Stonn
Opens LandXML, IFC 4.3, GeoJSON, and TopoJSON in a single federated scene, with live source linking, out-of-core streaming, and a portable .sff file format.
A federated civil viewer that opens LandXML surfaces, IFC 4.3 infrastructure, GeoJSON parcels, and TopoJSON boundaries in a single scene without conversions. It solves the problem of data silos and format incompatibility for surveyors, designers, and infrastructure teams. The product is positioned as a native-format viewer with out-of-core streaming and a portable file format, available as a free tier for individuals and small teams, with a self-hosted server for enterprises.
Key features
- Native readers for LandXML, IFC 4.3, GeoJSON, TopoJSON
- Federated scene with common coordinate system
- Live source linking
- Out-of-core streaming with level-of-detail
- Portable .sff file format
- Civil-native object model (chainage, parcels, invert depths)
- Supports 87 projections (EPSG:25830, WGS84, ETRS89, NAD83)
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ICP
- Engineering teams
- Data analytics teams
- Software developers