This renderer displays continuous raster cell values across a gradual ramp of colors. Use this renderer to draw a single band of continuous data. This renderer works well when you have a large range of values to display, such as with imagery or scientific data.
Referenced by: Raster Renderers
Properties
| Property | Details |
|---|---|
| colorRamp | A colorRamp object is used to specify a range of colors that are applied to a group of symbols. |
| computeGamma | Indicates if gamma values should be computed by default. |
| dra | Indicates if Dynamic Range Adjustment should be applied. |
| gamma[] | The list of Gamma value(s). |
| max | The current maximum output value. |
| maxPercent | The current maximum percent value. |
| min | The current minimum output value. |
| minPercent | The current minimum percent value. |
| numberOfStandardDeviations | The number of standard deviations for standard deviation stretch. |
| sigmoidStrengthLevel | Set this from (1 to 6) to adjust the curvature of Sigmoid curve used in color stretch. |
| statistics[] | The custom raster stretch statistics. |
| stretchType | The stretch types for stretch raster function. Valid values: histogramEqualization, minMax, none, percentClip, sigmoid, standardDeviation |
| type | Specifies the type of renderer used. Valid value of this property rasterStretch |
| useGamma | Indicates if the renderer applies Gamma stretch. |
Additional information
For each stretchType there are specific sets of requirements that are as follows: none: does not require other parameters.standardDeviation: requires numberOfStandardDeviations, statistics, or dra.histogramEqualization: requires the source dataset to have histograms or additional dra.minMax: requires statistics or dra.percentClip: requires minPercent, maxPercent, and dra.sigmoid: does not require other parameters. Optionally, set the sigmoidStrengthLevel (1 to 6) to adjust the curvature of Sigmoid curve used in color stretch.
Example
{ "type": "rasterStretch", "statistics": [ [ 22.5, 10.5, 15, 1 ] ]}