The last two bands image nearinfrared wavelengths. The imaging sensor produces visible and infrared images of the Earths surface. The development of color photography following World War II gave more natural depiction of surface objects. Some of these characteristics include Shape this characteristic alone serve to identify many objects. Date Viewed.

From their high vantagepoint, satellites have greatly extended view of the Earths terrestrial surface and oceans Figure 2e5. This wavelength cannot be captured with photographic film. Region Name Wavelength Comments Gamma Ray Entirely absorbed by the Earths atmosphere and not available for remote sensing. Such views are natural to the human eye and are part of our everyday experience.

CHAPTER 2 Maps, Remote Sensing, and GIS For example, foresters use aerial photographs for preparing forest cover maps, locating possible access roads, and measuring quantities of trees harvested. Pattern many objects arrange themselves in typical patterns. Satellite Remote Sensing In the revolution in remote sensing technology began with the deployment of the Landsat satellites. Figure 2e6 The Landsat enhanced Thematic Mapper instrument. The very dark area marked is Bracebridge Inlet which joins the Arctic ocean. Table 2e1 Major regions of the electromagnetic spectrum.

The last two bands image nearinfrared wavelengths. Source Google Earth. Early satellite remote sensors did not use conventional film to produce their images. As remote sensing device, Radarsat is quite different from the Landsat and SPOT satellites. Size noting the relative and absolute sizes of objects is important in their identification. Source Landsat Home Page. Table 2e1 Major regions of the electromagnetic spectrum. Can be imaged with photographic film. Texture, just like object size, is directly related to the scale of the image determines the absolute size of an object.

Texture, just like object size, is directly related to the scale of the image to be analyzed. Figure 2e7 SPOT falsecolor image of the southern portion of Manhatten Island and part of Long Island, New York. The imaging sensor produces visible and infrared images of the Earths terrestrial surface and oceans Figure 2e5. Humans and many other types of animals accomplish this task with aid of eyes or by the sense of smell or hearing. One sensing system produces black and white panchromatic images from the visible band 0. 51 to micrometers with ground resolution of meters.