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Introducing Geographic Information Systems with ArcGIS: A Workbook Approach to Learning GIS, 3rd Edition by Michael D. Kennedy

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Examining the Surface with Various Spatial Analyst and 3D Tools
____ 3. On the 3D Analyst toolbar click the Create Contour icon. Then click a cell near the center of the map. You will see a line that represents all the locations you could visit without changing your elevation from the selected cell. If you tap Delete on your keyboard that closed line will go away. If you click elsewhere on the map you will get another contour line. Make several more contour lines.
Now click the icon of Create Steepest Path on the 3D Analyst toolbar. Again click a cell. Note that a line runs from that point downhill to a point of lower elevation. When you are through being experimenting, use the Select Elements cursor to draw a large box around the entire map. Press the Delete key to remove the contour lines and steepest path lines.
____ 4. Find and run the Contour (Spatial Analyst) tool. From the drop-down menu of Input raster, select ElevSurface. Make the contour interval 100, but use a base contour of some even hundred-number (ends in 00) under the altitude minimum, say, 1500. For output features browse to
___IGIS-Arc_YourInitials\Spatial_Analyst_Data\Hydrology_Data_SA
and name the feature ElevContours.shp. Click OK. Examine the contour lines added to the map and the conformance with the surface ElevSurface. Label the contour lines with the field CONTOUR. Zoom in on the hill top in the center of the map. Use Identify on two cells of the surface (ElevSurface) somewhere on opposite sides of ...

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