geotrellis.render

ColorRamp

class ColorRamp extends AnyRef

* List of colors for rendering a raster.

In order to select colors for a raster, one often divides the values in the raster into distinct ranges and selects a color for each range. A ColorRamp provides the colors from which to select.

NB: The list of colors are RGBA values, which are usually represented as 8 character hex string, like "0x0000FFFF" where the last two character encode an alpha (transparency/opacity) value.

Usually on the web, you see "RGB" or "hex" color values, like 0x0000FF (blue). If you have a list of RGB values, use the method ColorRamp.createWithRGBColors.

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Instance Constructors

  1. new ColorRamp(colors: Seq[Int])

    colors

    An array of RGBA integer values

Value Members

  1. final def !=(arg0: AnyRef): Boolean

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  2. final def !=(arg0: Any): Boolean

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  3. final def ##(): Int

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  4. final def ==(arg0: AnyRef): Boolean

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  5. final def ==(arg0: Any): Boolean

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  6. def alphaGradient(start: Int = 0, stop: Int = 0xFF): ColorRamp

  7. final def asInstanceOf[T0]: T0

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  8. def clone(): AnyRef

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  9. val colors: Seq[Int]

    An array of RGBA integer values

  10. final def eq(arg0: AnyRef): Boolean

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  11. def equals(arg0: Any): Boolean

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  12. def finalize(): Unit

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  13. final def getClass(): Class[_]

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  14. def hashCode(): Int

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  15. def interpolate(nBreaks: Int): ColorRamp

    Generate n new colors using the existing color ramp as a guide.

    Generate n new colors using the existing color ramp as a guide.

    The first and last colors of the existing ramp will be preserved in the output ColorRamp. For example, given a color ramp of two colors, red and yellow, a request for 5 colors would return Red, Yellowish-Red, Orange, Reddish-Yellow, Yellow.

  16. final def isInstanceOf[T0]: Boolean

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  17. final def ne(arg0: AnyRef): Boolean

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  18. final def notify(): Unit

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  19. final def notifyAll(): Unit

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  20. def setAlpha(a: Int): ColorRamp

  21. final def synchronized[T0](arg0: ⇒ T0): T0

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  22. def toArray: Array[Int]

  23. def toString(): String

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  24. final def wait(): Unit

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  25. final def wait(arg0: Long, arg1: Int): Unit

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  26. final def wait(arg0: Long): Unit

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