Credit: Photo by Erik Jepsen/UC San Diego Publications.
From left, Big Pixel Initiative research assistants Karla Yee-Amezaga and Stephanie Vallarino study high-resolution satellite images with Ran Goldblatt.
Different band combinations are used to visualize and map the boundaries of urban areas in Ahmedabad, India in (left) 2000 and (right) 2015. Here, the built-up area detection was done using satellite imagery from Landsat (top).