Give analysts and agents a map where plots can be outlined, combined into sites and divided into lots, with building footprints that come out square.
vectorstream is an embeddable geometry editor for web maps, built on a topology model in which neighbouring shapes share their borders. Real estate and PropTech products use it to let users outline plots, assemble development sites from adjoining lots, divide a site into lots and sketch building footprints. Results are exported as GeoJSON for valuation, listing or portfolio systems.
Use cases
Developers look at which adjoining plots could form one site. Merging the plots on the map shows the assembled site, and undo takes the assembly apart again exactly as it was.
A site is divided into lots for a scheme or for sale. Lots share their side boundaries, so moving one dividing line resizes both lots next to it.
Footprints drawn by hand rarely come out square. The straightening tool evens out near-right angles and shows live numbers, so a sketch becomes a clean outline for a massing study.
Why topology
Plot boundaries are shared by definition. Storing each shared line once keeps assembled sites and subdivided lots free of the slivers that would distort a site plan.
PropTech teams choose map libraries for rendering, cost or licensing reasons. vectorstream runs the same editing core on Leaflet, OpenLayers and MapLibre GL, so a switch does not mean rebuilding the editor.
Every plot, lot and footprint exports as GeoJSON, a format that any backend can store and that GIS tools read directly.
How it works
Your app loads the relevant plots from its own data as GeoJSON.
The user merges plots into a site or splits a site into lots.
Footprints are drawn, snapped to existing corners and straightened.
The result is exported as GeoJSON and stored with the deal, the listing or the project.
FAQ
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