FEDERATED CIVIL VIEWER · v0.7.0
Stonn opens LandXML surfaces, IFC 4.3 infrastructure, GeoJSON parcels and TopoJSON boundaries in a single federated scene — no conversions, no plug-in chains, no licence dance.
Open everything.Native readers for civil, BIM, GIS and survey data.
LandXML .xml IFC 4.3 .ifc GeoJSON .geojson TopoJSON .topojson
No conversion. No data loss.
Stop exporting, re-projecting, and emailing screenshots. Stonn holds your surfaces, structures, parcels and utilities in one coordinate system and one scene — read directly from each source format.
001 / FEDERATE
Drop a LandXML surface, an IFC 4.3 bridge, a GeoJSON parcel set and a TopoJSON boundary layer into the same viewer. They snap to a common CRS automatically and stay live-linked to their source files.
Live source linking4 native formats
002 / STREAM
Even multi-gigabyte IFC infrastructure models and dense LandXML TIN surfaces stay responsive. Stonn streams from disk at level-of-detail so the smallest detail and the entire site both stay interactive.
Out-of-core streamingLOD scene graph
003 / PORTABLE
A Stonn Federated File (.sff) packages every source — LandXML surfaces, IFC 4.3 models, GeoJSON parcels, TopoJSON boundaries — alongside the coordinate setup and the project state into one portable bundle. Hand off the full site as a single file: no missing layers, no broken relative paths, no licence dance.
Stonn Federated File.sff
Civil-native object model. Click an alignment to see chainage. Click a parcel to see attributes. Click a pipe to see invert depths. No translation layer.
Every format Stonn supports is parsed in its own runtime. No proxy formats, no Esri-to-CAD-to-IFC chains. What you opened is what you see.
.xmlLandXML 1.0 – 2.0 — TIN surfaces, parcels, alignments, profiles · 2.0 textured meshesnative
.ifcIFC 4.3 — full schema, property sets, structural & infranative
.geojsonRFC 7946 — Feature collections, attributes preservednative
.topojsonTopology-preserving GeoJSON — shared edges, smaller filesnative
✦ Available for macOS · Windows · Linux · WebGL
Free for individuals and small teams. Self-hosted federated server for enterprise. Open file readers, open coordinate systems, no lock-in.
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