Mark work zones, closures and inspection sections before crews go out. Adjacent zones share their borders, and every plan exports as GeoJSON.
vectorstream is a geometry editor that runs inside web maps built on Leaflet, OpenLayers or MapLibre GL. Infrastructure teams use it to plan the areas that field work depends on: construction phases, lane closures, inspection sections and site layouts. Adjacent areas share one border, edits can be undone exactly, and the result is exported as GeoJSON for scheduling or permit systems.
Use cases
A site is divided into phases, laydown areas and access routes. The areas touch, and when phase two grows, phase three has to shrink by exactly the same line.
Lane closures and diversions are drawn on a map for approval. They change whenever the programme changes, so they need quick edits and a dependable way back to the agreed version.
Bridges, embankments and long corridors are inspected in sections. Splitting a corridor into sections that meet end to end makes it plain which team covers which stretch.
Why topology
When two work zones are drawn separately, the strip between them belongs to nobody or to both. With one shared border, the handover line between two crews or two contractors is a single line.
Infrastructure tools are often built by different teams on different map libraries. One editing core behind Leaflet, OpenLayers and MapLibre GL means the same tools and the same behaviour in each of them.
Programmes change from one day to the next. Exact undo lets a planner try a revised closure and return to the agreed layout without redrawing it.
How it works
Import the corridor, the site boundary or existing zones as GeoJSON.
Draw phases, closures and sections. Snap to existing corners, and moved areas dock flush against their neighbours.
Split, merge or retrace zones. Undo brings back the previous layout exactly.
Export the zones as GeoJSON for the permit, scheduling or briefing system.
FAQ
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