Introducing Geographic Information Systems with ArcGIS: A Workbook Approach to Learning GIS, 3rd Edition

Looking at GeoGraphics

____ 27. On the Geography toolbar, click the Zoom In icon (a magnifying glass with a “+” sign in it). Copy the text in the ToolTip or Status Bar here: ____________________________________. Click on the upper-left hydrant. Note that it moves the center of the window and the distance between it and its neighbors has increased. You have zoomed in on the layer—not that you will see any more detail in this particular image, but you get the idea.

____ 28. Notice that although you have zoomed up on the image, the symbols representing the features did not get any bigger. So, this zooming action is somewhat different from looking at a paper map with a magnifying glass, which would increase both the distance between the points and the symbol size.

____ 29. Click again on the northwest hydrant and observe the results. Click between the hydrant and its neighbor to the south. Click the Full Extent icon (on the Geography toolbar) to restore the view of the entire layer and bring all hydrants back into view. With the Zoom In tool active, drag a box around the middle three hydrants in the middle column and observe. The lessons: You can zoom in by clicking on a point and also by dragging a box. The image is always re-centered, either at the point clicked or the center of the box.

____ 30. Click on the “hand” icon on the Geography toolbar—this is the Pan tool. Check out its function with the ToolTip. Move the cursor over the middle point, and drag that point to the left ...