Remote sensing involves collecting data about objects without direct contact using platforms like satellites. It relies on three factors: the platform, energy source, and sensor. Data is collected through passive sensing using reflected energy or active sensing using emitted energy. Aerial photography is an important method that provides overlapping images for stereo viewing. Satellite remote sensing uses sensors on satellites to gather data. Various satellites like LANDSAT and SPOT are used for applications including weather monitoring, agriculture, geology and urban planning. Geographic information systems (GIS) allow analyzing and visualizing spatial data through layers and maps. GIS is used for tasks such as network analysis, overlay analysis and thematic studies. Global satellite navigation systems like GPS provide positioning data worldwide for applications in transportation