Draw fields once, then split them into management zones, cut margin strips along the edge and merge fields when the crop plan changes.
vectorstream is a web map geometry editor in which neighbouring polygons share their borders. In agriculture it is used to maintain field boundaries, management zones and margin strips: moving the line between two zones changes both of them, and a strip cut off the outer edge of a field leaves the rest of the field intact. Fields import and export as GeoJSON, so the editor fits next to farm management and agronomy software.
Use cases
Field outlines change slowly, but they do change: a hedge is removed, two fields are farmed as one, a corner is sold. Each of these changes touches the neighbouring field as well.
Zones divide a field by soil, drainage or past performance. They cover the field exactly, so a zone boundary is one line between two zones, not two lines that almost agree.
Field margins, buffer strips along watercourses and headlands run along the field edge. Cutting a strip off the outer edge takes it out of the cropped area, and the field keeps its shared borders with the fields beside it.
Why topology
Zones drawn as separate shapes never quite meet, and every mismatch is a strip that belongs to no zone. Stored as one shared edge, a zone boundary keeps the zones flush with each other and with the field.
Fields are edited every season. Exact undo and documents saved automatically in the browser let an agronomist try a new zoning and go back if it does not work out.
Field data moves between farm management and agronomy tools as files. GeoJSON import with a geometry check and GeoJSON export make vectorstream one editing step in that chain.
How it works
Load fields as GeoJSON. Problems in the file are reported before anyone edits.
Split each field into management zones along straight lines between its corners.
Cut buffer strips or headlands off the field edge wherever they are needed.
Export fields and zones as GeoJSON for planning, records or field maps.
FAQ
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