Post-fire recovery
Mount Sentinel-2 composites before and after the burn. Draw sectors, annotate regrowth density, run vegetation-index queries and export a PDF report the agency can read.
Public beta — soon
The map is the meeting.
Driades is a collaborative geospatial canvas that runs entirely in your browser. Drop cloud-native data, draw with your team in real time, scrub through years of satellite imagery — all on the same map, with zero installs and zero servers to manage.
Open source and self-hostable from day one. Built for the h4ck1ng.science forest-monitoring workshop.
01 — Presence
Everyone on the same map
No invites, no accounts, no friction. A Driades room is just a URL. Send it to anyone — they open it and they're geo-anchored on the same map, zoom level and coordinates as the rest of the team.
You can literally point at something. Cursors carry names. Click an avatar and your camera glides along with theirs until you take the wheel back.
02 — Data
Drop it and it's on the map
Drag PMTiles, Cloud-Optimized GeoTIFF, GeoParquet, GeoJSON or Zarr datacubes straight from your desktop. Or paste a URL to an S3 bucket — Driades reads data in place over HTTP range requests, so a gigabyte layer is on the map in seconds without touching a server.
Layers behave like Photoshop: reorder freely, tweak opacity per layer, lock the ones you're done with. URL layers are shared with the room automatically — everyone sees what you see the moment it loads.
03 — Clipping
Draw an area. Drop data onto it.
Draw a boundary and anything you drop is clipped to that exact shape. Vectors filter to the polygon instantaneously. Rasters are genuinely masked — every tile composited in pixel space so the edges outside really do go transparent.
Tweak a vertex and every layer bound to that area re-clips, live, on every collaborator's screen. The boundary stays editable forever.
04 — Annotation
Measure it, name it, discuss it
Click any shape for its geodesic area, perimeter and length — the numbers everyone in the room sees update the instant you draw. Name an area "Sector B" and it travels with the document.
Drop sticky notes pinned to exact coordinates. Two people can type in the same note at once. Every action lives in a shared, filterable history you can rewind with Ctrl+Z — or scrub back years and see what was said then.
05 — Time
Scrub the whole room backwards
Time is treated like any other dimension. One shared timeline everyone in the room moves together — drag the slider and observations carrying dates appear and disappear, drawings from that year vanish, notes reappear.
Stack satellite imagery by year and press play: a flipbook, a cross-fade blend, or a true per-pixel mean — all in sync for every collaborator watching.
06 — Analysis
Query it without leaving the map
DuckDB-WASM executes spatial SQL directly in your browser — query any loaded layer, filter by geometry or attribute, and mount the results straight back as a new coloured layer on the canvas. No server roundtrip.
For heavier work, pipe a drawn area into your own API or a hosted Gradio app. Inputs arrive prefilled, results land as layers, the full job history is shared with everyone in the room.
07 — Dryads
Humans aren't the only collaborators
Scripts and AI agents join a room as full peers — we call them dryads, and each one moves a visible 🧚 cursor across the map. A Python client and an MCP server give them the same powers you have: draw, annotate, mount layers, set the time, fly the camera.
Everything a dryad does is recorded in the same document — you don't read a log, you watch it work, live, alongside your human team.