Rediscovering Geography New Relevance for Science and Society (1997) / Chapter Skim
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Pages 235-246
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Copyright 1990 by the Ohio State University Research Foundation.
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Color represents the transport capacity of the surface showing its directional derivative (topographic potential for erosion and deposition)
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data, digital files of elevation and bathymetry, and data on land cover. The figure shows year 2100 sealevel rise scenarios for (a)
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Population size, racial composition, and land use in a Columbia, South Carolina, neighborhood. Source: Cowen et al.
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o 0.01 - 5 5.01 - 10 10.01 - 15 15.01 - 20 ' 20.01 - 2s , 25.01 - 30 30.01 - 40 40.01 - 50 50.01 - 60 60.01 -70 70.01 - 80 80.01 - 90 90.01 - 95 , 95.01 - 100 km PLATE 5. A map showing the characteristics of land cover through the measurement of greenspace (i.e., trees, shrubs, and grass)
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Grid cells for which the value is highly reliable are completely filled. As cell estimates become less certain, the proportion of the cell filled with a shade of red decreases to the point at which the DIN level of highly unreliable cells cannot be interpreted at all.
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The difference among the possibilities results from manipulation of a weighting parameter that adjusts the extent to which each pixel's immediate neighbors are taken into account in assigning a pixel to a vegetation class. High spatial weighting produces more homogeneous regions with few isolated pixels (by assigning pixels whose reflectance puts them near a class boundary into the class most similar to that of their neighbors)
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in grain yields under climate changes predicted by three general circulation models: GISS, Goddard Institute for Space Studies model; GFDL, Geophysical Fluid Dynamics Laboratory model; UKMO, United Kingdom Meteorological Office model. The left column isolates the effects of climate change on grain yields.
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G S SPLATE 9. Images depicting urbanization in the San Francisco Bay area for three time periods: l90O, 1940, and 1990.
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PLATE 10. Satellite images of the lower Mississippi River Valley near Glasgow, Missouri.
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