import "@arcgis/map-components/components/arcgis-direct-line-measurement-3d";
The Direct Line Measurement 3D component can be added to a Scene component to calculate and display vertical, horizontal, and direct distances between two points.
How distances are computed depends on the scene's spatial reference.
In geographic coordinate systems (GCS) and in Web Mercator:
- Direct distance is computed in a Euclidean manner, in an ECEF coordinate system (or equivalent on other planets);
- Horizontal distance is computed geodetically, taking into consideration the curvature of the planet;
- Vertical distance is computed as an elevation difference.
In projected coordinate systems (PCS), apart from Web Mercator, all three distances (direct, horizontal, and vertical) are computed in a Euclidean manner (in their respective PCS).
Direct Line Measurement 3D component visualizes and labels the direct, horizontal, and vertical distances and displays the same values in the UI panel. When the distance between the points is greater than 100 kilometers, the measurement visualization is simplified, and only the horizontal and vertical distances are calculated. The direct distance option becomes unavailable.
When the component is active, a horizontal "laser" line is drawn which indicates the height at the current mouse position. This line can help in analyzing the heights of objects relative to each other and the terrain. A second laser line shows the intersection of the scene with the vertical plane that passes through the checkered line.
Things to consider
- Direct Line Measurement 3D is designed to work in the Scene component. For measurements in the Map component, use Distance Measurement 2D.
- Snapping is enabled by default. This can be temporarily disabled by holding the
CTRL
key. - Layer types currently supported for snapping are: FeatureLayer, GraphicsLayer (except Mesh geometries), GeoJSONLayer, WFSLayer, CSVLayer, 3D Object SceneLayer, and BuildingSceneLayer.
See also
- DirectLineMeasurementAnalysis
- Sample - Measurement in 3D
- Sample - Analysis objects
- Sample - Color theming for interactive tools
Demo
Properties
Property | Attribute | Type |
---|---|---|
| ||
auto-destroy-disabled | boolean | |
icon | string | |
label | string | |
position | "bottom-leading" | "bottom-left" | "bottom-right" | "bottom-trailing" | "manual" | "top-leading" | "top-left" | "top-right" | "top-trailing" | |
reference-element | ||
state readonly | state | "disabled" | "measured" | "measuring" | "ready" |
unit | "centimeters" | "decimeters" | "feet" | "imperial" | "inches" | "kilometers" | "meters" | "metric" | "miles" | "millimeters" | "nautical-miles" | "us-feet" | "yards" | |
| Array<"imperial" | "metric" | "millimeters" | "centimeters" | "decimeters" | "meters" | "kilometers" | "inches" | "feet" | "yards" | "miles" | "nautical-miles" | "us-feet"> |
analysis
analysis: DirectLineMeasurementAnalysis
The DirectLineMeasurementAnalysis created or modified by the component.
When connecting the Direct Line Measurement 3D component to the Scene component, it automatically creates an empty analysis and adds it to the Scene's analyses collection. Whenever the component is destroyed, the analysis is automatically removed from the collection.
Alternatively, a programmatically created analysis can be provided to the component. Then, the application itself needs to add it to and later remove it from the Scene's analyses collection.
// Create the analysis.
const directLineAnalysis = new DirectLineMeasurementAnalysis({
startPoint: new Point({
spatialReference: { latestWkid: 3857, wkid: 102100 },
x: -13624995.61798748,
y: 4550334.030096778,
z: 63.378210234455764
}),
endPoint: new Point({
spatialReference: { latestWkid: 3857, wkid: 102100 },
x: -13624921.53589075,
y: 4550407.42357004,
z: 63.3783810287714
}),
});
// Get the Scene and measurement component and wait until they are ready.
const viewElement = document.querySelector("arcgis-scene");
await viewElement.viewOnReady();
const directLineMeasurement3d = document.querySelector("arcgis-direct-line-measurement-3d");
await directLineMeasurement3d.componentOnReady();
// Add the analysis to the Scene component.
viewElement.analyses.add(directLineAnalysis);
// Connect the analysis to the measurement component:
directLineMeasurement3d.analysis = directLineAnalysis;
autoDestroyDisabled
autoDestroyDisabled: boolean
If true, the component will not be destroyed automatically when it is disconnected from the document. This is useful when you want to move the component to a different place on the page, or temporarily hide it. If this is set, make sure to call the destroy method when you are done to prevent memory leaks.
- Attribute
- auto-destroy-disabled
- Default value
- false
icon
icon: string
Icon which represents the component. Typically used when the component is controlled by another component (e.g. by the Expand component).
- See also
- Attribute
- icon
- Default value
- "measure-line"
position
position: "bottom-leading" | "bottom-left" | "bottom-right" | "bottom-trailing" | "manual" | "top-leading" | "top-left" | "top-right" | "top-trailing"
- Attribute
- position
- Default value
- "bottom-left"
referenceElement
referenceElement: HTMLArcgisLinkChartElement | HTMLArcgisMapElement | HTMLArcgisSceneElement | string
By assigning the id
attribute of the Map or Scene component to this property, you can position a child component anywhere in the DOM while still maintaining a connection to the Map or Scene.
- Attribute
- reference-element
state
state: "disabled" | "measured" | "measuring" | "ready"
The component's state. The values mean the following:
disabled
- not ready yetready
- ready for measuringmeasuring
- currently measuringmeasured
- measuring has finished
- Attribute
- state
unit
unit: "centimeters" | "decimeters" | "feet" | "imperial" | "inches" | "kilometers" | "meters" | "metric" | "miles" | "millimeters" | "nautical-miles" | "us-feet" | "yards"
Unit system (imperial, metric) or specific unit used for displaying the distance values. Possible values are listed in unitOptions.
- Attribute
- unit
unitOptions
unitOptions: Array<"imperial" | "metric" | "millimeters" | "centimeters" | "decimeters" | "meters" | "kilometers" | "inches" | "feet" | "yards" | "miles" | "nautical-miles" | "us-feet">
List of available units and unit systems (imperial, metric) that are shown in the component's dropdown.
By default, the following units are included: metric
, imperial
, inches
, feet
, us-feet
, yards
, miles
, nautical-miles
, meters
, kilometers
.
Possible unit values can only be a subset of this list.
Slots
Events
Event | Type |
---|---|
CustomEvent<{ name: "state" | "analysis"; }> | |
CustomEvent<void> |
arcgisPropertyChange
arcgisPropertyChange: CustomEvent<{ name: "state" | "analysis"; }>
Emitted when the value of a property is changed. Use this to listen to changes to properties.
Events triggered on this element will be propagated to their outermost elements.
The event is composable and will propagate across the shadow DOM into the standard DOM.
The event's default behavior can be canceled, allowing for custom behavior to be implemented instead.
arcgisReady
arcgisReady: CustomEvent<void>
Emitted when the component associated with a map or scene view is is ready to be interacted with.
Events triggered on this element will be propagated to their outermost elements.
The event is composable and will propagate across the shadow DOM into the standard DOM.
The event's default behavior can be canceled, allowing for custom behavior to be implemented instead.
Methods
Method | Signature |
---|---|
clear(): Promise<void> | |
componentOnReady(): Promise<void> | |
destroy(): Promise<void> | |
start(): Promise<void> |
componentOnReady
componentOnReady(): Promise<void>
Create a promise that resolves once component is fully loaded.
Example
const arcgisDirectLineMeasurement3d = document.querySelector("arcgis-direct-line-measurement-3d");
document.body.append(arcgisDirectLineMeasurement3d);
await arcgisDirectLineMeasurement3d.componentOnReady();
console.log("arcgis-direct-line-measurement-3d is ready to go!");
- Returns
- Promise<void>