Soil sensitivity for the county was estimated based on other themes located in the Geologic Atlas. Most notably, the large soils database has parallels to the data you will use for this layer. Fortunately, the sensitivity data is much easier to interpret than the soils data. However, be certain that you understand its limitations.
Double-click on the sensitiv.shp theme. You do not need all the data contained in this theme. In fact, displaying all the data will confound the reader and clutter the map. Double-click on the name of the theme to open the legend editor. Follow the steps below.
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In the legend editor select graduated color. Use the rating field to sort the data (Values Field). To change all colors you select color themes at the bottom of the window. To change color types double click on the blocks under the word "Symbol". You can use the shift key to select more than one block. The theme should take on the appearance of the block below. You may wish to adjust the colors from the ones shown. VH stands for Very Highly sensitive soil (red?). W stands for water (blue?).
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Once you have the theme's colors and fields ready check the box to display the data.
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This is the data displayed under the data for groundwater movement. Note the the values (labels) on the groundwater lines have been removed. Note also that water has been given a blue diagonal stripe to distinguish it from the soils. In which part of this graph would a spill have the greatest impact on the region? Why? You may wish to compare this layer with the soils layer. The key for the soils layer is in a three ring binder in your teacher's office. |
