A dimensional definition defines a filter based on one variable and one dimension. You can filter with one or multiple dimensional slices. Instances of this class are typically used when filtering data based on slices or ranges in one or more dimensions with MosaicRule.
For example, a single ImageryLayer may have a depth dimension storing
sea temperatures for the same pixel location at various depths. Another dimension
could be time, where the same pixel stores multiple values based on a window
of time.
The sample in the image below renders sea temperature at the surface for a specific time in the year.
let multidimensionalDefinition = [];
multidimensionalDefinition.push(new DimensionalDefinition({
variableName: "water_temp",
dimensionName: "StdZ", // water depth
values: [0], // sea surface or 0ft
isSlice: true
}));
let mosaicRule = new MosaicRule();
mosaicRule.multidimensionalDefinition = multidimensionalDefinition;
In contrast, the following image renders sea temperature data from the same service at 5000 meters below the surface within the same time window.
let multidimensionalDefinition = [];
multidimensionalDefinition.push(new DimensionalDefinition({
variableName: "water_temp",
dimensionName: "StdZ", // water depth
values: [-5000], // 5000 m below
isSlice: true
}));
let mosaicRule = new MosaicRule();
mosaicRule.multidimensionalDefinition = multidimensionalDefinition;
See the hasMultidimensions property of the ImageryLayer to check if the layer stores data for one or more variables in multiple dimensions. If it does, then the multidimensionalInfo property of the layer will contain the dimension names and values that may be used in the filters.
// display the pixels containing salinity values between -10 and 10
let definition = new DimensionalDefinition({
variableName: "Salinity",
dimensionName: "StdZ",
values: [-10,10],
isSlice: false
});Constructors
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new DimensionalDefinition(properties)
-
Parameter:properties Objectoptional
See the properties for a list of all the properties that may be passed into the constructor.
Property Overview
| Name | Type | Summary | Class | |
|---|---|---|---|---|
| String | more details The name of the class. | more details | Accessor | |
| String | more details The dimension associated with the variable. | more details | DimensionalDefinition | |
| Boolean | more details Indicates whether the values indicate slices (rather than ranges). | more details | DimensionalDefinition | |
| Array<(number|Array<number>)> | more details An array of single values or tuples [min, max] each defining a range of valid values along the specified dimension. | more details | DimensionalDefinition | |
| String | more details The required variable name by which to filter. | more details | DimensionalDefinition |
Property Details
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Since: ArcGIS API for JavaScript 4.7
-
The name of the class. The declared class name is formatted as
esri.folder.className.
-
dimensionName String
-
The dimension associated with the variable.
-
isSlice Boolean
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Indicates whether the values indicate slices (rather than ranges).
- Default Value:false
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An array of single values or tuples [min, max] each defining a range of valid values along the specified dimension.
Example:// -10 is the minimum valid value and 10 is the maximum valid value definition.values = [[-10, 10]];
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variableName String
-
The required variable name by which to filter.
Method Overview
| Name | Return Type | Summary | Class | |
|---|---|---|---|---|
| DimensionalDefinition | more details Creates a clone of the DimensionalDefinition object. | more details | DimensionalDefinition | |
| * | more details Creates a new instance of this class and initializes it with values from a JSON object generated from an ArcGIS product. | more details | DimensionalDefinition | |
| Object | more details Converts an instance of this class to its ArcGIS portal JSON representation. | more details | DimensionalDefinition |
Method Details
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clone(){DimensionalDefinition}
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Creates a clone of the DimensionalDefinition object.
Returns:Type Description DimensionalDefinition A clone of the object that invoked this method. Example:// Creates a clone of the DimensionalDefinition let dimensionalDefinition1 = dimensionalDefinition.clone();
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fromJSON(json){*}static
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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
jsonparameter 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.Parameter:json ObjectA JSON representation of the instance in the ArcGIS format. See the ArcGIS REST API documentation for examples of the structure of various input JSON objects.
Returns:Type Description * Returns a new instance of this class.
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toJSON(){Object}
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Converts an instance of this class to its ArcGIS portal JSON representation. See the Using fromJSON() guide topic for more information.
Returns:Type Description Object The ArcGIS portal JSON representation of an instance of this class.