I. e. ii. 1. Ozone Layer
             Estimated time:
             2 minutes
Ozone is shown in maps as a square grid defining the area, so that each square has an ozone level attributed to it. You can change the coloring and number of colors for the ozone layer. Creating more or less visible differentiation between the Ozone concentrations. Changing the color scheme of any layer, on any project, can help in the evaluation of data, such as the distribution of ozone levels in a metropolitan area.
In this exercise, you will:
  • Change the graduated color scheme of the ozone layer


                                                   Start VideoDemo

Text Version:

    1. Make the “Ozone” polygon layer in a gradient color scheme. Right Click the "Ozone" layer in the table of contents and click on Properties

    2. Select "Symbology" from the Properties menu box

    3. Left click the Categories name in the “Quantities” Name in the show box to the left

    4. Left click “Graduated Colors”

    5. In the Fields box under Values select the time of day you have been assigned (HR1, HR2, . . . )

    6. In the Classification box choose 8 for Classes

    7. In the Color Ramp choose an appropriate color ramp

    8. Click Apply -> Click OK

Which way is the wind blowing? This can be accomplished by looking at the changes in Ozone concentration over the course of several hours. After looking at an hour go back into the Properties and change from the time of you have been assigned to the next time, do this several times. Which way does the ozone seem to move?

Where are ozone levels highest & lowest? What is common between the areas with high and low concentrations of ozone?