TileInfo

Since

ArcGIS Maps SDK for JavaScript 4.7

The name of the class. The declared class name is formatted as esri.folder.className.

The dots per inch (DPI) of the tiling scheme. If a DPI is chosen that does not match the resolution of the output device, the scale of the map tile will appear incorrect. The default value is 96.

Image format of the cached tiles.

Since

ArcGIS Maps SDK for JavaScript 4.5

Indicates if the tiling scheme supports wrap around.

An array of levels of detail that define the tiling scheme.

The tiling scheme origin. The upper left corner of the tiling scheme, in coordinates of the spatial reference of the source data.

Size of tiles in pixels.

// sets the height and width of each tile to [ 256, 256 ]
tileInfo.size = 256;

The spatial reference of the tiling schema.

A convenience method used to create a new TileInfo instance with preset properties like lods. Optionally, properties such as size, scales[], and a [SpatialReference](https://developers.arcgis.com/javascript/latest/references/core/geometry/SpatialReference/) can also be set to calculate lods for each TileInfo. This is useful in cases where the default amount of LODs provided are not sufficient. For example, if wanting to set the view's scale 1

, additional LODs must be created. An example of setting this scale and creating additional LODs is provided in the example snippet below.

See also

• MapView.constraints

// This snippet shows how to create a TileInfo instance using the default
// settings and passing its resulting LODs to a MapView's constraints

let view = new MapView({
  container: "viewDiv",
  map: map,
  constraints: {
    lods: TileInfo.create().lods
  }
});

// This snippet shows how to set the MapView scale 1:1 while generating additional LODs for the MapView.constraints.
const spatialReference = new SpatialReference({
  wkid: 2154
});

const center = new Point({
  x: 0,
  y: 0,
  spatialReference
});

// Create LODs from level 0 to 31
const tileInfo = TileInfo.create({
  spatialReference,
  numLODs: 32
});

const lods = tileInfo.lods;

let view = new MapView({
  container: "viewDiv",
  map,
  scale: 1,
  center,
  spatialReference,
  constraints: {
    lods: lods,
    snapToZoom: false
  }
});

Creates a new instance of this class and initializes it with values from a JSON object generated from an ArcGIS product. The object passed into the input json parameter often comes from a response to a query operation in the REST API or a toJSON() method from another ArcGIS product. See the Using fromJSON() topic in the Guide for details and examples of when and how to use this function.

Utility method used to convert a scale value to its corresponding zoom value.

// get the zoom value for the vector tile layer at the given scale
// then set the view.zoom to match layer's zoom level.
view.when(function(){
  view.zoom = layer.tileInfo.scaleToZoom(9027);
});

Converts an instance of this class to its ArcGIS portal JSON representation. See the Using fromJSON() guide topic for more information.

Utility method used to convert a zoom value to its corresponding scale value.

// get the scale value for the vector tile layer at the view zoom level
// then set the view.scale to match layer's scale.
view.when(function(){
  view.scale = vectorLayer.tileInfo.zoomToScale(view.zoom);
});