Class: DataTileSource

ol/source/DataTile~DataTileSource


import DataTileSource from 'ol/source/DataTile';

A source for typed array data tiles.

new DataTileSource(options)

Name Type Description
loader Loader | undefined

Data loader. Called with z, x, and y tile coordinates. Returns data for a tile or a promise for the same.

attributions AttributionLike | undefined

Attributions.

attributionsCollapsible boolean (defaults to true)

Attributions are collapsible.

maxZoom number (defaults to 42)

Optional max zoom level. Not used if tileGrid is provided.

minZoom number (defaults to 0)

Optional min zoom level. Not used if tileGrid is provided.

tileSize number | Size (defaults to [256, 256])

The pixel width and height of the source tiles. This may be different than the rendered pixel size if a tileGrid is provided.

gutter number (defaults to 0)

The size in pixels of the gutter around data tiles to ignore. This allows artifacts of rendering at tile edges to be ignored. Supported data should be wider and taller than the tile size by a value of 2 x gutter.

maxResolution number | undefined

Optional tile grid resolution at level zero. Not used if tileGrid is provided.

projection ProjectionLike (defaults to 'EPSG:3857')

Tile projection.

tileGrid TileGrid | undefined

Tile grid.

opaque boolean (defaults to false)

Whether the layer is opaque.

state State | undefined

The source state.

wrapX boolean (defaults to false)

Render tiles beyond the antimeridian.

transition number | undefined

Transition time when fading in new tiles (in miliseconds).

bandCount number (defaults to 4)

Number of bands represented in the data.

interpolate boolean (defaults to false)

Use interpolated values when resampling. By default, the nearest neighbor is used when resampling.

Fires:

Subclasses

Extends

Methods

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

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

dispatchEvent(event){boolean | undefined} inherited

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 BaseEvent | string

Event object.

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

Gets a value.

Name Type Description
key string

Key name.

Returns:
Value.

Get the attribution function for the source.

Returns:
Attribution function.

getAttributionsCollapsible(){boolean} inherited

Returns:
Attributions are collapsible.

getKeys(){Array.<string>} inherited

Get a list of object property names.

Returns:
List of property names.

getProjection(){Projection | null} inherited

Get the projection of the source.

Returns:
Projection.

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

Get an object of all property names and values.

Returns:
Object.

getRevision(){number} inherited

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

Returns:
Revision.

Get the state of the source, see State for possible states.

Returns:
State.

getTileGrid(){TileGrid | null} inherited

Return the tile grid of the tile source.

Returns:
Tile grid.

on(type, listener){EventsKey | Array<EventsKey>} inherited

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){EventsKey | Array<EventsKey>} inherited

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.

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

set(key, value, silent) inherited

Sets a value.

Name Type Description
key string

Key name.

value *

Value.

silent boolean | undefined

Update without triggering an event.

setAttributions(attributions) inherited

Set the attributions of the source.

Name Type Description
attributions AttributionLike | undefined

Attributions. Can be passed as string, Array<string>, Attribution, or undefined.

setProperties(values, silent) inherited

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 | undefined

Update without triggering an event.

un(type, listener) inherited

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, silent) inherited

Unsets a property.

Name Type Description
key string

Key name.

silent boolean | undefined

Unset without triggering an event.