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HERE Maps API for JavaScript - API Reference

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HERE Maps API for JavaScript - API Reference: Class: TileProvider

Table of Contents

Class: TileProvider

H.map.provider.TileProvider

new H.map.provider.TileProvider (options) abstract

TileProvider is an abstract class to provide tile data.

Name Type Description
options H.map.provider.TileProvider.Options

The options to instantiate the given TileProvider

Extends

Members

max number inherited

This property holds a value indicating the maximum zoom level at which the given provider can serve data. The value is set at construction time.

min number inherited

This property holds a value indicating the minimum zoom level at which the given provider can serve data. The value is set at construction time.

tileSize number

This property holds the size of a tile representing edge length in pixels. Its value must be 2^n where n is in range [0…30], default is 256.

uid string inherited

This property holds the unique identifier for the provider instance. The value is generated at construction time.

uri string inherited

This property holds the provider's unique resource identifier. If it is not provided at construction time, it defaults to provider's uid.

Methods

addEventListener (type, handler, opt_capture, opt_scope) inherited

This method adds a listener for a specific event.

Note that to prevent potential memory leaks, you must either call removeEventListener or dispose on the given object when you no longer need it.

addOnDisposeCallback (callback, opt_scope) inherited

This method adds a callback which is triggered when the EventTarget object is being disposed.

Name Type Description
callback function

The callback function.

opt_scope Object optional

An optional scope for the callback function

cancelTile (x, y, z) abstract

This method cancels a tile request, using the caller-supplied tile coordinates.

cancelTileByKey (tileKey) abstract

This method cancels a tile request, using a tile key.

Name Type Description
tileKey string

The key identifying the tile

createTileInternal (x, y, z, data, opt_options)H.map.provider.Tile abstract

The internal method to create a tile. It must be overridden by sub-classes.

Returns:
Type Description
H.map.provider.Tile The created tile

dispatchEvent (evt) inherited

This method dispatches an event on the EventTarget object.

Name Type Description
evt H.util.Event | string

An object representing the event or a string with the event name

dispose () inherited

This method removes listeners from the given object. Classes that extend EventTarget may need to override this method in order to remove references to DOM Elements and additional listeners.

getCopyrights (boundingBox, level)Array.<!H.map.ICopyright> inherited

This method retrieves the copyrights for the provided content for a certain geographical area and zoom level.

Note: This function may be overridden by H.map.provider.Provider.Options getCopyrights property. The default implementation returns null.

Name Type Description
boundingBox H.geo.Rect

The rectangular area for which to retrieve the copyright information

level number

The zoom level for which to retrieve the copyright information

Returns:
Type Description
Array.<!H.map.ICopyright> A list of copyright information objects for the provided area and zoom level

getStyleInternal ()H.map.render.Style.<!Object> inherited

This methods returns the style used to render the provider data.

Returns:
Type Description
H.map.render.Style.<!Object>

getTileKey (x, y, z)string

This method creates a tile key consisting of the provider's URI, and the x, y and z coordinates of the tile, separated by underscores, for example "4711_7_42_23".

Returns:
Type Description
string A string containing the tile key

providesDomMarkers ()boolean inherited

This method checks whether this provider will provide DomMarker map objects. A concrete implementation of Provider must override it if it will provide DomMarkers.

Returns:
Type Description
boolean A value indicating if the given provider provides DomMarkers (true) or not (false)

providesGeoJSON ()boolean inherited

This method checks whether this provider will provide data in GeoJSON format. A concrete implementation of Provider must override it if it will provide GeoJSON data.

Returns:
Type Description
boolean A value indicating if the given provider provides GeoJSON data (true) or not (false)

providesMarkers ()boolean inherited

This method checks whether this provider will provide Marker map objects. A concrete implementation of Provider must override it if it will provide Markers.

Returns:
Type Description
boolean A value indicating if the given provider provides Markers (true) or not (false)

providesOMV ()boolean inherited

This method checks whether this provider will provide data in OMV format. A concrete implementation of Provider must override it if it will provide OMV data.

Returns:
Type Description
boolean A value indicating if the given provider provides OMV data (true) or not (false)

providesOverlays ()boolean inherited

This method checks whether this provider will provide overlay map objects. A concrete implementation of Provider must override it if it will provide overlays.

Returns:
Type Description
boolean true if the provider provides overlays, otherwise false

providesRasters ()boolean inherited

This method checks whether this provider will provide bitmap images as tiles. A concrete implementation of Provider must override it if it will provide raster tiles.

Returns:
Type Description
boolean A value indicating if the given provider provides raster tiles (true) or not (false)

providesSpatials ()boolean inherited

This method checks whether this provider will provide spatial map objects. A concrete implementation of Provider must override it if it will provide Spatials.

Returns:
Type Description
boolean A value indicating whether the provider provides map objects (true) or not (false)

removeEventListener (type, handler, opt_capture, opt_scope) inherited

This method removes a previously added listener from the EventTarget instance.

requestTile (x, y, z, cacheOnly)H.map.provider.Tile | undefined abstract

This method requests data for a tile.

Returns:
Type Description
H.map.provider.Tile | undefined The tile object if it can be obtained, otherwise undefined

setStyleInternal (style, opt_suppressChangeEvent) inherited

This method sets the style to be used to render the provider data.

Name Type Description
style H.map.render.Style.<!Object>

The style to use for rendering the provider data.

opt_suppressChangeEvent boolean optional

Flag to suppress firing of config change event.

Type Definitions

H.map.provider.TileProvider.Options Object

This object contains configuration options for a TileProvider instance.

Properties:

Events

update inherited

Event fired when this provider's data updates.

Type:
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