A zoning map maker that doesn’t need a GIS license

Import any source

Zipped shapefile, GeoJSON, KML, or a CSV of parcel centroids. Coordinate systems are auto-detected and reprojected to WGS84 using proj4 when a .prj file is present. The ingestion runs in a web worker so the UI stays responsive even on a county-wide parcel layer. We validate longitude and latitude ranges before render and surface clear warnings when a file appears to use a projected CRS without a .prj — the most common cause of "my zones moved to the ocean" bugs in other tools.

Drawing & editing without learning a CAD UI

Polygon, rectangle, and freehand tools with snapping. Edit vertices, split, and merge with right-click. Undo/redo always available. Snap-to-vertex and snap-to-edge are toggleable so you can match a neighbor parcel exactly or freehand a conceptual boundary. Area and perimeter update live in metric and imperial units, and every shape can carry arbitrary attributes (zone code, jurisdiction, adopted date, ordinance reference) that flow through to export.

Style by zone code

Auto-color by zoning category, override per district, set fill opacity, and add labels. Style is preserved in shareable URLs so anyone who opens your link sees the exact map you styled. The default categorical palette is colorblind-safe, and you can override on a per-district basis for high-contrast presentation views.

Publishing zoning maps for public consumption

Every saved zoning map gets a public, no-login URL. Cities embed these on their planning department site or link them from public-notice PDFs. Visitors can pan, zoom, click a parcel to see its zone code, and (if you enable it) toggle layers on and off. This replaces a lot of the static PDF maps that municipalities still rely on, and it solves the "the PDF is six months out of date" problem because your live edits propagate immediately.

Real estate investor and developer use cases

Beyond municipal use, investors and developers build their own private zoning maps to track entitlement opportunities: parcels currently zoned single-family that are inside an upzoning study area, lots with conditional use permits pending, or properties where a recent variance creates upside. The drawing tools let you sketch a hypothetical lot consolidation and immediately see the combined area, which is often the first sanity check before a feasibility study.

Comparing existing and proposed zoning

Load the current zoning layer, sketch a proposed overlay, then open the side-by-side comparison to communicate the change. Both sides stay synchronized in pan and zoom. Export the split view as PNG for a council packet, or as two separate GeoJSON files for the official record.

Frequently asked questions