Clouds are a problem for all optical imagery. As you can see from the image above, there are two main problems. The first is that clouds themselves obscure the land surface, but at least they are distinctive and should be easy to find and remove. The second is the cloud shadow. The shadow is more problematic because you can still see the ground surface below, but the solar illumination is different to the non-shadow areas, so we really want to get rid of them too. In this article, we will explore three different methods to get rid of the clouds and produce a continuous cloud-free image.
To mask out clouds in Earth Blox use the INPUT-> FILTER-> Mask Out Clouds, block, shown below:
