The Gradient Composite Symbolizer creates gradients between a series of values and symbolizers or from values from Layer.
You can create a Gradient between a List of values and Styles:
Gradient gradient = new Gradient(
new Expression("PERSONS / LAND_KM"),
[0,200],
[new Fill("#000066") + new Stroke("black",0.1), new Fill("red") + new Stroke("black",0.1)],
10,
"exponential"
)
Or you can create a Gradient based on a classification method and a list of colors or a color brewer palette:
Gradient gradient = new Gradient(shapefile, "WORKERS", "Quantile", 5, "Greens")
| Fields inherited from class | Fields |
|---|---|
class Symbolizer |
filterFactory, styleBuilder, styleFactory, styleOptions |
| Constructor and description |
|---|
Gradient
(java.lang.Object expression, java.util.List values, java.util.List styles, int classes = 5, java.lang.String method = "linear", boolean inclusive = true)Create a new Gradient by interpolating between a List of values and styles. |
Gradient
(Layer layer, java.lang.Object field, java.lang.String method, int number, java.lang.Object colors, java.lang.String elseMode = "ignore")Create a new Gradient where the interpolation is based on a classification method based on values from the Layer's Field. |
| Type Params | Return Type | Name and description |
|---|---|---|
|
static java.util.List |
createGraduatedSymbolizer(Layer layer, java.lang.String field, java.lang.String method, int number, java.lang.Object colors, java.lang.String elseMode = "ignore")Create a graduated Symbolizer |
| Methods inherited from class | Name |
|---|---|
class Composite |
range, toString, where, zindex |
class Symbolizer |
and, apply, asSLD, asSLD, buildString, composite, createGeoToolsSymbolizer, getDefault, getDefault, getGeoToolsSymbolizers, getGtStyle, getSld, plus, prepare, prepare, range, range, sortBy, sortBy, where, zindex |
class java.lang.Object |
java.lang.Object#wait(long, int), java.lang.Object#wait(long), java.lang.Object#wait(), java.lang.Object#equals(java.lang.Object), java.lang.Object#toString(), java.lang.Object#hashCode(), java.lang.Object#getClass(), java.lang.Object#notify(), java.lang.Object#notifyAll() |
Create a new Gradient by interpolating between a List of values and styles.
expression - An Expression or a String expression.values - A List of valuesstyles - A List of Stylesclasses - The number of classesmethod - The interpolation method (linear, exponential, logarithmic)inclusive - Whether to include the last value of notCreate a new Gradient where the interpolation is based on a classification method based on values from the Layer's Field.
layer - The Layerfield - The Field or Field's namemethod - The classification method (Quantile or EqualInterval)number - The number of categoriescolors - A Color Brewer palette name, or a List of ColorselseMode - The else mode (ignore, min, max)Create a graduated Symbolizer
layer - The Layerfield - The Field namemethod - The classification method (Quantile or EqualInterval)number - The number of categoriescolors - A Palette name, or a List of ColorselseMode - The else mode (ignore, min, max)