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

You Are Not Alone (Assuming you have an Internet connection)

____ 17. Make a new blank map. Add as data Boat_SP83.shp. There is a dropdown menu besides the Add Data button, which you probably haven’t noticed. Click it. Click Add Basemap. Assuming you have an Internet connection, you will see a dozen or so thumbnails of basemaps that are available over the web, courtesy of Esri. Select National Geographic. Click Add. Wait. (If nothing shows up after a few seconds, click the pan tool and move the map very slightly, to encourage the software to create the display.) You will see topography (by means of shading) and some roads. Note Interstate 75 for future reference. Type 50,000 in the scale box and then Pan, following I-75 north, to Lexington. Find Lexington Reservoir No 4 to the west of I-75, as you begin to get into the more developed area of Lexington. You could pan all the way to Toronto if you wanted to. This is a world-wide basemap. Type 4,000,000 into the scale box. Find Lake Ontario and Toronto, Canada. At a scale of 1:500,000 you can see that Toronto has an airport south of the city on an island in Lake Ontario. At 1:25,000 you can read the name of the Toronto Airport. __________________________.

____ 18. In the T/C click on the word Basemap, wait a second, and click again. You can now change its name to Basemap_NatGeo. Click the minus sign in front of the name to collapse the entry.

____ 19. Zoom to the GPS layer again. Again add a basemap—this time picking Imagery. ...