OpenLayers.Layer.XYZ

The XYZ class is designed to make it easier for people who have tiles arranged by a standard XYZ grid.

Inherits from

OpenLayers.Layer.Grid

Summary

OpenLayers.Layer.XYZ	The XYZ class is designed to make it easier for people who have tiles arranged by a standard XYZ grid.
Properties
isBaseLayer	Default is true, as this is designed to be a base tile source.
sphericalMecator	Whether the tile extents should be set to the defaults for spherical mercator.
zoomOffset	{Number} If your cache has more zoom levels than you want to provide access to with this layer, supply a zoomOffset.
serverResolutions	{Array} A list of all resolutions available on the server.
Constructor
OpenLayers.Layer.XYZ
Functions
clone	Create a clone of this layer
getURL
getXYZ	Calculates x, y and z for the given bounds.
setMap	When the layer is added to a map, then we can fetch our origin (if we don’t have one.)
OpenLayers.Layer.OSM	A class to access OpenStreetMap tiles.

Properties

isBaseLayer

Default is true, as this is designed to be a base tile source.

sphericalMecator

Whether the tile extents should be set to the defaults for spherical mercator. Useful for things like OpenStreetMap. Default is false, except for the OSM subclass.

zoomOffset

{Number} If your cache has more zoom levels than you want to provide access to with this layer, supply a zoomOffset. This zoom offset is added to the current map zoom level to determine the level for a requested tile. For example, if you supply a zoomOffset of 3, when the map is at the zoom 0, tiles will be requested from level 3 of your cache. Default is 0 (assumes cache level and map zoom are equivalent). Using zoomOffset is an alternative to setting serverResolutions if you only want to expose a subset of the server resolutions.

serverResolutions

{Array} A list of all resolutions available on the server. Only set this property if the map resolutions differs from the server.

Constructor

OpenLayers.Layer.XYZ

Parameters

name	{String}
url	{String}
options	{Object} Hashtable of extra options to tag onto the layer

Functions

clone

clone: function ( obj )

Create a clone of this layer

Parameters

obj	{Object} Is this ever used?

Returns

{OpenLayers.Layer.XYZ} An exact clone of this OpenLayers.Layer.XYZ

getURL

getURL: function ( bounds )

Parameters

bounds

{OpenLayers.Bounds}

Returns

{String} A string with the layer’s url and parameters and also the passed-in bounds and appropriate tile size specified as parameters

getXYZ

getXYZ: function( bounds )

Calculates x, y and z for the given bounds.

Parameters

bounds

{OpenLayers.Bounds}

Returns

{Object}

an object with x, y and z properties.

setMap

setMap: function( map )

When the layer is added to a map, then we can fetch our origin (if we don’t have one.)

Parameters

map	{OpenLayers.Map}

OpenLayers.Layer.OSM

A class to access OpenStreetMap tiles. By default, uses the OpenStreetMap hosted tile.openstreetmap.org ‘Mapnik’ tileset. If you wish to use tiles@home / osmarender layer instead, you can pass a layer like:

new OpenLayers.Layer.OSM("t@h",
  "http://tah.openstreetmap.org/Tiles/tile/${z}/${x}/${y}.png");

This layer defaults to Spherical Mercator.

Inherits from