Pitney Bowes MapInfo Vertical Mapper - Manual (Page 202)

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Vertical Mapper 3.7
• The Hide When Over Null Value check box controls the display of a drape where it is
geographically coincident with null values on the grid that it is draped upon (see the next two
figures). These areas are made invisible.
The Preview Window
Located to the right of the 3D Viewer: Scene Properties dialog box, this Preview window displays
how the rendered scene will look with the current settings. The window will automatically refresh
when you modify the scene properties. The delay between modifying a setting and the subsequent
refresh of the window can be altered in the GridView Preferences dialog box. For more information,
see
Setting your Preferences on page 206 .
Another feature of the Preview window is the ability to query grid values. If you click while the cursor
is inside the window, then a tool tip will appear with information from the grids in the Layer/Grid
Height list box (see the next figure). This information includes the name of the grid(s) being queried,
the x- and y- coordinates of the selected location, and the value at that location. This feature is
available for any rendered scene.
Click the left mouse button to get information on the grids in the Layer/Grid Height list.
The OK button in the 3D Viewer: Scene Properties dialog box enables you to close the dialog box
and render the GridView scene with the current scene properties settings.
This figure shows a drape file
overlying a grid that has null values in
the lake area. This figure shows how the Hide
When Over Null Value setting
behaves when checked.