Raster analysis tasks use feature and raster data as input. The tasks that use features as input include:
- Calculate Density
- Convert Feature to Raster
- Create Viewshed
- Interpolate Points
- Summarize Raster Within
For more information on tools that takes raster data as input see raster input.
Features can be input in one of several ways:
- Specify a URL to a feature service layer (or a map service layer that has
queryas one of its capabilities) along with an optional filter. - Specify a feature collection.
URL to a feature service
You can give the URL to a feature service layer or a map service layer that has query capability.
The URL syntax is:
{
"url": "<url to feature or map service layer>"
"filter": "<attribute query string to select features to process>"
}If your layer is on a secure server, you will need to provide a token that allows the analysis service to access your layer.
In addition to supplying the URL, you can supply a filter string for an SQL WHERE clause but without the WHERE statement. For example:
{
"url": "https://services.arcgis.com/f126c8da131543019b05e4bfab6fc6ac/arcgis/rest/services/hospitals/FeatureServer/0",
"filter": "STATE='CA'"
}If no filter is supplied, all features will be analyzed.
Feature collection
The other option is to send a feature instead of a layer. Filters are supported with feature collections. For more information on feature collections and feature sets, see the Javascript documentation for featureCollection and featureSet .
Following is an example of feature collection of points with an Id and Name attribute.
{
"layerDefinition": {
"geometryType": "esriGeometryPoint",
"fields": [
{
"name": "Id",
"type": "esriFieldTypeOID",
"alias": "Id"
},
{
"name": "Name",
"type": "esriFieldTypeString",
"alias": "Name"
}
]
},
"featureSet": {
"geometryType": "esriGeometryPoint",
"spatialReference": {
"wkid": 4326
},
"features": [
{
"geometry": {
"x": -104.44,
"y": 34.83
},
"attributes": {
"Id": 43,
"Name": "Feature 1"
}
},
{
"geometry": {
"x": -100.65,
"y": 33.69
},
"attributes": {
"Id": 67,
"Name": "Feature 2"
}
}
]
},
"filter": "Name = 'Feature 1'"
}