| Abstract from DBPedia | Remote sensing is the acquisition of information about an object or phenomenon without making physical contact with the object, in contrast to in situ or on-site observation. The term is applied especially to acquiring information about Earth and other planets. Remote sensing is used in numerous fields, including geography, land surveying and most Earth science disciplines (e.g. hydrology, ecology, meteorology, oceanography, glaciology, geology); it also has military, intelligence, commercial, economic, planning, and humanitarian applications, among others. In current usage, the term remote sensing generally refers to the use of satellite- or aircraft-based sensor technologies to detect and classify objects on Earth. It includes the surface and the atmosphere and oceans, based on propagated signals (e.g. electromagnetic radiation). It may be split into "active" remote sensing (when a signal is emitted by a satellite or aircraft to the object and its reflection detected by the sensor) and "passive" remote sensing (when the reflection of sunlight is detected by the sensor).リモートセンシング (英: remote sensing) とは、原義的には一応、「離れた位置からセンシングすること」（遠隔地からセンサーを使って感知すること）やその手法・技法・技術のことである。広範囲のものを指しうる用語ではあるが、しかしこの用語は大抵はもっと狭義に用いて、人工衛星や航空機などから地球の表面（Earth's surface）付近を観測する技術を指すことが多い。 (Source: http://dbpedia.org/resource/Remote_sensing) |
