The GeoJSON layer type references a GeoJSON file from a publicly-accessible web server. It then dynamically loads into the map at run time. The GeoJSON layer will maintain a reference to the GeoJSON resource.
Referenced by: operationalLayers
Properties
| Property | Details |
|---|---|
| blendMode | Blend modes are used to create various effects by blending colors of top and background layers. normal blend mode is the default.Valid values: average, color, color-burn, color-dodge, darken, destination-atop, destination-in, destination-out, destination-over, difference, exclusion, hard-light, hue, invert, lighten, lighter, luminosity, minus, multiply, normal, overlay, plus, reflect, saturation, screen, soft-light, source-atop, source-in, source-out, vivid-light, xor |
| customParameters | A sequence of custom parameters appended to the URL of all requests related to a layer. |
| disablePopup | Indicates whether to allow a client to ignore popups defined by the service item. |
| effect | Effect provides various filter functions to achieve different visual effects similar to how image filters (photo apps) work. |
| featureEffect | Feature Effect emphasizes or deemphasizes features that satisfy a filter using graphical effects |
| id | A unique identifying string for the layer. |
| itemId | Optional string containing the item ID if it's registered on ArcGIS Online or your organization's portal. |
| layerDefinition | Additional properties that define drawing information and other configurations for the layer. See layerDefinition properties table. |
| layerType | String indicating the layer type. Valid value of this property GeoJSON |
| maxScale | A number representing the maximum scale at which the layer will be visible. The number is the scale's denominator. |
| minScale | A number representing the minimum scale at which the layer will be visible. The number is the scale's denominator. |
| opacity | The degree of transparency applied to the layer on the client side, where 0 is full transparency and 1 is no transparency. |
| popupInfo | A popupInfo object defining the content of popup windows when you click or query a feature. |
| refreshInterval | Refresh interval of the layer in minutes. Non-zero value indicates automatic layer refresh at the specified interval. Value of 0 indicates auto refresh is not enabled. |
| showLabels | Labels will display if this property is set to true and the layer also has a labelingInfo property associated with it. This property can get stored in the web scene config. |
| showLegend | Boolean value indicating whether to display the layer in the legend. Default value is true. |
| timeAnimation | Indicates whether to disable time animation if the layer supports it. |
| title | A user-friendly string title for the layer that can be used in a table of contents. |
| url | The URL to the layer. |
| visibility | Boolean property determining whether the layer is initially visible in the web map. |
| visibilityTimeExtent | Represents time extent that will control when a layer should be visible based on webmap's current time. Visibility time extent only affects the layer visibility and will not filter the data. |
layerDefinition properties
| Property | Details |
|---|---|
| definitionExpression | SQL-based definition expression string that narrows the data to be displayed in the layer. |
| drawingInfo.labelingInfo[] | An object defining the properties used for labeling the layer. If working with Map Image layers, this property is only applicable if the layer is enabled with dynamic layers |
| drawingInfo.renderer | An object defined which provides the symbology for the layer. If working with Map Image layers, this property is only applicable if the layer is enabled with dynamic layers |
| featureReduction | An object defining how to aggregate dense point data to clusters or bins. |
| fields[] | An array of field objects containing information about the attribute fields for the feature collection or layer. |
| objectIdField | Indicates the name of the object ID field in the dataset. |
| orderBy[] | An array of orderByField objects specifying the feature display order. Features can be sorted in ascending or descending order of a numeric or date field only. If ascending, features with smaller values will be drawn on top of features with larger values. For date values, ascending order means features with older dates will be drawn on top of features with recent dates. If descending, the sort behavior is reversed. When this property is not defined, features are displayed in the order in which they are received by the client. |
geojson Layer Example
{
"id": "geojson_1234",
"layerType": "GeoJSON",
"title": "Earthquakes",
"visibility": true,
"opacity": 1,
"url": "https://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/significant_week.geojson",
"blendMode": "overlay",
"popupInfo": {}
}