CSV Layer (CSV)
The CSV layer type references a CSV or TXT file from a publically-accessible web server. It then dynamically loads into the map at run time. The CSV layer will maintain a reference to the CSV resource.
Referenced by: operationalLayers
Properties
| Property | Details |
|---|---|
| columnDelimiter | A string defining the character used to separate columns in a CSV file. If property is present, must be one of the following values:
|
| id | A unique identifying string for the layer. |
| layerDefinition | An object that defines the attribute schema and drawing information for a layer drawn using client-side graphics. See layerDefinition properties table. |
| layerType | String indicating the layer type. Value of this property must be CSV |
| locationInfo | A locationInfo object defining how location information will be retrieved from a CSV file. |
| 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. |
| showLegend | Indicates whether to allow map authors the ability to control what layers should be shown in a client's legend. |
| title | A user-friendly string title for the layer that can be used in a table of contents. |
| type | Deprecated, use layerType instead. |
| url | The URL to the layer. |
| visibility | Boolean property determining whether the layer is initially visible in the web map. |
layerDefinition properties
| Property | Details |
|---|---|
| capabilities | A comma separated list of supported capabilities, e.g. Query,Editing. |
| definitionExpression | SQL-based definition expression string that narrows the data to be displayed in the layer. |
| drawingInfo | Contains the drawing and labeling information. |
| extent | An object defining the rectangular area. Must be one of the following values:
|
| fields | An array of field objects containing information about the attribute fields for the feature collection or layer. |
| geometryType | A string defining the type of geometry. Possible geometry types are: esriGeometryPoint, esriGeometryMultipoint, esriGeometryPolyline, esriGeometryPolygon, and esriGeometryEnvelope. |
| maxScale | Integer property used to determine the maximum scale at which the layer is displayed. |
| minScale | Integer property used to determine the minimum scale at which the layer is displayed. |
| name | Contains a unique name for the layer that can be displayed in a legend. |
| objectIdField | Indicates the name of the object ID field in the dataset. |
| templates | A property of the layer definition when there are no types defined; otherwise, templates are defined as properties of the types. |
| type | Indicates whether the layerDefinition applies to a Feature Layer or a Table. If property is present, must be one of the following values:
|
Example
Live sample web map showing the CSV as operationalLayer
{
"operationalLayers": [
{
"id": "csv_7927",
"type": "CSV",
"layerType": "CSV",
"title": "Earthquakes",
"visibility": true,
"opacity": 1,
"url": "http://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/2.5_month.csv",
"layerDefinition": {
"geometryType": "esriGeometryPoint",
"objectIdField": "__OBJECTID",
"type": "Feature Layer",
"typeIdField": "",
"fields": [],
"types": [],
"capabilities": "Query",
"name": "csv",
"extent": {
"xmin": -20034970.25849882,
"ymin": -9494815.985282788,
"xmax": 20026086.963133518,
"ymax": 14269743.874052156,
"spatialReference": {
"wkid": 102100
}
}
},
"popupInfo": {},
"locationInfo": {
"locationType": "coordinates",
"latitudeFieldName": "latitude",
"longitudeFieldName": "longitude"
},
"columnDelimiter": ","
}
]
}
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