Technically, what is the difference between photo, image, picture and raster? do they mean the same? or there is some distinction? is it true to say: " Normal 0 false false false EN-US X-NONE AR-SA Remotely sensed data can be obtained in two main forms: as image or photo. Image refers to the data collected by electronic sensor while photo refers to data acquired by camera lens (film) (Decker 2001). These two devices (camera and sensor) can be carried in several ways to collect data: aircraft or airborne (such as airplanes, helicopter, balloon, kite...), spacecraft or spaceborne (such as satellite) and ground based (such as vehicle, towers...)" Thank you Regards Jamal