Leaflet

Leaflet is a lightweight JavaScript library for map display and interaction by CloudMade. It will form the core of CloudMade's next generation JavaScript API.

It is built from the ground up to work well on both desktop and mobile web browsers, utilizing cutting-edge technologies included in HTML5. It's main priorities are usability, performance, A-grade browser support (up to IE6), flexibility and easy to use API. The OOP-based code of the library is designed to be modular, extensible and very easy to understand and modify.

Contributing to Leaflet

We really look forward to any help with the development! But first, in order to contribute to Leaflet, you will need to sign a non-exclusive copyright assignment agreement online. We're forced to ask this to ensure that CloudMade can redistribute the library with your contributions in it. Please contact leaflet@cloudmade.com about this. After signing the agreement, we'll be happy to accept your contributions!

What's left to do for initial version

Interaction:

• mouse wheel zoom
• shift-drag zoom
• double tap on iOS

Overlays:

• markers
• info window
• vectors (polyline, polygon)
• vector editing
• image overlays

Overlay formats:

• KML
• GeoRSS
• GeoJSON

Controls:

• control infrastructure (smart positioning)
• copyright control
• basic zoom control
• zoom slider

Core:

• CSS transitions with timer-based fallback

Visual appearance:

• panning animation
• zooming animation
• show scaled background until tiles are loaded
• tiles fade-in animation?
• spiral tile loading

Misc:

• map mouseover/mouseout/mousemove events

Browser issues:

• alpha-transparent tiles on IE