Pin map maker

How to use it

1. Search for a place and add it, or press Click the map and click where the pin goes.
2. Select a pin in the list to change its label or colour, or remove it. Drag pins on the map to move them.
3. Set the map style at the top of the map and zoom to frame the map.
4. Press PNG for the picture, or GeoJSON, KML or CSV for the data. The link keeps the pins.

5 practical uses

1. Map the stops of a trip, a pub crawl or a running route.
2. Mark shops, offices or sites for a flyer or a slide.
3. Make a map of your customers or your club's members.
4. Plan a wedding, a festival or a race with the venues pinned.
5. Share a map of places with a link that keeps the pins.

The maths behind it

Pins are stored as latitude and longitude to five decimals, about one metre, and drawn by the map engine, which projects each to Web Mercator: x = λ, y = ln(tan(π/4 + φ/2)), scaled to the zoom. The image is the map's own rendered canvas, so it matches the screen pixel for pixel.

Notes

Pins live in the link (up to about fifty), so a bookmark or a shared link brings the same map back. The image is the map as shown, at the screen's resolution, with the OpenStreetMap credit that the data licence asks for. Paste a CSV with name, lat, lng columns to add many pins at once; the CSV map plotter handles larger tables.