Photogrammetry orthophoto map aerial photograph were

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photogrammetry , orthophoto map . Aerial photograph: were taken from balloons in France, black and white and color photographs taken from airplanes had become crucial to the military. Photogrammetry: the science of obtaining reliable measurements and mapping from aerial photographs – had developed. Orthophoto map: a multi-colored, distortion-free photographic map prepared from aerial photographers or digital images. 20. What are some of the applications of color infrared imagery? Color infrared imagery uses electromagnetic sensors or photographic film sensitive to radiation in the near infrared portion of the electromagnetic spectrum – wavelengths of radiation just longer than the human eye can see. 21. What are some of the applications of thermal infrared imagery? Can be sensed with conventional digital cameras or traditional photographic film. 22. Describe multispectral remote sensing. The instruments detect any record many bands, or regions, of the electromagnetic spectrum simultaneously. 23. Compare and contrast radar , sonar , and lidar . Radar is capable of operating by day or night, but it is unique in its ability to penetrate atmospheric moisture. Sonar permits underwater imaging so that scientist can determine the form of Earth’s crust that is hidden by the world ocean. Lidar uses reflected laser light to measure distances. Geographic Information Systems (GIS) 24. Distinguish between GPS and GIS (geographic information systems) . GIS are computer systems designed to analyze and display spatial data. GIS software allows users to collect, store, retrieve, reorganize, and map geographic data from the real world. GPS is based on a constellation of at least 24 high-altitude satellites configured so that a minimum of four – preferably six – are in view of any position on Earth.
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