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esri
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: TraceDownstream
[ AMD Module Require | Legacy Module Require ]
dojo.require("esri.dijit.analysis.TraceDownstream");
Description
(Added at v3.12)
Determine the flow paths in a downstream direction from the locations you specify.Samples
Search for samples that use this class.Class hierarchy
esri/dijit/analysis.AnalysisBase |_esri/dijit/analysis.TraceDownstream
Constructors
| Name | Summary |
|---|---|
| new esri.dijit.analysis.TraceDownstream(params, srcNodeRef) | Creates a new TraceDownstream dijit using the given DOM node. |
CSS
esri/dijit/analysis/TraceDownstream | Download source
Properties
| Name | Type | Summary |
|---|---|---|
| analysisGpServer | String | The URL to the analysis service, for example "http://analysis.arcgis.com/arcgis/rest/services/tasks/GPServer". |
| boundingPolygonLayer | FeatureLayer | A layer specifying the area where you want the trace to be clipped. |
| boundingPolygonLayers | FeatureLayer[] | An array of feature layer candidates to be selected as the bounding polygon layer. |
| folderId | String | Sets the selected folder of the select folder dropdown, based on the provided folderId, when showSelectFolder is true. |
| folderName | String | Sets the selected folder of the select folder dropdown, based on the provided folderName, when showSelectFolder is true. |
| maxDistance | Number | Total length of the line that will be returned. |
| maxDistanceUnits | String | The linear units to use for the 'maxDistance' value. |
| outputLayerName | String | The name of the output layer to be shown in the Result layer name input box. |
| portalSelf | Object | The self response of the Portal. |
| portalUrl | String | The URL to the ArcGIS.com site or in-house portal where the GP server is hosted, for example "http://www.arcgis.com". |
| returnFeatureCollection | Boolean | When true, returns the result of analysis as a client-side feature collection. |
| showChooseExtent | Boolean | When true, the choose extent checkbox will be shown. |
| showCloseIcon | Boolean | Indicates whether to show the close icon on the widget's user interface. |
| showCredits | Boolean | When true, the show credit option is visible. |
| showHelp | Boolean | When true, the help links will be shown. |
| showReadyToUseLayers | Boolean | When true, adds an option to the UI that allows users to choose ready to use analysis layers from the Living Atlas Analysis Layers. |
| showSelectAnalysisLayer | Boolean | Indicates whether to display a drop down menu listing valid input analysis layers. |
| showSelectFolder | Boolean | When true, the select folder dropdown will be shown. |
| splitDistance | Number | The trace line will be split into multiple lines where each line is of the specified length. |
| splitUnits | String | The units that splitDistance is specified in. |
| title | String | Overrides the default widget title with a custom title. |
Methods
| Name | Return type | Summary |
|---|---|---|
| cancel(jobInfo) | None | Cancels an analysis job that is being processed. |
| checkJobStatus(jobId) | None | Starts checking the analysis job status for the given jobId. |
| execute(params) | None | Starts an analysis tool. |
| getCreditsEstimate(toolName, jobParams) | Deferred | Gets credits estimate for a specific analysis job. |
| startup() | None | Finalizes the creation of the widget. |
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 |
|---|---|---|
| close | Fires when close icon is clicked or when run analysis button is clicked. | |
| drawtool-activate | Fires when the drawn boundaries option is activated. | |
| drawtool-deactivate | Fires when the drawn boundaries option is deactivated. | |
| job-cancel | {
response: < | Fires when the job in cancelled. |
| job-fail | {
error: < | Fires when the job fails. |
| job-result | {
result: < | Fires after the job fetches result data. |
| job-status | {
jobInfo: < | Fires when the job execution status is received. |
| job-submit | {
params: < | Fires when the job is submitted to the server for asynchronous processing. |
| job-success | {
jobInfo: < | Fires when the job succeeds. |
| start | {
params: < | Fires when the execute method is called. |
Constructor Details
Creates a new TraceDownstream dijit using the given DOM node.
Property Details
<String
StringThe URL to the analysis service, for example "http://analysis.arcgis.com/arcgis/rest/services/tasks/GPServer".
<FeatureLayer
FeatureLayerA layer specifying the area where you want the trace to be clipped.
<FeatureLayer[]
FeatureLayer[]An array of feature layer candidates to be selected as the bounding polygon layer.
<String
StringSets the selected folder of the select folder dropdown, based on the provided
folderId, when showSelectFolder is true. When folderId and folderName are both provided, folderId has higher precedence. (Added at v3.13)<String
StringSets the selected folder of the select folder dropdown, based on the provided
folderName, when showSelectFolder is true. (Added at v3.13)<Number
NumberTotal length of the line that will be returned. If you provide area features to clip the trace, the result will be clipped to the area feature, regardless of the distance you enter here.
<String
StringThe linear units to use for the 'maxDistance' value.
Known values:
Meters | Kilometers | Feet | Yards | MilesDefault value:
Kilometers<String
StringThe name of the output layer to be shown in the Result layer name input box.
<Object
ObjectThe self response of the Portal. When set, optimizes performance to reuse self calls made by the widget. For more documentation on the properties of this object, see the Portal Self ArcGIS REST API documentation. (Added at v3.14)
<String
StringThe URL to the ArcGIS.com site or in-house portal where the GP server is hosted, for example "http://www.arcgis.com". (Added at v3.7)
<Boolean
BooleanWhen true, returns the result of analysis as a client-side feature collection. This value determines whether or not the result will be saved and published on a user's arcgis.com account.
Known values:
true | falseDefault value:
false<Boolean
BooleanWhen true, the choose extent checkbox will be shown.
Known values:
true | falseDefault value:
true<Boolean
BooleanIndicates whether to show the close icon on the widget's user interface. (Added at v3.14)
Known values:
true | falseDefault value:
true<Boolean
BooleanWhen true, the show credit option is visible.
Known values:
true | falseDefault value:
true<Boolean
BooleanWhen true, the help links will be shown.
Known values:
true | falseDefault value:
true<Boolean
BooleanWhen
true, adds an option to the UI that allows users to choose ready to use analysis layers from the Living Atlas Analysis Layers. (Added at v3.14)Known values:
true | falseDefault value:
true<Boolean
BooleanIndicates whether to display a drop down menu listing valid input analysis layers. (Added at v3.14)
Known values:
true | falseDefault value:
true<Boolean
BooleanWhen true, the select folder dropdown will be shown. This parameter should be used when you want to allow users to select a folder in their arcgis.com account where the output feature layer will be exported as a service.
Known values:
true | falseDefault value:
false<Number
NumberThe trace line will be split into multiple lines where each line is of the specified length. For example, if your input point represents a contamination spill and the river it flows into moves at a rate of 0.6 miles per hour, or 15 miles per day, you might want to split the river into 15 mile segments. Splitting the trace into 15 mile intervals will show approximately where the spill will travel each day. The line will be symbolized using graduated colors based on distance and will be labeled with the distance from the start of the trace. The resulting trace will have multiple line segments, each with fields FromDistance and ToDistance.
<String
StringThe units that
splitDistance is specified in.Known values:
Meters | Kilometers | Feet | Yards | MilesDefault value:
Kilometers<String
StringOverrides the default widget title with a custom title. Set this value in the initial constructor parameters.
For example, instead of using the default title (for example "Find Hot Spots"), you can use this property to change the default to a customized title for the tool (for example "Areas with High Crime"). (Added at v3.14)
For example, instead of using the default title (for example "Find Hot Spots"), you can use this property to change the default to a customized title for the tool (for example "Areas with High Crime"). (Added at v3.14)
Method Details
Cancels an analysis job that is being processed.
Parameters:
< |
Required | An object containing job information including job ID, status, message, etc returned by the job-status event. |
Starts checking the analysis job status for the given jobId. (Added at v3.12)
Parameters:
< |
Required | Job id of the analysis job to check. |
Starts an analysis tool.
Parameters:
< |
Required | See the object specifications table below for the structure of the params object. |
Object Specifications:
<
params>< |
Optional | Parameters for creating the output service item. Refer to the ArcGIS REST API - Add Item help topic for a list of available parameters. Only used when the analysis task creates a hosted service. |
< |
Required | The input job parameters. Required parameters vary from class to class. Refer to the Analysis REST API Documentation for details (Under the Request Parameters section of each task). When creating a hosted service, a layer name is required. |
Sample:
var params = {
itemParams: {
description: "Item description.",
snippet: "A short summary about this item.",
tags: "<tag1>, <tag2>, <tag3>, ... ",
typeKeywords: "<typeKeyword1>, <typeKeyword2>, <typeKeyword3>, ... "
},
jobParams: {
outputLayerName: "{\"serviceProperties\":{\"name\":\"Name of the output feature service\"},\"itemProperties\":{\"itemId\":\"<itemId>\"}}",
...
}
}
analysisBase.execute(params);
Gets credits estimate for a specific analysis job. This method returns a deferred object. The callback function has an object containing the number of records to be processed and the estimated credit cost for this job.
Return type:
DeferredParameters:
< |
Required | The name of the analysis tool from which a credits estimate will be returned. |
< |
Required | The input job parameters. This value should be the same as the jobParams property of an analysis tool dijit. Refer to the jobParams property of this class for detailed syntax. |
Sample:
analysisBase.getCreditsEstimate("FindHotSpots",{
AnalysisLayer: layer._json,
context: '{"outSR":{"wkid":102100}}',
isProcessInfo: true,
returnFeatureCollection: true
}).then(function(result){
console.log(result);
});
//the "result" argument above:
//{
// "cost": 1.472,
// "totalRecords": 1472,
//}Event Details
[ On Style Events | Connect Style Event ]
Fires when the drawn boundaries option is activated. Only valid when using the FindHotSpots or ExtractData widget. A typical usage is to disable the zoom/pan/popup handlers when drawing is activated. (Added at v3.7)
Fires when the drawn boundaries option is deactivated. Only valid when using the FindHotSpots or ExtractData widget. A typical usage is to enable the zoom/pan/popup handlers when drawing is deactivated. (Added at v3.7)
Fires when the job in cancelled. (Added at v3.7)
Event Object Properties:
< |
An GP job object returned by the GP server. Refer to the GP Job and the Checking job status topics in the ArcGIS REST API Documentation for more information and syntax.
{
"inputs": {},
"jobId": <job id>,
"jobStatus": <job status>,
"messages": <an array of message text>,
"results": {}
} |
Fires when the job fails. (Added at v3.7)
Event Object Properties:
< |
The error message returned by a failed job.{
"analysisReport": <analysis report message>,
"dataType": <analysis report message>,
"paramName": < parameter name >,
"value": <output item info | feature collection>
} |
Fires after the job fetches result data. The returned argument contains the output value (either a feature collection or a url to the hosted service), which you may add to the map as a feature layer. (Added at v3.7)
Event Object Properties:
< |
An object containing the resulted message and value. Based on the GP result object returned by the GP server with the analysisReport property added.
If output is a feature collection, value is a feature collection object; if output is a hosted arcgis.com feature service, value is an object with item information including ID and URL. Refer to the ArcGIS REST API documentation - Feature Output for more information.{
"analysisReport": <analysis report message>,
"dataType": <analysis report message>,
"paramName": < parameter name >,
"value": <output item info | feature collection>
} |
Sample:
analysisTool.on("job-result", function(result){
var featureLayer = new FeatureLayer(result.value['url'] || result.value);
map.addLayer(featureLayer);
})
Fires when the job execution status is received. (Added at v3.7)
Event Object Properties:
< |
An object containing job information including job ID, status, message, etc. Based on the GP job object returned by the GP server with the jobParam property attached. Refer to the GP Job and the Checking job status topics in the ArcGIS REST API Documentation for more information and syntax.{
"inputs": {},
"jobParams": <job parameters>,
"jobId": <job id>,
"jobStatus": <job status>,
"messages": <an array of message text>,
"results": {}
} |
Fires when the job is submitted to the server for asynchronous processing. (Added at v3.7)
Event Object Properties:
< |
The input job parameters. |
Fires when the job succeeds. (Added at v3.7)
Event Object Properties:
< |
An object containing job information including job ID, status, message, etc. Based on the GP job object returned by the GP server with the jobParam property attached. Refer to the GP Job and the Checking job status topics in the ArcGIS REST API Documentation for more information and syntax.
This returned object can be passed into the cancel(jobInfo) method to terminate a job. {
"inputs": {},
"jobParams": <job parameters>,
"jobId": <job id>,
"jobStatus": <job status>,
"messages": <an array of message text>,
"results": {}
} |
Fires when the execute method is called. (Added at v3.7)
Event Object Properties:
< |
The input job parameters. |