import RelationParameters from "@arcgis/core/rest/support/RelationParameters.js";const RelationParameters = await $arcgis.import("@arcgis/core/rest/support/RelationParameters.js");- Inheritance:
- RelationParameters→
Accessor
- Since
- ArcGIS Maps SDK for JavaScript 4.0
Sets the relation and other parameters for the relation() operation.
Constructors
Constructor
Parameters
| Parameter | Type | Description | Required |
|---|---|---|---|
| properties | | |
Properties
| Property | Type | Class |
|---|---|---|
declaredClass readonly inherited | ||
GeometryUnion[] | null | undefined | | |
GeometryUnion[] | null | undefined | | |
| | ||
| |
geometries1
- Type
- GeometryUnion[] | null | undefined
The first array of geometries to compute the relation. The structure of each geometry in the array is same as the structure of the json geometry objects returned by the ArcGIS REST API.
geometries2
- Type
- GeometryUnion[] | null | undefined
The second array of geometries to compute the relation. The structure of each geometry in the array is same as the structure of the json geometry objects returned by the ArcGIS REST API.
relation
- Type
- "cross" | "disjoint" | "in" | "interior-intersection" | "intersection" | "line-coincidence" | "line-touch" | "overlap" | "point-touch" | "relation" | "touch" | "within" | null | undefined
The spatial relationship to be tested between the two input geometry arrays. See table below for a list of possible values.
If the relation is specified as relation, the relationParameter parameter describes the spatial
relationship and must be specified.
| Value | Description |
|---|---|
| cross | Two polylines cross if they share only points in common, at least one of which is not an endpoint. A polyline and an polygon cross if they share a polyline in common on the interior of the polygon which is not equivalent to the entire polyline. Cross is a Clementini operator. If either one of the geometries is empty, the geometries do not cross. |
| disjoint | Two geometries are disjoint if their intersection is empty. Two geometries intersect if disjoint is "false". |
| in | The base geometry is within the comparison geometry if the base geometry is the intersection of the geometries and the intersection of their interiors is not empty. An empty geometry is within another geometry, unless the other geometry is empty. |
| interior-intersection | Geometries intersect excluding boundary touch. |
| intersection | Geometry interiors intersect or boundaries touch, same as 'not disjoint'. |
| line-coincidence | The boundaries of the geometries must share an intersection, but the relationship between the interiors of the shapes is not considered (they could overlap, one could be contained in the other, or their interiors could be disjoint). This relation applies to polylines and polygons. |
| line-touch | Two geometries are said to touch when the intersection of the geometries is non-empty, but the intersection of their interiors is empty. This evaluates if the touch occurs along a boundary (not a point). Valid for polygons. |
| overlap | Two polylines share a common sub-line, or two polygons share a common sub-area. Two geometries do not overlap if either one is empty. |
| point-touch | Two geometries are said to touch when the intersection of the geometries is non-empty, but the intersection of their interiors is empty. This evaluates if the touch occurs at a point (not a boundary). |
| relation | Allows specification of any relationship defined using the Shape Comparison Language. If this value is used, a value for relationParameter must be specified. |
| touch | The union of point touch and line touch. Two geometries are said to touch when the intersection of the geometries is non-empty, but the intersection of their interiors is empty. For example, a point touches a polyline only if the point is coincident with one of the polyline end points. If either one of the two geometries is empty, the geometries are not touched. |
| within | Same as in but also allows polylines that are strictly on the boundaries of polygons to be considered in the polygon. |
relationParameter
The string describes the spatial relationship to be tested when RelationParameters.relation = 'relation'.
The Relational functions for ST_Geometry topic has additional details.
An example of a valid string is: FFFTTT**.
Also see the description of relateOperator for
additional examples of valid strings.
Methods
fromJSON
- Signature
-
fromJSON (json: any): any
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.
Parameters
| Parameter | Type | Description | Required |
|---|---|---|---|
| json | A 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
- any
Returns a new instance of this class.
toJSON
- Signature
-
toJSON (): any
Converts an instance of this class to its ArcGIS portal JSON representation. See the Using fromJSON() guide topic for more information.
- Returns
- any
The ArcGIS portal JSON representation of an instance of this class.