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README.md

Monthly Composite Script

Show script or download{:target="_blank"} it.

{% highlight javascript %} {% include_relative monthly_composite.js %} {% endhighlight %}

Evaluate and visualize

General description of the script

Monthly composite (31 days before the chosen date), computed with best bands ratio. This script is here for those who want a cloud free image representing the last 31 days.

In order to select the best pixel in a month (and avoid cloud), a selection is made using a ratio :

  • When blue < 0.12, date is chosen where max ratio of B08 against B02.
  • If no pixel available above, when blue < 0.45, date is chosen where max ratio of B03 against B02.
  • If water is detected, date is chosen where max ratio of B02 against B08.
  • If snow is detected, median of scene with snow.

Author of the script

Karasiak Nicolas

Description of representative images

Lac léman, composite from 2019-03-29

Lac léman, composite from 2019-03-29

South Madagascar, composite from 2019-04-26

South Madagascar, composite from 2019-04-26

South Madagascar, composite from 2019-04-26

South Madagascar, composite from 2019-04-26

See the supplementary material for more examples.

Credits

Thanks to :

  • Pierre Markuse for his natural color script
  • Harel Dan for his temporal script
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