Satellite Imagery: Satellite imagery involves capturing pictures or images of the Earth's surface from satellites orbiting in space. These images provide valuable visual data that can be used for mapping, monitoring changes over time, and analyzing patterns on the Earth's surface.
GPS (Global Positioning System): GPS is a navigation system that uses signals from satellites to determine precise locations on the Earth's surface. It allows users to collect accurate geographic data by providing real-time information about their exact position.
Surveying: Surveying is the technique of measuring and mapping specific areas or features on the Earth's surface. It involves using specialized instruments like total stations or laser scanners to gather precise measurements that can be used for various purposes like land surveying or infrastructure planning.