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Stonn, a federated civil/terrain viewer

Stonn, a federated civil/terrain viewer

by oscarcp·Jun 11, 2026·1 point·0 comments
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AI Analysis

●●●BangerWizardryBig BrainNiche Gem

Federates LandXML, IFC, and GeoJSON in one scene without format conversions or data loss.

Strengths
  • •Native format parsers eliminate conversion chains and preserve all source data
  • •Out-of-core streaming handles 4.2B triangle scenes at 20-30 fps on integrated graphics
  • •.sff federated file bundles entire project with coordinate setup into one portable package
Weaknesses
  • •Niche audience limits broader developer adoption outside civil/BIM domain
  • •Revenue model still undefined, enterprise server features not yet available
Category
Design
Target Audience

Civil engineers, surveyors, BIM professionals

Similar To

Autodesk Civil 3D · Bentley OpenRoads · QGIS

Post Description

Stonn is a 3D viewer that allows you to load LandXML, IFC, GeoJSON and TopoJSON files in the same workspace and see a full project in one place.

* What does this fix? - Instead of having to move around between teams with single copies of your Civil3D, Reviit, Rhino, etc. files, you can load everything here to view for example: terrain displacement or maybe a building construction in time (it's in the feature list!) and pack everything in a .sff federated file that contains everything and you can share between teams without hassle. This streamlines a lot the work between teams.

It's also optimized for loading massive files, we tested it with gibibyte sized LandXMLs (around 12m triangles) while still being responsive (~20-30 fps) on iGPU.

We're still planning the revenue model (the CLI tool and viewer will probably remain free), so for now, enjoy it for free!

Oh! Any comments appreciated, I've been blindsided into this BIM/terrain/3D domain so I'm bound to make a lot of mistakes and learn a lot!

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