Schemify logo

Schemify

An Open Source Schematization Tool by Geominds

Data

Click to upload or drag a .geojson / .json file here
Or paste GeoJSON text
Or fetch a real metro network by city
Data via the Organic Maps Subway Validator (OpenStreetMap). Cross-origin fetches aren't guaranteed to work from every browser/network — if the direct fetch fails, use the fallback options.
Or paste a direct GeoJSON URL:

Shape

Higher = fewer points, blockier shapes.
Higher = straighter, more rigid layout; lower stays closer to the real shape.
Higher = fewer tiny, cluttered segments.
Merges nearby points from different routes/lines that don't share exact coordinates, and snaps standalone stations onto a nearby line instead of leaving them floating disconnected beside it — useful when routes/stops were digitized separately. Leave at 0% for already-clean data (like the built-in city feeds); higher values can wrongly merge two genuinely distinct nearby stations.
When two or more routes run the same stretch, draw them as offset parallel lines instead of one overlapping line. Spacing is based on each route's stroke width, so thicker lines get more room.

How this works / why octilinear?

Real geography is messy — wiggly roads, uneven spacing. A schematic map (think subway maps) simplifies geometry, straightens lines, and snaps angles to a small set of directions (usually 45° or 90°) so the result reads cleanly at a glance, at the cost of true geographic accuracy.

This tool: simplifies each line/polygon (Douglas–Peucker), builds a graph of shared points, then iteratively nudges nodes so edges align to the snapped angles while keeping relative topology. At junctions with 3+ connections a perfect fit isn't always possible — this is a fast heuristic, not a full constraint solver, so busy junctions may land a few degrees off-grid.

Open Style & layers (left rail icon, opens on the right) to recolor, re-weight, and relabel each layer — or a single segment — once you're happy with the shape. Use the floating Pan / Select / Text tools on the schematic panel to switch between panning the map, selecting a layer or segment, and editing a label's text style.
💡 Left rail: Data / Shape / Style & layers / Help — Style & layers opens on the right. On the schematic panel, use the floating +/− zoom and the Pan / Select / Text tools — Select to click a line, station, or a stretch between two points; Text to click a label and edit its text style. Toggle 🔗 Sync zoom to move both panels together.
Original (projected & simplified)
Upload a GeoJSON file to begin
Schematic output — no data loaded
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Background
Style preset
Label style
Applies to every layer that hasn't been switched to a custom label style below (each layer's Label group has a "Custom style for this layer" toggle to opt out).
Layers
Click a layer here, or use the Select tool on the map, to select and style it. Select a single stretch between two points to style just that segment. Use the Text tool to click a label directly.
No data loaded yet.

About Schemify

Schemify turns real-world GeoJSON — transit lines, roads, boundaries — into clean, schematic maps in your browser: no server, no install, no build step.

Built by Ark Arjun for Geominds, released as open source under the MIT license. The Schemify logo is also designed by Ark Arjun.

City network samples are fetched from the Organic Maps Subway Validator, built on OpenStreetMap data.

Label fonts: Sans-serif, Serif, Script, and Display are Manjari, Rachana, Chilanka, and Keraleeyam respectively, by Swathanthra Malayalam Computing (SMC); Monospace is JetBrains Mono by JetBrains. All are released under the SIL Open Font License.

Source code on GitHub — issues and pull requests welcome.

Style file format

Import/export uses a plain JSON file with the canvas background color, layer draw order, and each layer's style — colors, widths, dash pattern, node/label settings (including the new text style options), and any per-segment overrides. Layers are matched by name, so a style file exported from one dataset can be reused on another with matching layer names.

Report a bug

This opens a prefilled issue on github.com/arkarjun/Schemify — you'll need a GitHub account to submit it. Basic diagnostics (browser, layer count, angle-snap mode) are added automatically; your map data is never sent.