAI coordinate space.
• Preserve feature properties as metadata where useful.
• Emit warnings for ambiguous CRS, invalid polygons, or unsupported geometry.

Required Warnings

Warning	Meaning
geojson.crs_assumed_wgs84	Input had no explicit CRS and was treated as RFC 7946 WGS84
geojson.unsupported_geometry	Geometry type cannot map cleanly
geojson.invalid_polygon	Polygon is not closed or self-intersects
geojson.semantic_loss	Some ArchAI semantics cannot be represented
geojson.reprojected	Coordinates were transformed to or from WGS84