Draw it, snap it, edit it
Build a network on the map or fix one you inherited. Elements are real layers you can style, select and edit — not a black-box drawing surface.
Made with love, for analytical minds
Your pocket GIS.
A real GIS in a browser tab, specialised for hydraulic modelling. Nothing to install. Your data stays with your model — period.
Free to start. Upgrade only when you outgrow the limits.
The solvers you already trust
Industry-standard engines, compiled to WebAssembly and running on your own machine — not reimplementations. Hydraulic and hydrologic modelling comes first; more domains follow.
- EPANET Water distribution networks Available
- SWMM Stormwater & wastewater Available
- TUFLOW 2D flood modelling Coming
- HEC-RAS River hydraulics Coming
- HEC-HMS Catchment hydrology Coming
Want a different engine, or a vote on the order? Say so on the forum.
One workbench, end to end
Most modelling tooling makes you move between a GIS, a modelling package and a spreadsheet. This does the whole loop in one place.
SQL over your whole model
Every network, layer and result set is queryable with DuckDB. Join model attributes against imported GIS data and simulation output in one statement.
Bring your existing data
Import shapefiles, GeoPackage, GeoJSON and cloud-optimised GeoTIFF. Style it, snap to it, and build a model on top of it.
Notebooks, in the same tab
A real Python kernel next to the map. Reach into the model, run your own analysis, and write results straight back as a layer.
Repeatable, not re-clicked
Wire imports, queries, runs and exports into a workflow you can re-run when the input data changes.
Compare, then decide
Branch a network, change what you need, and run scenarios side by side without duplicating the whole model.
Your data stays on your machine
This is not a thin client for someone else's server. The solvers, the database and the Python runtime all execute in your browser, and your models are stored locally on your own disk. There is no upload step, because there is nowhere to upload to.
That matters when the network you are modelling is critical infrastructure and the answer to “where does this data go?” has to be “nowhere”.
Open a model in the next minute
No sign-up, no trial timer. Load one of the sample networks and run it.