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esri/arcgis
esri/dijit
esri/dijit/analysis
esri/dijit/geoenrichment
esri/dijit/geoenrichment/ReportPlayer
esri/geometry
esri/layers
esri/renderers
esri/symbols
esri/tasks
esri/tasks/datareviewer
esri/tasks/geoenrichment
esri/tasks/locationproviders
Class: GeoRSSLayer
[ AMD Module Require | Legacy Module Require ]
dojo.require("esri.layers.GeoRSSLayer");
Description
(Added at v3.2)
The GeoRSSLayer class is used to create a layer based on GeoRSS. GeoRSS is a way to add geographic information to an RSS feed. The GeoRSSLayer supports both "GeoRSS-Simple" and "GeoRSS GML".
GeoRSSLayer supports multiple geometry in RSS
GeoRSSLayer exports custom RSS tags as additional attribute fields - simple strings or json arrays/objects (added v3.8).
Note: The GeoRSSLayer uses a utility service from ArcGIS.com, therefore your GeoRSS file must be publicly accessible on the internet. If your GeoRSS files are behind the firewall you will need to set the
esriConfig.defaults.geoRSSService to your own utility service. (Requires Portal for ArcGIS).
require(["esri/config"], function(esriConfig) {
esriConfig.defaults.geoRSSService = "http://www.example.com/arcgis/sharing/rss";
});
Samples
Search for samples that use this class.Class hierarchy
esri/layers.Layer |_esri/layers.GeoRSSLayer
Constructors
| Name | Summary |
|---|---|
| new esri.layers.GeoRSSLayer(url, options?) | Creates a new GeoRSSLayer object. |
Properties
| Name | Type | Summary |
|---|---|---|
| className | String | class attribute of the layer's node. |
| copyright | String | The copyright information for the layer. |
| defaultVisibility | Boolean | The default visibility of the layer. |
| description | String | The layer description. |
| id | String | ID assigned to the layer. |
| items | Graphic[] | An array that contains all the graphics in the GeoRSSLayer. |
| loadError | Error | Set if the layer failed to load. |
| loaded | Boolean | When the layer is loaded, the value becomes "true", and layer properties can be accessed. |
| maxScale | Number | Maximum visible scale for the layer. |
| minScale | Number | Minimum visible scale for the layer. |
| name | String | The name of the layer. |
| opacity | Number | Opacity or transparency of layer. |
| refreshInterval | Number | Refresh interval of the layer in minutes. |
| showAttribution | Boolean | When true, the layer's attribution is displayed on the map. |
| suspended | Boolean | When true, the layer is suspended. |
| url | String | The publicly accessible URL to a GeoRSS file. |
| visible | Boolean | Visibility of the layer. |
| visibleAtMapScale | Boolean | When true, the layer is visible at the current map scale. |
Methods
| Name | Return type | Summary |
|---|---|---|
| attr(name, value) | Layer | Adds a new attribute or changes the value of an existing attribute on the layer's node. |
| getFeatureLayers() | FeatureLayer[] | An array of feature layers for the GeoRSSLayer. |
| getMap() | Map | Returns reference to the map control the layer is added to. |
| getNode() | HTMLElement | Returns the layer's DOM node. |
| hide() | None | Sets the visibility of the layer to "false". |
| isVisibleAtScale(scale) | Boolean | Returns true if the layer is visible at the given scale. |
| resume() | None | Resumes layer drawing. |
| setMaxScale(scale) | None | Set the maximum scale for the layer. |
| setMinScale(scale) | None | Set the minimum scale for the layer. |
| setOpacity(opacity) | None | Sets the opacity of the layer. |
| setRefreshInterval(interval) | Layer | Changes the layer's refresh interval to the given value (in minutes). |
| setScaleRange(minScale, maxScale) | None | Set the scale range for the layer. |
| setVisibility(isVisible) | None | Sets the visibility of the layer. |
| show() | None | Sets the visibility of the layer to "true". |
| suspend() | None | Suspends layer drawing. |
Events
[ On Style Events | Connect Style Event ]
All On Style event listeners receive a single event object. Additionally, the event object also contains a 'target' property whose value is the object which fired the event.
Events
| Name | Event Object | Summary |
|---|---|---|
| error | {
error: < | Fires when there is a problem retrieving a layer. |
| load | {
layer: < | Fires after layer properties for the layer are successfully populated. |
| opacity-change | {
opacity: < | Fires when the layer opacity has been changed, and returns an object with the opacity value. |
| refresh | Fires when the layer is refreshed. | |
| refresh-interval-change | This event is fired when the layer's refreshInterval is modified. | |
| resume | Fires when a layer resumes drawing. | |
| scale-range-change | Fires when a layer's minScale and/or maxScale is changed. | |
| scale-visibility-change | Fires when a layer's scale visibility changes. | |
| suspend | Fires when a layer suspends drawing. | |
| update | Fires any time a layer has finished loading or updating itself. | |
| update-end | {
error: < | Fires when a layer has finished updating its content. |
| update-start | Fires when a layer begins to update its content. | |
| visibility-change | {
visible: < | Fires when the layer visibility has been changed, and returns an object with a Boolean visible property containing the new visibility value of the layer. |
Constructor Details
Creates a new GeoRSSLayer object.
Parameters:
< |
Required | URL to the GeoRSS resource. |
< |
Optional | Optional parameters. See options list. |
options properties: < |
Optional | The template used to display popup window for identify operation. var template = new InfoTemplate();
template.setTitle("id:${id}");
template.setContent("name:${name}");
var options = { "infoTemplate": template };
var rssLayer = new GeoRSSLayer(rssUrl, options); |
< |
Optional | Opacity or transparency of layer. Values range from 0.0 to 1.0, where 0.0 is 100% transparent and 1.0 has no transparency. |
< |
Optional | The output spatial reference for the GeoRSSLayer. |
< |
Optional | The default symbol use to display point features. |
< |
Optional | The default symbol used to display polygon features. |
< |
Optional | The default symbol used to display polyline features. |
< |
Optional | 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. |
Sample:
var url = "http://earthquake.usgs.gov/earthquakes/catalogs/eqs7day-M5.xml"; var rssLayer = new esri.layers.GeoRSSLayer(url);
Property Details
<String
StringThe copyright information for the layer. This information will be displayed on the map by the
Attribution widget.<String
StringThe layer description.
<String
StringID assigned to the layer. If not assigned, esri.Map assigns value. By default, the ID of the layer is "layer" followed by a number. The ID can be user defined only in the layer constructor.
Sample:
- Setting the layer ID in the layer constructor.
population = new esri.layers.ArcGISDynamicMapServiceLayer("http://myserver/arcgis/rest/population/MapServer/Layers", {id:"population"}); - Setting the layer ID after a layer is initialized.
population.id = "population";
- Retrieving the layer ID.
function getMapLayers() { for (var j=0, jl=myMap.layerIds.length; j<jl; j++) { var currentLayer = myMap.getLayer(myMap.layerIds[j]); alert("id: " + currentLayer.id); } }
<Graphic[]
Graphic[]An array that contains all the graphics in the GeoRSSLayer. The array can contain graphics with a mix of geometry types: point, line, polygon.
Sample:
dojo.forEach(georssLayer.items,function(item){
var attributes = item.attributes;
});
<Error
ErrorSet if the layer failed to load. (Added at v3.9)
<Boolean
BooleanWhen the layer is loaded, the value becomes "true", and layer properties can be accessed. The onLoad event is also fired.
Known values:
true | false<Number
NumberMaximum visible scale for the layer. If the map is zoomed in beyond this scale, the layer will not be visible. A value of 0 means the layer does not have a maximum scale. (Added at v3.1)
Default value:
0<Number
NumberMinimum visible scale for the layer. If the map is zoomed out beyond this scale, the layer will not be visible. A value of 0 means the layer does not have a visible scale. (Added at v3.1)
Default value:
0<String
StringThe name of the layer.
<Number
NumberOpacity or transparency of layer. Values range from 0.0 to 1.0, where 0.0 is 100% transparent and 1.0 has no transparency.
Known values:
0.0 - 1.0Default value:
0<Number
NumberRefresh 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. (Added at v3.7)
Default value:
0<Boolean
BooleanWhen true, the layer's attribution is displayed on the map. (Added at v3.1)
Known values:
true | falseDefault value:
true<Boolean
BooleanWhen true, the layer is suspended. A layer is considered to be suspended when one of the following is true:
- The layer is hidden.
- The layer is not visible at the current map scale.
- The layer is explicitly suspended by calling the
Layer.suspendmethod.
Known values:
true | false<String
StringThe publicly accessible URL to a GeoRSS file.
<Boolean
BooleanWhen true, the layer is visible at the current map scale. (Added at v3.1)
Known values:
true | falseMethod Details
Adds a new attribute or changes the value of an existing attribute on the layer's node. Removes the attribute if the value is
null or undefined. (Added at v3.7)Return type:
LayerAn array of feature layers for the GeoRSSLayer. There is one feature layer for each geometry type.
Return type:
FeatureLayer[]Sample:
var layers = geoRSSLayer.getFeatureLayers();
dojo.forEach(layers,function(layer){
if (layer.type = 'esri.geometry.Point'){
var renderer = new esri.renderer.ClassBreaksRenderer(defaultSymbol, symbologyField);
renderer.addBreak(7,12, symbol1);
renderer.addBreak(6,7,symbol2);
renderer.addBreak(5,6,symbol3);
layer.setRenderer(renderer);
}
});
Returns reference to the map control the layer is added to. Returns
null or undefined if it is not added to a map. (Added at v3.7)Return type:
MapSets the visibility of the layer to "false". The layer is not removed, but it is hidden from view.
Returns true if the layer is visible at the given scale. (Added at v3.1)
Return type:
BooleanParameters:
< |
Required | The scale at which to check if the layer is visible. |
Set the maximum scale for the layer. (Added at v3.1)
Parameters:
< |
Required | The maximum scale at which the layer is visible. |
Set the minimum scale for the layer. (Added at v3.1)
Parameters:
< |
Required | The minimum scale at which the layer is visible. |
Sets the opacity of the layer. Values range from 0.0 to 1.0, where 0.0 is 100% transparent and 1.0 has no transparency.
Parameters:
< |
Required | Value from 0 to 1, where 0 is 100% transparent and 1 has no transparency. The default value is 1. |
Sample:
layer.setOpacity(0.5);
Changes the layer's refresh interval to the given value (in minutes). Non-zero value sets up automatic layer refresh at the specified interval. Value of 0 stops auto refresh. (Added at v3.7)
Return type:
LayerParameters:
< |
Required | 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. |
Set the scale range for the layer. If
minScale and maxScale are set to 0 then the layer will be visible at all scales. (Added at v3.1)Sets the visibility of the layer. When true, the layer is visible.
Parameters:
< |
Required | Set the visibility of the layer. |
Event Details
[ On Style Events | Connect Style Event ]
Fires when there is a problem retrieving a layer. Should be used in favor of onError. (Added at v3.5)
Event Object Properties:
< |
ArcGIS Server error message returned in a JavaScript error object. |
Fires after layer properties for the layer are successfully populated. This event must be successful before the layer can be added to the map. Should be used in favor of onLoad. (Added at v3.5)
Event Object Properties:
< |
The loaded layer. |
Fires when the layer opacity has been changed, and returns an object with the opacity value. Should be used in favor of onOpacityChange. (Added at v3.5)
Event Object Properties:
< |
Fires when the layer opacity (transparency) changes. A number property named opacity that indicates the new opacity. Values range from 0.0 to 1.0, where 0.0 is 100% transparent and 1.0 has no transparency. |
This event is fired when the layer's
refreshInterval is modified. (Added at v3.7)Fires when a layer's minScale and/or maxScale is changed. Should be used in favor of onScaleRangeChange. (Added at v3.5)
Fires when a layer's scale visibility changes. The scale visibility changes when a layer is initially visible and becomes invisible because the map scale does not intersect the layer's scale range or vice versa. Should be used in favor of onScaleVisibilityChange. (Added at v3.5)
Fires any time a layer has finished loading or updating itself.
For an ArcGISTiledMapServiceLayer,
the event fires when all required tiles have been retrieved and displayed. For an
ArcGISDynamicMapServiceLayer or
ArcGISImageServiceLayer, the event fires
when the map image has been retrieved and displayed. For a GraphicsLayer,
the event fires when all graphics have been redrawn after a pan or zoom.
Deprecated at v2.0. Use update-start and update-end instead. (Added at v3.6)
Fires when a layer has finished updating its content. It is the responsibility of the subclass to determine when this event is fired. Should be used in favor of onUpdateEnd. (Added at v3.5)
Event Object Properties:
< |
Optional argument. The error object is available when an error occurs during the update. |
Fires when a layer begins to update its content. It is the responsibility of the subclass to determine when this event is fired. Should be used in favor of onUpdateStart. (Added at v3.5)
Fires when the layer visibility has been changed, and returns an object with a Boolean visible property containing the new visibility value of the layer. Should be used in favor of onVisibilityChange. (Added at v3.5)
Event Object Properties:
< |
Fires when the layer visibility changes. A boolean property named visible indicates whether or not the layer is visible after visibility changed. |