Remote Sensing Techniques
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چکیده
Remote sensing is the observation and measurement of objects from a distance, i.e. instruments or recorders are not in direct contact with objects under investigation. Remote sensing depends upon measuring some kind of energy that is emitted, transmitted, or reflected from an object in order to determine certain physical properties of the object. One of the most common types of remote sensing is photography, which along with many other techniques is utilized for the images in this Lewis and Clark atlas.
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