Leaflet

A Modern, Lightweight Open-Source JavaScript Library for Interactive Maps by CloudMade

Map

Map methods

UI layers

Marker
Popup

Raster layers

Vector layers

Path
Polyline
Polygon
Circle

Basic types

Interfaces

Utility

DOM utility

Mixins

Mixin.Events

L.Map

The central class of the API — it is used to create a map on a page and manipulate it.

Usage example

// initialize the map on the "map" div with a given center and zoom 
var map = new L.Map('map', {
	center: new L.LatLng(51.505, -0.09), 
	zoom: 13
});

// create a CloudMade tile layer
var cloudmadeUrl = 'http://{s}.tile.cloudmade.com/YOUR-API-KEY/997/256/{z}/{x}/{y}.png',
	cloudmade = new L.TileLayer(cloudmadeUrl, {maxZoom: 18});

// add the CloudMade layer to the map
map.addLayer(cloudmade);

Constructor

Constructor	Description
`L.Map( <HTMLElement\|String> id, <Map options> options? )`	Instantiates a map object given a div element (or its id) and optionally an object literal with map options described below.

Options

Option	Type	Default value	Description
`center`	`LatLng`	`null`	Initial geographical center of the map.
`zoom`	`Number`	`null`	Initial map zoom.
`layers`	`ILayer[]`	`[]`	Layers that will be added to the map initially.
`dragging`	`Boolean`	`true`	Whether the map be draggable with mouse/touch or not.
`touchZoom`	`Boolean`	`true`	Whether the map can be zoomed by touch-dragging with two fingers.
`scrollWheelZoom`	`Boolean`	`true`	Whether the map can be zoomed by using the mouse wheel.
`doubleClickZoom`	`Boolean`	`true`	Whether the map can be zoomed in by double clicking on it.
`trackResize`	`Boolean`	`true`	Whether the map automatically handles browser window resize to update itself.

Methods that modify map state

Method	Returns	Description
`setView( <LatLng> center, <Number> zoom, <Boolean> forceReset? )`	`this`	Sets the view of the map (geographical center and zoom). If `forceReset` is set to `true`, the map is reloaded even if it's eligible for pan animation (`false` by default).
`setZoom( <Number> zoom )`	`this`	Sets the zoom of the map.
`zoomIn()`	`this`	Increases the zoom of the map by 1.
`zoomOut()`	`this`	Decreases the zoom of the map by 1.
`fitBounds( <LatLngBounds> bounds )`	`this`	Sets a map view that contains the given geographical bounds with the maximum zoom level possible.
`panTo( <LatLng> latlng )`	`this`	Pans the map to a given center. Makes an animated pan if new center is not more than one screen away from the current one.
`panBy( <Point> point )`	`this`	Pans the map by a given number of pixels (animated).
`addLayer( <ILayer> layer )`	`this`	Adds a given layer to the map.
`removeLayer( <ILayer> layer )`	`this`	Removes the given layer from the map.
`invalidateSize()`	`this`	Checks if the map container size changed and updates the map if so — call it after you've changed the map size dynamically.

Methods that get map state

Method	Returns	Description
`getCenter()`	`LatLng`	Returns the geographical center of the map view.
`getZoom()`	`Number`	Returns the current zoom of the map view.
`getMinZoom()`	`Number`	Returns the minimum zoom level of the map.
`getMaxZoom()`	`Number`	Returns the maximum zoom level of the map.
`getBoundsZoom( <LatLngBounds> bounds )`	`Number`	Returns the maximum zoom level on which the given bounds fit to the map view in its entirety.
`getSize()`	`Point`	Returns the current size of the map container.
`getPixelBounds()`	`Bounds`	Returns the bounds of the current map view in projected pixel coordinates (sometimes useful in layer and overlay implementations).
`getPixelOrigin()`	`Point`	Returns the projected pixel coordinates of the top left point of the map layer (useful in custom layer and overlay implementations).
`getPanes()`	`Panes`	Returns an object for accessing different panes of the map (tile pane, marker pane, etc.).

Conversion methods

Method	Returns	Description
`latLngToLayerPoint( <LatLng> latlng )`	`Point`	Returns the map layer point that corresponds to the given geographical coordinates (useful for placing overlays on the map).
`layerPointToLatLng( <Point> point )`	`LatLng`	Returns the geographical coordinates of a given map layer point.
`mouseEventToContainerPoint( <MouseEvent> event )`	`Point`	Returns the pixel coordinates of a mouse click (relative to the top left corner of the map) given its event object.
`mouseEventToLayerPoint( <MouseEvent> event )`	`Point`	Returns the pixel coordinates of a mouse click relative to the map layer given its event object.
`mouseEventToLatLng( <MouseEvent> event )`	`LatLng`	Returns the geographical coordinates of the point the mouse clicked on given the click's event object.
`containerPointToLayerPoint( <Point> point )`	`Point`	Converts the point relative to the map container to a point relative to the map layer.
`layerPointToContainerPoint( <Point> point )`	`Point`	Converts the point relative to the map layer to a point relative to the map container.
`project( <LatLng> latlng, <Number> zoom? )`	`Point`	Projects the given geographical coordinates to pixel coordinates for the given zoom level (current zoom level by default).
`unproject( <Point> point, <Number> zoom? )`	`LatLng`	Projects the given pixel coordinates to geographical coordinates for the given zoom level (current zoom level by default).

L.Path

An abstract class that contains options and constants shared between vector overlays (Polygon, Polyline, Circle). Do not use it directly.

Options

Option	Type	Default value	Description
`stroke`	`Boolean`	`true`	Whether to draw stroke along the path. Set it to `false` to disable borders on polygons or circles.
`color`	`String`	`'#03f'`	Stroke color.
`weight`	`Number`	`5`	Stroke width in pixels.
`opacity`	`Number`	`0.5`	Stroke opacity.
`fill`	`Boolean`	depends	Whether to fill the path with color. Set it to `false` to disable filling on polygons or circles.
`fillColor`	`String`	same as color	Fill color.
`fillOpacity`	`Number`	0.2	Fill opacity.

Constants

Constant	Type	Value	Description
`L.Path.SVG`	`Boolean`	depends	True if SVG is used for vector rendering (true for most modern browsers).
`L.Path.VML`	`Boolean`	depends	True if VML is used for vector rendering (IE 6-8).
`L.Path.CLIP_PADDING`	`Number`	0.5 for SVG 0.02 for VML	How much to extend the clip area around the map view (relative to its size, e.g. 0.5 is half the screen in each direction). Smaller values mean that you will see clipped ends of paths while you're dragging the map, and bigger values decrease drawing performance.

Polyline

A class for drawing polyline overlays on a map. Extends Path. Use Map#addLayer to add it to the map.

Usage example

// create a red polyline from an arrays of LatLng points
var polyline = new L.Polyline(latlngs, {color: 'red'});

// zoom the map to the polyline
map.fitBounds(new L.LatLngBounds(latlngs));

// add the polyline to the map
map.addLayer(polyline);

Constructor

Constructor	Description
`L.Polyline( <LatLng[]> latlngs, <Polyline options> options? )`	Instantiates a polyline object given an array of geographical points and optionally an options object.

Options

You can use Path options and additionally the following options:

Option	Type	Default value	Description
`smoothFactor`	`Number`	`1.0`	How much to simplify the polyline on each zoom level. More means better performance and smoother look, and less means more accurate representation.
`noClip`	`Boolean`	`false`	Disabled polyline clipping.

Polygon

A class for drawing polygon overlays on a map. Extends Polyline. Use Map#addLayer to add it to the map.

Constructor

Constructor	Description
`L.Polygon( <LatLng[]> latlngs, <Polyline options> options? )`	Instantiates a polygon object given an array of geographical points and optionally an options object (the same as for Polyline).

Circle

A class for drawing circle overlays on a map. Extends Path. Use Map#addLayer to add it to the map.

Constructor

Constructor	Description
`L.Circle( <LatLng> latlng, <Number> radius, <Path options> options? )`	Instantiates a polygon object given an geographical point, a radius in pixels and optionally an options object.

L.Point

Represents a point with x and y coordinates in pixels.

Constructor

Constructor	Description
`L.Point( <Number> x, <Number> y )`	Creates a Point object with the given x and y coordinates.

Properties

Property	Type	Description
`x`	`Number`	The x coordinate.
`y`	`Number`	The y coordinate.

Methods

Method	Returns	Description
`add( <Point> otherPoint )`	`Point`	Returns the result of addition of the current and the given points.
`subtract( <Point> otherPoint )`	`Point`	Returns the result of subtraction of the given point from the current.
`multiplyBy( <Number> number )`	`Point`	Returns the result of multiplication of the current point by the given number.
`divideBy( <Number> number )`	`Point`	Returns the result of division of the current point by the given number.
`distanceTo( <Point> otherPoint )`	`Number`	Returns the distance between the current and the given points.
`clone()`	`Point`	Returns a copy of the current point.
`round()`	`Point`	Returns a copy of the current point with rounded coordinates.
`toString()`	`String`	Returns a string representation of the point for debugging purposes.

L.LatLng

Represents a geographical point with a certain latitude and longitude.

Constructor

Constructor	Description
`L.LatLng( <Number> latitude, <Number> longitude, <Boolean> noWrap? )`	Creates a LatLng object with the given latitude and longitude. Wraps longitude to lie between -180 and 180 and clamps longitude between -90 and 90 by default — you can disable this with the noWrap argument.

Properties

Property	Type	Description
`lat`	`Number`	Latitude in degrees.
`lng`	`Number`	Longitude in degrees.

Methods

Method	Returns	Description
`equals( <LatLng> otherLatlng )`	`Boolean`	Returns true if the given LatLng point is at the same position (within a small margin of error).
`toString()`	`String`	Returns a string representation of the point (for debugging purposes).

Constants

Constant	Type	Value	Description
`DEG_TO_RAD`	`Number`	`Math.PI / 180`	A multiplier for converting degrees into radians.
`RAD_TO_DEG`	`Number`	`180 / Math.PI`	A multiplier for converting radians into degrees.
`MAX_MARGIN`	`Number`	`1.0E-9`	Max margin of error for the equality check.

Leaflet

A Modern, Lightweight Open-Source JavaScript Library for Interactive Maps by CloudMade

Contents

Map

Map methods

UI layers

Raster layers

Vector layers

Basic types

Interfaces

Utility

DOM utility

Mixins

L.Map

Usage example

Constructor

Options

Methods that modify map state

Methods that get map state

Conversion methods

L.Path

Options

Constants

Polyline

Usage example

Constructor

Options

Polygon

Constructor

Circle

Constructor

L.Point

Constructor

Properties

Methods

L.LatLng

Constructor

Properties

Methods

Constants