MSL101L04 Basic Map Reading SR.pdf lesson 4.pdf

Digital maps a digital map also called digital

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Digital maps. A digital map (also called digital cartography) is the visual representation of a point on the earth as depicted by electronic data that is compiled and formatted into a virtual image. Early digital maps had the same basic functionality as paper maps, providing a virtual view based on scanned images of paper maps already in use. Virtual views of topographic maps are only part of the current digital mapping capabilities. In many cases,
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Maps 15 November 2013 TC 3-25.26 2-5 Soldiers can choose from virtual maps, satellite images, and hybrid views (with or without mission command overlays). Often, displays may be layered, and the Soldier can choose from one or multiple layers using a dropdown menu. Digital city graphic. The features of a digital city graphic include important buildings, airfields, military installations, industrial complexes, embassies, government buildings, hospitals, schools, utilities, and places of worship. A guide to numbered buildings and an index to street names are provided in the margin. Contour lines are in sufficient detail to identify spurs, draws, saddles, hill tops, and concave/convex slopes. Digital city graphic maps can be used for mission planning and navigation, and are often used in military operations in urban terrain, noncombatant evacuation operations, attaché support, and civil disturbance missions. Controlled image base. A controlled image base is an unclassified seamless dataset of geometrically corrected orthophotos, or aerial images, made from rectified grayscale images. It supports various weapons, mission command theater battle management, mission planning, digital moving map, terrain analysis, simulation, and intelligence systems. Controlled image base data are produced from digital source images, and are compressed and reformatted to conform to the national imagery transmission format. It may be derived from a grayscale image, one band of a multispectral product, or from a combination of several multispectral bands. Applications for the controlled image base include rapid overview of areas of operations, map substitutes for emergencies and crisis, metric foundation for anchoring other data in mission command systems or image exploitation, correct positional images for draping in terrain visualization, and image backgrounds for mission planning and rehearsal. Compressed arc digitized raster graphic. This is a joint services' standard map background product produced in multiple scales that support systems with map background display, coordinates selection, and provides perspective view generation capabilities. It is a common compression of arc digitized raster graphic for use in any application requiring rapid display of a map image, manipulation of the image, or manipulation of the image of a map in raster form.
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