AERMOD View – Posting Concentrations
June 2016
Displaying model output is an integral part of air dispersion modeling. Concentration contour plots help modelers quickly identify trends and high concentrations from modeling projects. AERMOD View includes numerous visualization options to make the modeler’s job even easier.
One thing missing from a general concentration contour plot is the actual concentration value at each receptor. In AERMOD View, the Posting layer contains concentration values at each receptor. This can be enabled from the Contours Panel | Show Concentrations button or by checking the Posting layer in the Overlays Tree View.
One thing missing from a general concentration contour plot is the actual concentration value at each receptor. In AERMOD View, the Posting layer contains concentration values at each receptor. This can be enabled from the Contours Panel | Show Concentrations button or by checking the Posting layer in the Overlays Tree View.
Show Concentrations Button from Contours Panel
Posting Layer in the Overlays Tree View
If a project contains a lot of receptors, however, the Posting layer may be difficult to read without zooming in.
Contour Plot with Posting Enabled
The Posting display can be modified using the Graphical Options. From the main toolbar, select the Graphical Options button and then select the Posting options.
Some of the available options include:
Show Only Max Value: This option only posts the maximum concentration for the selected contour plot. Use the Max color field to make the value stand out (default color is red). The image below shows the same contour plot as above with the Show Only Max Value option enabled.
Show Only Max Value: This option only posts the maximum concentration for the selected contour plot. Use the Max color field to make the value stand out (default color is red). The image below shows the same contour plot as above with the Show Only Max Value option enabled.
Threshold: Define a threshold and highlight color and AERMOD View will highlight those concentrations that exceed the threshold to make them easier to find.
Filter: Only display concentrations within the user-specified range. The image below uses the Filter (>5) and Threshold (12.5) options.
Filter: Only display concentrations within the user-specified range. The image below uses the Filter (>5) and Threshold (12.5) options.
Other options such as font, label orientation, color, and more can be enabled. These options help users create great-looking graphics with minimal effort.
