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Web Scene Specification

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 scene 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:
  • \t (tab)
  • (space)
  • , (comma)
  • ; (semicolon)
  • | (pipe)
disablePopup Indicates whether to allow a client to ignore popups defined by the service item.
id A unique identifying string for the layer.
layerDefinition Additional properties that define drawing information and other configurations for the layer.
See layerDefinition properties table.
layerType String indicating the layer type.
Value of this property must be CSV
listMode To show or hide the layer in the layer list
If property is present, must be one of the following values:
  • hide
  • show
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.
screenSizePerspective Apply perspective scaling to screen-size symbols.
showLabels Labels will display if this property is set to true and the layer also has a labelingInfo property associated with it.
showLegend Boolean value indicating whether to display the layer in the legend. Default value is true.
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 scene.

layerDefinition properties

Property Details
definitionExpression SQL-based definition expression string that narrows the data to be displayed in the layer.
drawingInfo Contains the drawing and labeling information.
elevationInfo Elevation info defines how features are aligned to ground or other layers.
featureReduction An object that specifies how features are reduced or aggregated, with the goal of decluttering the view or presenting the user with an aggregate visualization. If unset, every feature is rendered individually.
fields An array of field objects containing information about the attribute fields for the feature collection or layer.
maxScale Represents the maximum scale (most zoomed in) at which the layer is visible in the view. If the web scene 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. If set, the maxScale value should always be smaller than the minScale value, and greater than or equal to the service specification.
minScale Represents the minimum scale (most zoomed out) at which the layer is visible in the view. If the web scene is zoomed out beyond this scale, the layer will not be visible. A value of 0 means the layer does not have a minimum scale. If set, the minScale value should always be larger than the maxScale value, and lesser than or equal to the service specification.

Example

{
  "operationalLayers": [
    {
      "id": "15844915609-layer-0",
      "layerType": "CSV",
      "title": "earthquake",
      "url": "http://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/2.5_week.csv",
      "columnDelimiter": ",",
      "opacity": 1,
      "visibility": true,
      "layerDefinition": {
        "drawingInfo": {
          "renderer": {
            "type": "simple",
            "symbol": {
              "type": "PointSymbol3D",
              "symbolLayers": [
                {
                  "material": {
                    "color": [
                      238,
                      69,
                      0
                    ],
                    "transparency": 50
                  },
                  "type": "Icon",
                  "resource": {
                    "primitive": "circle"
                  },
                  "size": 17.25,
                  "outline": {
                    "color": [
                      255,
                      255,
                      255
                    ],
                    "size": 0.5
                  }
                }
              ]
            }
          }
        }
      }
    }
  ]
}

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