Cache¶

Allows control of loading the image into memory.

Raster Color Mask¶

The Raster Color Mask makes a single color of a coverage transparent. Often used in satellite images to indicate areas where no information was recorded.

Related tasks

Set raster transparent color

Simple Raster¶

Allows simple control over the rendering of a raster image.

• Opacity: allows the transparency of an image to be set; often useful to allow artificial boundaries to show through the raster.

• Scale: Control the scale at which the raster is shown

• RGB Channel Selection

  Provides control over mapping raster channels to Red, Green and Blue channels for display. The gamma of each band can be controlled allowing you to adjust how much of a contribution each band makes to the final display.

  • Band: Allow the selection of a data band. Most processed images are already defied in terms of Red, Green and Blue. If you are working with raw satellite information you will need to carefully select the correct radar, visual light or infrared band for the analysis being performed.
  • Gamma: Allows fine grain control over the contribution being made.
    • 0-1: Multiplies the contribution; brightening the channel accordingly
    • 1.0: Direct 1 to 1 ratio
    • 1-*: Minimises the contribution; dimming the channel accordingly

Single Band Rasters¶

Used to handle single band rasters (such as digital elevation models) where you can map value ranges to artificial colours for display. A number of predefined color maps are provided.

XML¶

This page is used to allow raw access to the xml used to express style information. The XML format used is the Stlye Layer Descritor specificaiton by the Open Geopspatial Consortium.