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Location – Where the object is found on the map or photo. Knowing the place can give clues about what it is.
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Size – How big or small it appears, which helps identify objects (e.g., a football field vs. a garden).
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Shape – The outline or form of the object, such as round, rectangular, or irregular.
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Shadow – The dark area an object casts; it helps guess height, shape, and type of object.
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Tone/Color – Lightness, darkness, or color differences that help tell objects apart (e.g., blue water, green vegetation).
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Texture – How smooth or rough the surface looks in the image (e.g., forest appears rough, grassland appears smooth).
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Pattern – The arrangement or repetition of objects, like rows of trees or grid-like city blocks.
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Height/Depth – How tall or deep an object or landform is, often estimated from shadows or stereo images.
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Site/Situation/Association – The surroundings and relationships between objects (e.g., a swimming pool next to a house, or a factory near a railway line).
Orbital characteristics of Remote sensing satellite geostationary and sun-synchronous Orbits in Remote Sensing Orbit = the path a satellite follows around the Earth. The orbit determines what part of Earth the satellite can see , how often it revisits , and what applications it is good for . Remote sensing satellites mainly use two standard orbits : Geostationary Orbit (GEO) Sun-Synchronous Orbit (SSO) Geostationary Satellites (GEO) Characteristics Altitude : ~35,786 km above the equator. Period : 24 hours → same as Earth's rotation. Orbit type : Circular, directly above the equator . Appears "stationary" over one fixed point on Earth. Concepts & Terminologies Geosynchronous = orbit period matches Earth's rotation (24h). Geostationary = special type of geosynchronous orbit directly above equator → looks fixed. Continuous coverage : Can monitor the same area all the time. Applications Weather...
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