Class: TileImage

ol/source/TileImage~TileImage 


import TileImage from 'ol/source/TileImage';

Base class for sources providing images divided into a tile grid.

new TileImage(options)

source/TileImage.js, line 69
Name Type Description
options

Image tile options.

Name Type Description
attributions module:ol/source/Source~AttributionLike

Attributions.
attributionsCollapsible boolean (defaults to true)

Attributions are collapsible.
cacheSize number

Initial tile cache size. Will auto-grow to hold at least the number of tiles in the viewport.
crossOrigin null | string

The crossOrigin attribute for loaded images. Note that you must provide a crossOrigin value if you want to access pixel data with the Canvas renderer. See https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image for more detail.
imageSmoothing boolean (defaults to true)

Enable image smoothing.
opaque boolean (defaults to false)

Whether the layer is opaque.
projection module:ol/proj~ProjectionLike

Projection. Default is the view projection.
reprojectionErrorThreshold number (defaults to 0.5)

Maximum allowed reprojection error (in pixels). Higher values can increase reprojection performance, but decrease precision.
state module:ol/source/State

Source state.
tileClass Class.<module:ol/ImageTile~ImageTile>

Class used to instantiate image tiles. Default is module:ol/ImageTile~ImageTile.
tileGrid module:ol/tilegrid/TileGrid~TileGrid

Tile grid.
tileLoadFunction module:ol/Tile~LoadFunction

Optional function to load a tile given a URL. The default is

function(imageTile, src) {
  imageTile.getImage().src = src;
};
tilePixelRatio number (defaults to 1)

The pixel ratio used by the tile service. For example, if the tile service advertizes 256px by 256px tiles but actually sends 512px by 512px images (for retina/hidpi devices) then tilePixelRatio should be set to 2.
tileUrlFunction module:ol/Tile~UrlFunction

Optional function to get tile URL given a tile coordinate and the projection.
url string

URL template. Must include {x}, {y} or {-y}, and {z} placeholders. A {?-?} template pattern, for example subdomain{a-f}.domain.com, may be used instead of defining each one separately in the urls option.
urls Array.<string>

An array of URL templates.
wrapX boolean

Whether to wrap the world horizontally. The default, is to request out-of-bounds tiles from the server. When set to false, only one world will be rendered. When set to true, tiles will be requested for one world only, but they will be wrapped horizontally to render multiple worlds.
transition number

Duration of the opacity transition for rendering. To disable the opacity transition, pass transition: 0.
key string

Optional tile key for proper cache fetching
zDirection number (defaults to 0)

Indicate which resolution should be used by a renderer if the view resolution does not match any resolution of the tile source. If 0, the nearest resolution will be used. If 1, the nearest lower resolution will be used. If -1, the nearest higher resolution will be used.
Fires:

Subclasses

Extends

Methods

changed() inherited

Observable.js, line 34

Increases the revision counter and dispatches a 'change' event.

clear() inherited

source/Tile.js, line 312

Remove all cached tiles from the source. The next render cycle will fetch new tiles.

dispatchEvent(event){boolean|undefined} inherited

events/Target.js, line 85

Dispatches an event and calls all listeners listening for events of this type. The event parameter can either be a string or an Object with a type property.

Name Type Description
event module:ol/events/Event~BaseEvent | string

Event object.
Returns:
false if anyone called preventDefault on the event object or if any of the listeners returned false.

get(key){*} inherited

Object.js, line 113

Gets a value.

Name Type Description
key string

Key name.
Returns:
Value.

getKeys(){Array.<string>} inherited

Object.js, line 126

Get a list of object property names.

Returns:
List of property names.

getProjection(){module:ol/proj/Projection~Projection} inherited

source/Source.js, line 115

Get the projection of the source.

Returns:
Projection.

getProperties(){Object.<string, *>} inherited

Object.js, line 135

Get an object of all property names and values.

Returns:
Object.

getRevision(){number} inherited

Observable.js, line 45

Get the version number for this object. Each time the object is modified, its version number will be incremented.

Returns:
Revision.

getState(){module:ol/source/State} inherited

source/Source.js, line 132

Get the state of the source, see module:ol/source/State~State for possible states.

Returns:
State.

getTileGrid(){module:ol/tilegrid/TileGrid~TileGrid} inherited

source/Tile.js, line 232

Return the tile grid of the tile source.

Returns:
Tile grid.

getTileLoadFunction(){module:ol/Tile~LoadFunction} inherited

source/UrlTile.js, line 98

Return the tile load function of the source.

Returns:
TileLoadFunction

getTileUrlFunction(){module:ol/Tile~UrlFunction} inherited

source/UrlTile.js, line 107

Return the tile URL function of the source.

Returns:
TileUrlFunction

getUrls(){!Array.<string>|null} inherited

source/UrlTile.js, line 120

Return the URLs used for this source. When a tileUrlFunction is used instead of url or urls, null will be returned.

Returns:
URLs.

on(type, listener){module:ol/events~EventsKey|Array.<module:ol/events~EventsKey>} inherited

Observable.js, line 58

Listen for a certain type of event.

Name Type Description
type string | Array.<string>

The event type or array of event types.
listener function

The listener function.
Returns:
Unique key for the listener. If called with an array of event types as the first argument, the return will be an array of keys.

once(type, listener){module:ol/events~EventsKey|Array.<module:ol/events~EventsKey>} inherited

Observable.js, line 80

Listen once for a certain type of event.

Name Type Description
type string | Array.<string>

The event type or array of event types.
listener function

The listener function.
Returns:
Unique key for the listener. If called with an array of event types as the first argument, the return will be an array of keys.

refresh() inherited

source/Source.js, line 154

Refreshes the source. The source will be cleared, and data from the server will be reloaded.

set(key, value, opt_silent) inherited

Object.js, line 165

Sets a value.

Name Type Description
key string

Key name.
value *

Value.
silent boolean

Update without triggering an event.

setAttributions(attributions) inherited

source/Source.js, line 165

Set the attributions of the source.

Name Type Description
attributions module:ol/source/Source~AttributionLike | undefined

Attributions. Can be passed as string, Array<string>, module:ol/source/Source~Attribution, or undefined.

setProperties(values, opt_silent) inherited

Object.js, line 185

Sets a collection of key-value pairs. Note that this changes any existing properties and adds new ones (it does not remove any existing properties).

Name Type Description
values Object.<string, *>

Values.
silent boolean

Update without triggering an event.

setRenderReprojectionEdges(render)

source/TileImage.js, line 431

Sets whether to render reprojection edges or not (usually for debugging).

Name Type Description
render boolean

Render the edges.

setTileGridForProjection(projection, tilegrid)

source/TileImage.js, line 457

Sets the tile grid to use when reprojecting the tiles to the given projection instead of the default tile grid for the projection.

This can be useful when the default tile grid cannot be created (e.g. projection has no extent defined) or for optimization reasons (custom tile size, resolutions, ...).

Name Type Description
projection module:ol/proj~ProjectionLike

Projection.
tilegrid module:ol/tilegrid/TileGrid~TileGrid

Tile grid to use for the projection.

setTileLoadFunction(tileLoadFunction) inherited

source/UrlTile.js, line 156

Set the tile load function of the source.

Name Type Description
tileLoadFunction module:ol/Tile~LoadFunction

Tile load function.

setTileUrlFunction(tileUrlFunction, key) inherited

source/UrlTile.js, line 168

Set the tile URL function of the source.

Name Type Description
tileUrlFunction module:ol/Tile~UrlFunction

Tile URL function.
key string

Optional new tile key for the source.

setUrl(url) inherited

source/UrlTile.js, line 183

Set the URL to use for requests.

Name Type Description
url string

URL.

setUrls(urls) inherited

source/UrlTile.js, line 194

Set the URLs to use for requests.

Name Type Description
urls Array.<string>

URLs.

un(type, listener) inherited

Observable.js, line 101

Unlisten for a certain type of event.

Name Type Description
type string | Array.<string>

The event type or array of event types.
listener function

The listener function.

unset(key, opt_silent) inherited

Object.js, line 209

Unsets a property.

Name Type Description
key string

Key name.
silent boolean

Unset without triggering an event.