i am working with Snap to create Temperature Images from Landsat Images. For this, i use NDVI Values to estimate LSE. Because the NDVI isn’t really accurate to distinguish between Water and City sometimes, i’ve made a water mask. I want to use this water mask for all of my images, so therefore they all have to have the same extend i’ve learned. I have 38 images from Landsat 5 and 8, wich i all individually subsetted, so they do not have exactly the same extend. I’ve now learned about the graph builder and that i could have subsetted all images with this tool to the same extend. So i tried this, but i cannot choose a source band.
So i collocated only the Landsat 5 images, wich worked, but is not exactly what i want. I do not want all Products in one, but all Products in one extend, so i can use the water mask for all of them. What would be the best way to do this? And do i also need to resample the products first, to go on and use the mask in the band maths calculator?
Your help is really appreciated, thanks in advance!