Add map layer

Modified on Fri, 02 Feb 2024 at 12:28 PM

The Add map layer block allows you to output data from the workflow visually on the map. Workflows that contain a single image will produce a static map layer, and workflows with multiple images will produce a time series.


Select single band

Display a single band on the map.



Select multiple bands

You can choose to display three numeric bands on the map using each of the Red, Green and Blue (RGB) channels. 



To create a true colour composite image for a photographic dataset such as Sentinel 2-Multispectral, select the Red, Green and Blue bands for the corresponding channels. 


Visualisation options

Click on the cog icon to adjust the visualisation options and add a description.


Colour ramp

Click on the cog icon to change the colour ramp from the default. 


The Invert switch reverses the direction of the palette so that the colours for the maximum and minimum are reversed. 


Colour ramps and contrast options don’t apply when selecting multiple bands or a thematic band. Thematic bands use the preset colour for each class.


Contrast options

The Contrast Options are for defining the minimum and maximum value to scale your images.

  • Default Dataset Visualisation:  The minimum and maximum scaling is pre-defined by the dataset provider.
  • Dataset Min and Max: The minimum and maximum scaling is set to the lowest and highest values within the dataset.
  • Mean +/- 1 Standard Deviation: The minimum and maximum are defined by the mean of the data plus and minus the standard deviation of the data. If the data are normally distributed this includes approximately 68% of all data.
  • Mean +/- 2 Standard Deviations: The minimum and maximum are defined by the mean of the data plus and minus two standard deviations of the data. If the data are normally distributed, this includes approximately 95% of all data.
  • p90: Excludes values below the 5th percentile and above the 95th percentile. This ensures that infrequent but very high or low values don't bias the scaling. 
  • p98: Excludes values below the 1st percentile and above the 99th percentile. This ensures that very infrequent but extremely high or low values don't bias the scaling. 
  • Custom: Specify your own minimum and maximum value. When showing multiple bands, you can apply different scaling for each of the Red, Green and Blue channels.


Learn more: How Earth Blox determines contrast settings


Description

Add a description to your map layer that will display under the map layer name in the map panel.


How do I change the opacity of map layers?

When your workflow has run, and the map layer is shown on the map, click the extras menu next to the map layer legend, and select the ‘Opacity’ option.


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