Remote sensing involves measuring an object from a distance, either via a plane or a satellite. We use photographic or satellite images to gather spatial data. This data is based on the electromagnetic energy spectrum which is energy emitted from the sun. Sensors capture this energy when it is reflected.
Some advantages of this type of information are:
-raster based
-provides detailed geometrically accurate record (can take out distortion)
-broad area coverage
Two main types of distortion are terrain displacement and camera tilt. Both of these can be corrected. Orthophotography is the term for photos that have had distortion taken out.
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