Exercise 3.2: Creating Mosaics and Composites from ImageCollections

The default order of the collection is by date. So when you display the collection, it implicitly creates a mosaic with the latest pixels on top. You can call  .mosaic() on an ImageCollection to create a mosaic image from the pixels at the top.

We can also create a composite image by applying selection criteria to each pixel from all pixels in the stack. Here we use the median() function to create a composite where each pixel value is the median of all pixels from the stack.

Tip: If you need to create a mosaic where the images are in a specific order, you can use the .sort() function to sort your collection by a property first.

Watch this video:

The code for this exercise is available in this repository under Module3/Exercise2