Geography 2122A/B Chapter Notes - Chapter 9: Photographic Film, Color Depth, Digital Mapping
16 Apr 2013
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In-order to nail down a specific color numerically, it requires 3 numbers. Color can be thought of as 3d object. Image maps remote sending: collecting images fo the eearth from a distance. Observing feature in the environment using films or instruments (sensors) that are sensitive to the energy emitted or reflected from objects. Aerial photography: the image which is taken from above he ground with a camera. Near-ultraviolet to near-infrared portion of the electromagnetic spectrum. Platform: the vessels, crafts or instruments from which the images are taken. For mapping two kinds of camera are in use: film camera (aerial mapping cameras, digital mapping camera. Aerial mapping cameras: produce individual pictures called frames (9-inch by 9-nich films, uses complex lenses to minimize geographical distortaion, mapping cameras are mounted on a gyrostabilizer. Digital mapping cameras: record picture electronically, instead of photographic film, they use ccd.
