Displays of Level II isosurfaces are controlled by the Isosurface controls. The Radar Isosurface display type allows you to visualize radar data in the 3D, including all elevation angles, at specific data values. An example of when this display type can be useful is if you are looking for only very high reflectivity values that may coincide with a hail spike. WSR-88D Level II Radar data has three moments or data types: Reflectivity, Radial Velocity, and Spectrum Width, indicated by the 
icon in the Field Selector. WSR-88D Dual Pole radar includes these three moments, as well as DifferentialReflectivity, CorrelationCoefficient, and Differential Phase. In order for Radar Isosurface to be listed as a valid Display Type in the Field Selector, one of the moments (ex. Reflectivity, RadialVelocity, etc.) must be chosen in the Fields panel, not one of their individual elevation angles.
Image 1: Radar Isosurface Controls Properties Dialog
- Color Table - Shows the active color table and the associated high and low data values in the units of the display. As the mouse pointer is moved over the color bar, the value at a particular color is shown. Right click on the color bar or click on the button that displays the name of the Color Table to make modifications to the color bar. This allows you to open the Color Table Editor, change the range, select other color tables, etc.
- Smoothing - Smooths the display. There are seven types of smoothing: None, 5-point, 9-point, Gaussian Weighted, Cressman Weighted, Circular Aperture, and Rectangular Aperture. The amount of smoothness can be set for all except the 5 and 9-point smoothers. The higher the amount, the smoother the display. For the Cressman, Circular and Rectangular aperture smoothing types.
- Isosurface Value - Sets the isosurface value. Only radar data with this specific data value will be shown in the display. You can set this value by using the
button or by entering a value in the text field and pressing Enter.
Many of the menu items seen utilizing this display are standard options that can be found in the Menus section of the Layer Controls page. However, there is one option that is unique to this display.
The View menu has this unique option:
- Use Radar Projection - Re-centers the display and resets the zoom level back to the display's initial settings without changing any other preferences you have modified.