FIGURE C-1 A road network represented at three spatial resolutions by raster (left) and vector (right) data. SOURCE: I. Heywood, S. Cornelius, and S. Carver, 2002, An Introduction to Geographical Information Systems, 2nd Ed., Upper Saddle River, N.J., Pearson Education, p. 53, ©2002. Reproduced with permission of Pearson Education, Inc., Upper Saddle River, N.J.
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Appendix C: Digital Geographic Data Available in the United States ."
Licensing Geographic Data and Services . Washington, DC: The National Academies Press,
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