Hands On a busier roadway be considered more worthy of being designated a scenic byway? How? Following are a few analyses: River Analysis Turn on the rivers layer. Which of the four proposed bypasses seems to cross or follow the most rivers? What are the differences between rivers on eastern plains versus rivers in the mountains? How do rivers impact the scenery, and does considering rivers change the bypass that you most want to select? Why or why not? Urban Areas Analysis Turn on the cities layer. Which of the four proposed bypasses seems to be nearest cities? Symbolize the cities as graduated symbols based on the attribute Pop100. Which of the four proposed bypasses is nearest major cities? Does considering city locations and sizes change the bypass that you most want to select? Why or why not? Terrain Analysis Turn on the shaded relief layer. Which of the four bypasses traverses the most varied terrain and the flattest terrain? Does a consideration of the relief of the landscape as shown on the shaded relief layer change your judgment on which bypass should be selected? Why or why not? Looking at Data in 2D and 3D 1. Start ArcGIS Explorer and add the feature classes for existing and proposed scenic bypasses from your geodatabase. Does the 3D capability of ArcGIS Explorer change your answer to the previous questions in terms of which bypass is on the steepest or flattest terrain? Do you consider steep or flat terrain to be more scenic? Does the 3D perspective change your mind in terms of the bypass you most favor? Why or why not? 2. In ArcMap, create a layout that contains a title, north arrow, name, scale bar, legend, the selected bypass in a different color than the other byways, and any other information that you feel is necessary. How did the weights that you assigned to each of the six quality criteria affect the final score? 3. Rerun the calculations with your own weights. How did you weight the criteria, and why? 4. Give a presentation about what you have learned about scenic byways, how byways are selected, and how the spatial perspective and GIS enhanced your decision-making process. www.esri.com Conclusion In this exercise, you used spatial analysis techniques and data from a variety of sources to consider several criteria, weight them, and make a better decision. For additional exercises and instructional materials, visit www. esri.com/arclessons. This lesson incorporates querying spatial and attribute data, weighting factors, and symbolizing the results of analysis so a more informed decision can be made. Bypass Bypass 1 Bypass 2 Bypass 3 Bypass 4 Mean AADT Table 6: Mean Average Annual Daily Traffic (AADT) for bypasses Add the feature classes to ArcGIS Explorer to see if viewing the data in 3D changes your choice of byway. ArcUser Spring 2010 45