OpenLayers. Layer.WMS

Instances of OpenLayers.Layer.WMS are used to display data from OGC Web Mapping Services. Create a new WMS layer with the OpenLayers.Layer.WMS constructor.

Inherits from

OpenLayers.Layer.Grid

Summary

OpenLayers. Layer.WMS	Instances of OpenLayers.Layer.WMS are used to display data from OGC Web Mapping Services.
Constants
DEFAULT_PARAMS	{Object} Hashtable of default parameter key/value pairs
Properties
isBaseLayer	{Boolean} Default is true for WMS layer
encodeBBOX	{Boolean} Should the BBOX commas be encoded?
noMagic	{Boolean} If true, the image format will not be automagicaly switched from image/jpeg to image/png or image/gif when using TRANSPARENT=TRUE.
Constructor
OpenLayers. Layer.WMS	Create a new WMS layer object
Functions
mergeNewParams	Catch changeParams and uppercase the new params to be merged in before calling changeParams on the super class.
getFullRequestString	Combine the layer’s url with its params and these newParams.

Constants

DEFAULT_PARAMS

{Object} Hashtable of default parameter key/value pairs

Properties

isBaseLayer

{Boolean} Default is true for WMS layer

encodeBBOX

{Boolean} Should the BBOX commas be encoded? The WMS spec says ‘no’, but some services want it that way. Default false.

noMagic

{Boolean} If true, the image format will not be automagicaly switched from image/jpeg to image/png or image/gif when using TRANSPARENT=TRUE. Also isBaseLayer will not changed by the constructor. Default false.

Constructor

OpenLayers. Layer.WMS

Create a new WMS layer object

Example

var wms = new OpenLayers.Layer.WMS("NASA Global Mosaic",
                                   "http://wms.jpl.nasa.gov/wms.cgi",
                                   {layers: "modis,global_mosaic"});

Parameters

name	{String} A name for the layer
url	{String} Base url for the WMS (e.g. http://wms.jpl.nasa.gov/wms.cgi)
params	{Object} An object with key/value pairs representing the GetMap query string parameters and parameter values.
options	{Ojbect} Hashtable of extra options to tag onto the layer

Functions

mergeNewParams

mergeNewParams:function( newParams )

Catch changeParams and uppercase the new params to be merged in before calling changeParams on the super class.

Once params have been changed, the tiles will be reloaded with the new parameters.

Parameters

newParams

{Object} Hashtable of new params to use

getFullRequestString

getFullRequestString:function( newParams,
altUrl )

Combine the layer’s url with its params and these newParams.

Add the SRS parameter from projection -- this is probably more eloquently done via a setProjection() method, but this works for now and always.

Parameters

newParams	{Object}
altUrl	{String} Use this as the url instead of the layer’s url

Returns

{String}