![]() Different map scales suit different needs. How are maps scaled? The Earth's landscape has to be scaled down proportionally so that the resulting map fits onto a piece of paper or a computer screen that is of a manageable size, and yet shows an appropriate level of detail. Our geologic maps that are available for sale or download can be accessed from our geologic maps page. What is a geologic map? For a good discussion of geologic maps, check our 'What are geologic maps and what are they used for?' page. The sequential images are used to monitor changes in vegetation density, urbanization, sea level, glacier size, and many other physical characteristics of the earth's surface. For any given spot on the earth's surface, an image is taken every few days. Only two Landsat satellites are in operation now. The sensor then records these data as different wavelengths to form the image. The sensor on each satellite is able detect distinctive types of electromagnetic radiation emitted by objects on the Earth's surface. Remote sensing is a process of collecting data from a distance. What is a LANDSAT image? Landsat images are produced by special satellites fitted with remote-sensing equipment. Topographic maps are available for sale from our main office in Socorro. Geological Survey offers a handy booklet that defines topographic maps and describes how they are made. What is a topographic map? A topographic map is a scaled, two-dimensional representation of the three-dimensional surface of the earth. What is meant by Township, Range, section?.What meant by "7.5 minute" and "15 minute" maps?.National Uranium Resource Evaluation database (NURE).Stephen Wells Bright Star Scholar Program.Notice of Right to Inspect Public Records.
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