To Create a Grid Volume Surface

1. Click Home tabCreate Ground Data panelSurfaces drop-downCreate Surface Find.

   In the Create Surface dialog box, in the Type list, select Grid Volume Surface.

2. Click to select a layer. For more information about layers, see Object Layer dialog box.
   Note: If you do not select a layer, the surface is placed on the current layer.
3. In the properties grid, click the Value column for the Name property and enter a name for the surface.
   Note: To name the surface, click its default name and enter a new name, or use the name template. For more information, see Name Template dialog box.
4. To change the style for the surface, click the Style property in the properties grid and click in the Value column.

   The Select Surface Style dialog box is displayed. For more information, see About Surface Styles and Visualization.

5. To change the render material for the surface, click the Render Material property in the properties grid and click in the Value column.

   The Select Render Material dialog box is displayed. For more information, see About Object Rendering.

6. Click the Base Surface property to select the base (bottom) surface. You can enter the surface name or click to open the Select Base Surface dialog box where you can select the surface in the list.
   Note: Select a surface in the drawing by clicking and following the instructions at the command line.
7. To set the grid parameters, such as spacing and orientation, enter their values into the Values column or click to use the drawing area to derive these values.
   Note: The grid spacing parameters determine how precise a surface volume is. For example, small grid spacing creates a precise volume measurement (but may increase the loading time).
8. Click the Comparison Surface property to select the comparison (top) surface. Enter the surface name or click to open the Select Comparison Surface dialog box where you can select the surface in the list.
   Note: Select a surface in the drawing by clicking and following the instructions at the command line.
9. Click OK to create the surface.

   The surface name is displayed under the Surfaces collection in the Prospector tree. For information about adding data to the surface, see About Adding and Editing Surface Data.