How to use the ArcGIS API for JavaScript?

How to use the ArcGIS API for JavaScript?

Since: ArcGIS API for JavaScript 4.0. The Legend widget displays labels and symbols for layers in a map. Labels and their corresponding symbols depend on the values set in the Renderer of the layer. The legend will only display layers and sublayers that are visible in the view. The legend automatically updates when.

How does the legend widget in ArcGIS work?

The legend widget watches this property to hide or display the layer’s legend when an ActiveLayerInfo is removed from or added to this collection. Indicates whether to show the Basemap layers in the Legend.

What happens when you add a layer in ArcGIS?

On my arcgis server manager there is a legend. When you’re adding one layer, as you’re doing, the map triggers the layer-add event. When adding a list of layers through map.addLayers (), it triggers the layers-add-result event.

How to show the basemap layers in the legend?

Indicates whether to show the Basemap layers in the Legend. If you set this property to true and specify layerInfos, the basemap layers you want included in the legend must also be specified in layerInfos. The ID or node representing the DOM element containing the widget. This property can only be set once.

The ArcGIS API for JavaScript provides bidirectional support. To enable right-to-left (RTL), set the dir attribute in the or tag to rtl. This will impact many aspects of the API, for example: Widget content. Themes.

Which is the latest version of ArcGIS for JavaScript?

Version 4.x of the ArcGIS API for JavaScript includes almost all capabilities that are part of 3.x along with many new innovations that are exclusive to 4.x; for example 3D visualization, map rotation, and deeper ArcGIS Enterprise and ArcGIS Online integration.

What does the resultgraphic indicate in ArcGIS API?

Indicates if the resultGraphic will display at the location of the selected feature. An array of objects, each containing a SearchResult from the search. Indicates whether to display the option to search all sources.

Is there an ArcGIS widget for JavaScript search?

Since: ArcGIS API for JavaScript 4.0 The Search widget provides a way to perform search operations on locator service (s), map / feature service feature layer (s), SceneLayers with an associated feature layer, BuildingComponentSublayer with an associated feature layer, GeoJSONLayer, CSVLayer, OGCFeatureLayer, and/or table (s).

ArcGIS DeveloperMenu Documentation Features Pricing Support Search Search Sign In ArcGIS API for JavaScriptAPI Reference Overview Sample Code API Reference Showcase Blog Menu esri Basemap Camera Color config geometry Graphic Ground intl kernel Map pointCloudRenderers PopupTemplate rasterRenderers renderers request

How to create a SQL expression in ArcGIS?

If you’re new to building SQL expressions, a helpful resource is About building an SQL expression in the ArcGIS Desktop Help. “Avg. Field Depth: ” + evt.graphic.attributes.AVGDEPTH + ” meters”;

How is a layer definition applied in ArcGIS?

In this example layer definitions are used to only display features that meet the specified critiera, in this case features with a value of ‘Yes’ for the PROD_GAS field. The following code creates a new feature layer, specifies the out fields and renderer, then applies the definition expression using the featureLayer.setDefinitionExpression method.

DateTimePickerInput RadioButtonsInput SwitchInput TextAreaInput TextBoxInput esri/geometry Circle coordinateFormatter Extent Geometry geometryEngine geometryEngineAsync HeightModelInfo Mesh Multipoint Point Polygon Polyline projection SpatialReference support geodesicUtils GeographicTransformation

How to create a circle in ArcGIS JavaScript?

Creates a rectangle graphic with a center at initial click, and dimensions based on the distance between the initial click to the cursor location. Creates a circle graphic with a radius based on the bounding box between the initial click and the cursor location. Combines the behavior described above.

How to make a rectangle in ArcGIS JavaScript?

Creates a rectangle graphic with dimensions based on the bounding box between initial click and cursor location. Creates a circle graphic with radius based on the distance between initial click and cursor location. Changes the shape from a rectangle to a square or from a circle to an ellipse.

How do you change the cursor in JavaScript?

This post shows how to change the cursor on a web page with Javascript by assigning a value to the document.body.style.cursor property. Assign one of the cursor properties to document.body.style.cursor to change the cursor. The first example below will change the cursor to an hourglass:

If you need access to capability not exposed via the classes in the ArcGIS API for JavaScript you can use esri/request to work directly with the ArcGIS Portal REST API. This sample demonstrates how to use the Generate operation to generate a feature collection from an input shapefile.

How to generate a shapefile in JavaScript?

This snippet calls the generate operation, note that the form used to capture the input shapefile is specified using the form parameter. When the generate operation successfully completes the addShapefileToMap function is executed that adds the feature collection to the map.

How to generate a feature collection from a shapefile?

This sample demonstrates how to use the Generate operation to generate a feature collection from an input shapefile. The application contains a form with an input element of type file that allows users to navigate to a zipped shapefile.

How to create a legend for a map?

Use the Legend widget to build a legend that displays some or all of the layers in the map. To create a new legend widget specify the map and the HTML element where the legend will display. Optionally you can provide a list of layers to display in the legend. If no layers are specified all the layers will display in the legend.

How to display layers in legend in JavaScript?

Optionally you can provide a list of layers to display in the legend. If no layers are specified all the layers will display in the legend. You can also set the respectCurrentMapScale parameter to true if you want the legend to only display layers that are visible in the current map scale.

Working with web maps. The ArcGIS API for JavaScript can work with web maps created using the ArcGIS.com map viewer. Use the map viewer to quickly and easily create and share maps. Web maps can contain layers from ArcGIS Server map, image and feature services, KML documents, and OGC web services.

How to create a map using ArcGIS.com?

To create a map using the ArcGIS.com web map id navigate to the details page for the web map. The web map’s ID is the value at the end of the URL of the details page.

How is a circle generated in ArcGIS JavaScript?

The circle is generated client side and is then used to query points that represent census blocks in the buffered area. Click on a point to see more information about the census block.

How to access spatial layers in ArcGIS API?

To access spatial layers, use the allLayers property instead. Specifies a basemap for the map. The basemap is a set of tile layers that give geographic context to the MapView or SceneView and the other operational layers in the map. This value can be an instance of Basemap or one of the strings listed in the table below.

This sample displays a map generated using the ArcGIS.com map viewer. The map’s author used the tools in the map viewer to select a basemap, add operational layers, define an initial extent and create popup windows.

What does a basemap do in ArcGIS JavaScript?

Specifies a basemap for the map. The basemap is a set of tile layers that give geographic context to the MapView or SceneView and the other operational layers in the map. This value can be an instance of Basemap or one of the strings listed in the table below. Use of these basemaps requires an ArcGIS Developer subscription.

Method Overview Name Return Type Summary classes () String more details A utility method used for b destroy () more details Destroys the widget instanc emit () Boolean more details Emits an event on the insta hasEventListener () Boolean more details Indicates whether there is

When to remove a widget from ArcGIS API?

Handles marked for removal once the widget is destroyed. This method is primarily used by developers when implementing custom widgets. Executes after widget is ready for rendering. This method is primarily used by developers when implementing custom widgets.

What is the name of the widget in ESRI?

The following examples are all valid use cases when working with widgets. The name of the class. The declared class name is formatted as esri.folder.className. The unique ID assigned to the widget when the widget is created.

How to auto refresh a feature layer periodically using?

The refreshInterval property enables a timer for the set interval and the client requests new features based on the used to add the feature layer. ArcGIS API for JavaScript: new esri.layers.FeatureLayer (url, options?) Software: ArcGIS API for JavaScript 30.326, 3.28, 3.27

How to set refresh interval on graphics layer?

Hence, the refresh interval can be set on a graphics layer and a dynamic map service layer the same way. There are two ways of setting the feature layer’s refresh interval: The first option is to set the refresh interval property on a feature layer by calling the setRefreshInterval (interval) method using the following script:

How to map large datasets in ArcGIS Pro?

By using a series of spatial joins in ArcGIS Pro, he was able to create a new layer with one point per x/y location. Now our data looked like the following: The number of points was reduced to 677,109 features! Now the layer contained one row per x/y location with fields for each attribute at each depth level.

How are layers used in the ArcGIS API?

Layers are collections of data that can be used in a Map. Layer data can be created on the client, hosted by ArcGIS Online and ArcGIS Enterprise, or hosted by external servers. Layers are often used to manage and display large collections of features.

What to do when there are no bookmarks in Webmap?

See WebMap.save () or WebMap.saveAs () if you want to save the edits to your webmap. This function provides the ability to override either the IMapView goTo () or SceneView goTo () methods. Indicates the heading level to use for the message “No bookmarks” when no bookmarks are available in this widget.

How are bookmarks updated in JavaScript 4.17?

Since 4.17: The thumbnail can be “refreshed” (updated to a screenshot of the view’s current extent), added from a URL (HTTPS protocol required), or removed. When the “Save” button is clicked, the bookmark’s viewpoint is updated to match the current scale, rotation, and extent of the view.

Where can I find a list of bookmarks?

It displays a list of bookmarks , which are typically defined inside the WebMap. This widget is designed to work in 2D. It shouldn’t be used in a SceneView unless you supply the bookmarks manually. For information about gaining full control of widget styles, see the Styling topic.