Stonn — Federated Civil Viewer

FEDERATED CIVIL VIEWER · v0.7.0

Every layer of the ground, in one viewer.

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.

Native formats: 4read · write
Largest scene tested: 4.2Btris
Survey teams shipping with it: 340+worldwide

Stonn — federated civil viewer showing terrain, parcels and infrastructure in one scene

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.

A federated viewer means every team draws on the same ground.

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

Civil layers federated into a single scene

One scene, every source.

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

Level-of-detail tile streaming

Sites that don't fit in memory.

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

Federated source files bundled into a single SFF

The whole federation in a single file.

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

A viewer that thinks in stations, alignments, and parcels — not generic 3D.

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.

Read native, federate native, never export.

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.

SURFACE · TERRAIN

.xmlLandXML 1.0 – 2.0 — TIN surfaces, parcels, alignments, profiles · 2.0 textured meshesnative

BIM · GIS · VECTOR

.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

Bring every layer of the site onto the same drawing.

Free for individuals and small teams. Self-hosted federated server for enterprise. Open file readers, open coordinate systems, no lock-in.