Class: Provider

H .service .omv.Provider

new H.service.omv.Provider (service, style, opt_options)

This class represents a provider for continuous fetching of HERE Optimized Map Visualization (OMV) tiles.

Note that as this provider provides vector data, it can be used only with a vector rendering engine (see H.Map.Options#engineType).

Use one of the raster layers (e.g. raster.normal.map) created by H.service.Platform#createDefaultLayers when using the P2D engine.

Name	Type	Description
`service`	H.service.omv.Service	An object representing the OMV service.
`style`	H.map.render.Style.<!Object>	The style to use for rendering data provided by the provider.
`opt_options`	H.service.omv.Provider.Options	optional The options to instantiate the provider

Throws:

in case of invalid service or style

Example

// Assumption: the platform is instantiated
var config = `
  sources:
    omv:
      type: OMV
  layers:
    road:
      data: {source: omv}
      draw:
        lines:
          order: 340
          width: 10
          color: blue
    `;
map.addLayer(
    new H.map.layer.TileLayer(
        new H.service.omv.Provider(platform.getOMVService(), new H.map.render.webgl.Style(config))));

Extends

H.map.provider.RemoteTileProvider

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.

providesOMV inherited overrides

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.

tileSize number inherited

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.

Name	Type	Description
`type`	string	The name of the event
`handler`	function	An event handler function
`opt_capture`	boolean	optional `true` indicates that the method should listen in the capture phase (bubble otherwise)
`opt_scope`	Object	optional An object defining the scope for the handler function

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) inherited

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

Name	Type	Description
`x`	number	The tile coordinate on x-axis (column index)
`y`	number	The tile coordinate on y-axis (row index)
`z`	number	The tile zoom level

cancelTileByKey (tileKey) inherited

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 inherited

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

Name	Type	Description
`x`	number	The tile coordinate on x-axis (column index)
`y`	number	The tile coordinate on y-axis (row index)
`z`	number	The tile zoom level
`data`	HTMLImageElement \| HTMLCanvasElement \| Object	A data that represents the tile
`opt_options`	Object.<string, *>	optional The options to configure the tile-specific rendering

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.

getCache ()H.util.ICache inherited overrides

This method retrieves a tile cache of this provider.

Returns:

Type	Description
H.util.ICache	An object representing a tile cache

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

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

getPoliticalView ()string | undefined

Returns geopolitical view of the map data. This method is applicable only if engineType of the provider is set to H.Map.EngineType.HARP.

Returns:

Type	Description
string \| undefined	Geopolitical view in ISO 3166-1 alpha-2 standard.

getStyle ()H.map.render.Style.<!Object>

To obtain the style used for rendering the provider data.

Returns:

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

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

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

Returns:

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

getTileKey (x, y, z)string inherited overrides

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".

Name	Type	Description
`x`	number	The x tile coordinate (column)
`y`	number	The y tile coordinate (row)
`z`	number	The tile zoom level

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`)

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`)

reload (hard) inherited

This method instructs the provider to reload data from its source.

Two reload modes are possible:

hard: This mode immediately removes tiles from the tile cache and forces the provider to re-fetch them. Currently cached tiles are not used for rendering.
soft: This mode only marks tiles as invalid and requests the tiles to be re-fetched as soon as possible. The provider does not invalidate the cache immediately. This means that cached tiles can still be rendered while the updated tiles are fetched.

Name	Type	Description
`hard`	boolean	A Boolean flag indicating whether to invalidate in `hard` mode (`true`) or in `soft` mode (`false`);

removeEventListener (type, handler, opt_capture, opt_scope) inherited

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

Name	Type	Description
`type`	string	The name of the event
`handler`	function	A previously added event handler
`opt_capture`	boolean	optional `true` indicates that the method should listen in the capture phase (bubble otherwise)
`opt_scope`	Object	optional An object defining the scope for the handler function

requestInternal (x, y, z, onResponse, onError, opt_priority)H.util.ICancelable inherited overrides

To request a tile from a remote service. This method must be implemented by deriving classes.

Name	Type	Description
`x`	number	The row number of the tile
`y`	number	The column number of the tile
`z`	number	The zoom level for which the tile is requested
`onResponse`	function((?Array.<!H.map.Object>\|HTMLImageElement\|HTMLCanvasElement\|ArrayBuffer\|Object), *=)	A function which is called when a response arrives
`onError`	function(Error)	A function which is called on a communication error
`opt_priority`	H.util.Job.Priority	optional An optional request priority level

Returns:

Type	Description
H.util.ICancelable	An object implementing `ICancelable`

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

This method requests data for a tile.

Name	Type	Description
`x`	number	The tile coordinate on x-axis (column index)
`y`	number	The tile coordinate on y-axis (row index)
`z`	number	The zoom level for which the tile is requested
`cacheOnly`	boolean	A value indicating whether only cached tiles are to be considered (`true`) or not (`false`)

Returns:

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

setPoliticalView (politicalView)

Sets geopolitical view of the map data. This method is applicable only if engineType of the provider is set to H.Map.EngineType.HARP.

Name	Type	Description
`politicalView`	string	The geopolitical view in ISO 3166-1 alpha-2 standard.

setStyle (style)

Sets the style to be used for rendering the provider data.

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

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.service.omv.Provider.Options Object

This object contains configuration options for a TileProvider instance.

Properties:

Name	Type	Argument	Description
`uri`	string	<optional>	The provider's unique resource identifier which must not contain an underscore `"_"`. If omitted, an auto-generated unique Session ID is used. If a consistent ID across sessions is needed (for example for storing provider data), this property must be specified.
`min`	number	<optional>	The minimum supported zoom level, the default is `2`.
`max`	number	<optional>	The maximum supported zoom level, the default is `22`.
`getCopyrights`	function	<optional>	A function to replace the default implementation of `H.map.provider.Provider#getCopyrights`.
`engineType`	H.Map.EngineType	<optional>	The engine type in use, it is used to return the proper format of the provider's default style. Default is `H.Map.EngineType.WEBGL`.
`tileSize`	number	<optional>	The size of a tile given as edge length in pixels. Its value must be 2^n, where n is in range `[0 ... 30]`, default is `512`.
`politicalView`	string	<optional>	The geopolitical view of the map data in ISO 3166-1 alpha-2 standard. The default value corresponds to the international geopolitical view.
`lg`	string	<optional>	An identifier of the primary language, the default is not specified
`lg2`	string	<optional>	An identifier of the secondary language, the default is not specified
`pois`	boolean	<optional>	A value indicating if POIs are displayed on the map `true`. By default POIs are disabled.

Events

update inherited

Event fired when this provider's data updates.

Type:

H.util.DataEvent