The ParquetLayer enables visualization of Parquet files on a map. Parquet is a columnar storage format optimized for efficiently handling big data and distributed environments. Its columnar structure, compression capabilities, and schema support make it ideal for analytics and query-heavy workloads.
Referenced by: operationalLayers
Properties
| Property | Details |
|---|---|
| blendMode | Blend modes are used to create various effects by blending colors of top and background layers. normal blend mode is the default.Valid values: average, color, color-burn, color-dodge, darken, destination-atop, destination-in, destination-out, destination-over, difference, exclusion, hard-light, hue, invert, lighten, lighter, luminosity, minus, multiply, normal, overlay, plus, reflect, saturation, screen, soft-light, source-atop, source-in, source-out, vivid-light, xor |
| customParameters | A sequence of custom parameters appended to the URL of all requests related to a layer. |
| disablePopup | Indicates whether to allow a client to ignore popups defined by the service item. |
| effect | Effect provides various filter functions to achieve different visual effects similar to how image filters (photo apps) work. |
| featureEffect | Feature Effect emphasizes or deemphasizes features that satisfy a filter using graphical effects. Must be one of the following values:
|
| id | A unique identifying string for the layer. |
| layerDefinition | A layerDefinition object defining the attribute schema and drawing information for the layer. See layerDefinition properties table. |
| layerType | String indicating the layer type. Valid value of this property ParquetLayer |
| maxScale | A number representing the maximum scale at which the layer will be visible. The number is the scale’s denominator. |
| minScale | A number representing the minimum scale at which the layer will be visible. The number is the scale’s denominator. |
| 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 window when you click a feature on the map. |
| showLabels | Labels will display if this property is set to true and the layer also has a labelingInfo property associated with it. This property can get stored in the web map config and in the item/data. |
| showLegend | Boolean value indicating whether to display the layer in the legend. Default value is true. |
| source | An object indicating location of parquet dataset used in this layer. |
| timeAnimation | Indicates whether to disable time animation if the layer supports it. |
| title | A user-friendly string title for the layer that can be used in a table of contents. |
| visibility | Boolean property determining whether the layer is initially visible in the web map. |
| visibilityTimeExtent | Represents time extent that will control when a layer should be visible based on webmap’s current time. Visibility time extent only affects the layer visibility and will not filter the data. |
layerDefinition properties
| Property | Details |
|---|---|
| definitionExpression | SQL-based definition expression string that narrows the data to be displayed in the layer. |
| disableDisplayFilter | When true, ignores the display filter defined on the layer by the displayFilterInfo property. |
| displayFilterInfo | Display filters provide information about which features should be rendered on the display. |
| drawingInfo.labelingInfo[] | An object defining the properties used for labeling the layer. If working with Map Image layers, this property is only applicable if the layer is enabled with dynamic layers |
| drawingInfo.renderer | An object defined which provides the symbology for the layer. If working with Map Image layers, this property is only applicable if the layer is enabled with dynamic layers |
| featureReduction | An object defining how to aggregate dense data to clusters or bins. This is a visualization-only feature intended solely for reducing the visual complexity of many overlapping features to a few aggregate features that communicate patterns of density. This is not intended to be used for analytical purposes. |
| fields[] | An array of field objects containing information about the attribute fields for the feature collection or layer. |
| geometryEncoding | The encoding format used to store geometries in the Parquet files. Applicable to ParquetLayer only. |
| geometryType | A string defining the type of geometry. Possible geometry types are: esriGeometryPoint, esriGeometryMultipoint, esriGeometryPolyline, esriGeometryPolygon, and esriGeometryEnvelope. |
| orderBy[] | An array of orderByField objects specifying the feature display order. Features can be sorted in ascending or descending order of a numeric or date field only. If ascending, features with smaller values will be drawn on top of features with larger values. For date values, ascending order means features with older dates will be drawn on top of features with recent dates. If descending, the sort behavior is reversed. When this property is not defined, features are displayed in the order in which they are received by the client. |
| spatialReference | An object containing the WKID or WKT identifying the spatial reference of the layer’s geometry. |