Characteristics and Examples of Spatial Data - Introducing Geographic Information Systems with ArcGIS - page 166

FIGURE 2-41
13. Open the attribute table of fyttelc06alii. Based on the value of Count, how many cells represent
open water? __________. Therefore, how many square miles of water would you calculate cover
land in Fayette County? _________. How about cultivated crops? ___________.
For another look at land cover, you will load a data set that describes land cover in the state of
Kentucky at a generalized level. You are being shown these two different data sets to illustrate
that different organizations select widely varying categories into which to place the activities
and conditions on Earth's surface.
14. Load as a layer MSU_SPNORTH, which is a raster found in [___]IGIS-Arc\Kentucky_wide_Data\
KY_Landuse_MSU\MSUdata. If asked, do not build pyramids. Turn all other image and polygon
layers off. Zoom to the full extent of the data set to get an idea of the amount of data. Zoom
into the GPS track. See Figure 2-42 (bearing in mind that your colors will be different, since the
software assigns colors at random). Based on the color of the cells and looking at the legend,
what would you say the code for water is? ______. What is the code for roads? _______. Verify
each of these using the Identify tool. Zoom further in so that you can measure the width of a
cell. What are the dimensions of the cells in this data set? _____________ feet. How much area
in each? ____________ square feet.