Vertical Grid

By the object Vertical Grid grid calculations can be performed on vertical sections resulting in a colored vertical noise map. Vertical grids may be printed, copied or saved and reopened. Furthermore, vertical grids are displayed on the 3D-special view.

Example

The following example shows a road and two buildings.

Select the object Vertical Grid from the toolbox and draw a polygon with two points determining the location of the vertical grid. An arbitrary number of vertical grids can be entered. The default height for the vertical grid is 20 m. This height can be modified on the dialog Geometry. Up to this height the grid calculation is performed.

Vertical noise map up to 50 m height in the 3D-Special View

Vertical grid in conjunction with terrain

In the case of vertical grids used in conjunction with terrain data, grid points or areas below terrain are not displayed, see Line-like Objects, Height Extend of the vertical Grid.

Dialog options

When opening the dialog Vertical Grid the graphics uses the same scale as at the horizontal grid. By default, also the grid specification (see Grid Specification) and grid appearance settings (see Grid Appearance) of the horizontal grid are applied.

Dialog Vertical Grid

Option „Ray“

If this option is activated, the calculation ray is displayed. This function is only available if the vertical grid is created based on the ray (select “Cross Section” from the context menu of the ray).

Option „Sources“

Show sources that intersect with the vertical grid or are close to the vertical grid (e.g. for point sources).

Option „Global“

With this option activated (default) the settings of the horizontal grid are used. After deactivation of this option, individual settings of the grid can be edited using buttons „Specification“ and „Appearance“.

Button „Calculate“, option „automatically

Clicking the button „Calculate“ starts the calculation of the vertical grid. During this calculation the dialog remains open. When the option „automatic“ is activated, the vertical grid will be recalculated each time the horizontal grid is calculated. This requires to close the dialog first.

A grid interpolation selected (see General Tab) is not applied to vertical grids, but just to horizontal ones.

Button „Save as“

This button offers to save the vertical grid (file extension *.cnr).

Loading Vertical Grids

Saved vertical grids can be opened using the key combination ALT+O (letter „O“)

Display of Level

After calculation the sound level at the location of the mouse pointer is displayed in the upper part of the dialog (to the right of „Grid“).

Button „Copy“

Via this button the graphics is copied to the clipboard and can be inserted into another application using the key combination CTRL+V.

3D-Special View

With several active vertical grids in a file, the grids are displayed all together on the 3D-View (see 3D-Wire Model) and in the 3D-Special View (see 3D-Special View).

Grid transparency

Via the Properties menu of the 3D-Special view a transparency (%) to the vertical grid can be defined. This enables to display objects covered by the vertical grid.

PlotDesigner

Vertical grids can be referred to in PlotDesigner. This holds for the 3D-Special view and laos for sections as shown on dialog Vertical Grid (see Cell Properties, „Plan“ tab).

Grid Arithmetics

The generation of level difference grids is possible also with vertical grids. Proceed as follows:

Save the two grids to be subtracted from each other using the button „Save as“ on the dialog Vertical Grid.
Now, load one of the two vertical grids using the command Open on menu Grid.

Note

A current grid r0 is required for the calculation. The resulting grid is placed at the origin (x, y)=(0,0) in the xy plane. If necessary, expand the limits to check for the resulting grid (menu Options|Limits).

Open the dialog Grid Arithmetics from the Grid menu and load the two vertical grids, e.g. for R1 and R2.
Generate the difference grid, e.g. using the formula R2-R1, and save the resulting grid using a new filename.
Open the dialog Vertical Grid of the referring object and press the key combination ALT+O (letter „O“).

After loading the file the level difference grid is displayed (check for the level displayed when moving the mouse within the grid’s area).

Alter - as required - the options on dialog Appearance with respect to the level range of the difference grid.

Dialog Vertical Grid displaying a difference grid, using thecolor palette „pal_0_20_step_2“ with areas of equal sound level