What is remote sensing and what are some ways mapping data can be gathered remotely?

Remote sensing is the method of acquiring information about an object or phenomenon without coming into direct contact with it. Mapping data can be gathered remotely through techniques like satellite imagery, aerial Photography, LiDAR (Light Detection and Ranging), and drones equipped with cameras or sensors. These methods enable the collection of data from a distance, allowing for the creation of detailed maps and models of the earth's surface.