Remote sensing: Types, advantages and disadvantages
Meaning of remote sensing Remote sensing is the Collection of data by a recording device that is not in direct contact with the area. Examples: Satellites, aircraft, drones, and aerial photographs types of remote sensing active remote sensing - this involves sending radiation out and then measuring the radiation that the earth is sending back e.g ocean current passive remote sensing - measures the energy that is radiated from the earth e.g temperature ADVANTAGES OF REMOTE SENSING: Allows coverage of very large areas. Can access inaccessible areas. Easy collection of data over a variety of scales and resolutions. There is no limitation on the extent of information that can be gathered from a single remotely sensed image. Data can easily be processed and analysed fast using a computer. Does not disturb the object or the area of interest. Cheap and fast method of collecting data of large areas. It is easier to locate floods or forest fire that has spread over a large region which...