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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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Adding the Rasters with the Raster Calculator
Now you may perform addition on the four rasters whose names begin with rcl. You will use the Raster Calculator.
____ 36. Start the Raster Calculator. By double-clicking the raster names and single-clicking the plus (+) operator, create the expression that adds together the rasters
rcl_soils,
rcl_landu,
rcl_Sewers_buf, and
rcl_Streams_buf
shown in Figure 8-44. Click Evaluate. Call the raster SUM_LuSoStSw and save it in the Wildcat_Boat_SA personal geodatabase. It will appear in the T/C and on the map. What values are produced? ________, ______,______, _____. What value indicates those areas suitable in all respects? ________ Check it out with the Identify tool and the attribute table. In the T/C, change the colors of zones 1, 2, and 3 to light pink. Make zone 4 a dark red. The map should look a lot like the first solution to the Wildcat Boat problem that you developed in Chapter 7, but without the 2000 square meter criterion.

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