OutputQuantizationParameters | API Reference | ArcGIS Maps SDK for JavaScript 4.30

Used to project the geometry onto a virtual grid, likely representing pixels on the screen. Geometry coordinates are converted to integers by building a grid with a resolution matching the tolerance. Each coordinate is then snapped to one pixel on the grid.

See also

GraphQueryStreaming

Example

//sample implementation of an output quantization parameter

//query entities within a bounding box
const query = "MATCH (n) WHERE esri.graph.ST_Intersects($param_filter_geom, n.geometry) RETURN n"

KnowledgeGraphModule.executeQueryStreaming(
  knowledgeGraph,
  {
    openCypherQuery: query,
    bindParameters: {
      param_filter_geom: new Polygon({
        rings: [
          [
            [-89, -89],
            [89, -89],
            [89, 89],
            [-89, 89],
            [-89, -89],
          ],
        ],
      }),
    },
    outputQuantizationParameters: {
      extent: {
        xmax: 30,
        xmin: 20,
        ymax: 30,
        ymin: 20,
      },
      tolerance: 0.001,
      quantizeMode: "view",
    }
   }
  }
);

Constructors

OutputQuantizationParameters Constructor new OutputQuantizationParameters(properties)

Parameter

properties Object

optional

See the properties for a full list of the properties that may be passed into the constructor.

Property Overview

Any properties can be set, retrieved or listened to. See the Working with Properties topic.

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Type	Summary	Class
String	The name of the class.	Accessor
Object	An extent defining the quantization grid bounds.	OutputQuantizationParameters
String	Geometry coordinates are optimized for viewing and displaying of data.	OutputQuantizationParameters
Number	The size of one pixel in the units of the SpatialReference.	OutputQuantizationParameters

Property Details

declaredClass Inherited Property declaredClass Stringreadonly Inherited from Accessor

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

extent Property extent Object

An extent defining the quantization grid bounds. Its SpatialReference matches the input geometry spatial reference if one is specified for the query. Otherwise, the extent will be in the layer's spatial reference.

Properties: xmax Number

Maximum horizontal grid bounds.

xmin Number

Minimum horizontal grid bounds.

ymax Number

Maximum vertical grid bounds.

ymin Number

Minimum vertical grid bounds.

quantizeMode Property quantizeMode String

Geometry coordinates are optimized for viewing and displaying of data. The view value specifies that geometry coordinates should be optimized for viewing and displaying of data. The edit value specifies that full-resolution geometries should be returned, which can support lossless editing.

Possible Values:"view" |"edit"

tolerance Property tolerance Number

The size of one pixel in the units of the SpatialReference. This number is used to convert coordinates to integers by building a grid with a resolution matching the tolerance. Each coordinate is then snapped to one pixel on the grid. Consecutive coordinates snapped to the same pixel are removed for reducing the overall response size. The units of tolerance will match the units of spatial reference. If outSpatialReference is not specified, then tolerance is assumed to be in the units of the spatial reference of the layer. If tolerance is not specified, a 10,000 * 10,000 grid is used by default.

Method Overview

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Return Type	Summary	Class
	Adds one or more handles which are to be tied to the lifecycle of the object.	Accessor
Boolean	Returns true if a named group of handles exist.	Accessor
	Removes a group of handles owned by the object.	Accessor

Method Details

addHandles Inherited Method addHandles(handleOrHandles, groupKey) Inherited from Accessor

Adds one or more handles which are to be tied to the lifecycle of the object. The handles will be removed when the object is destroyed.

// Manually manage handles
const handle = reactiveUtils.when(
  () => !view.updating,
  () => {
    wkidSelect.disabled = false;
  },
  { once: true }
);

this.addHandles(handle);

// Destroy the object
this.destroy();

Parameters

handleOrHandles WatchHandle|WatchHandle []

Handles marked for removal once the object is destroyed.

groupKey *

optional

Key identifying the group to which the handles should be added. All the handles in the group can later be removed with Accessor.removeHandles(). If no key is provided the handles are added to a default group.

hasHandles Inherited Method hasHandles(groupKey){Boolean} Inherited from Accessor

Returns true if a named group of handles exist.

Parameter

groupKey *

optional

A group key.

Returns

Type	Description
Boolean	Returns `true` if a named group of handles exist.

Example

// Remove a named group of handles if they exist.
if (obj.hasHandles("watch-view-updates")) {
  obj.removeHandles("watch-view-updates");
}

removeHandles Inherited Method removeHandles(groupKey) Inherited from Accessor

Removes a group of handles owned by the object.

Parameter

groupKey *

optional

A group key or an array or collection of group keys to remove.

Example

obj.removeHandles(); // removes handles from default group

obj.removeHandles("handle-group");
obj.removeHandles("other-handle-group");