MOUS_ICO Menu: Noise > Barriers > EditHeights…
or
MOUS_ICO Menu: Noise > Barriers > Dialog box…
MOUS_ICO Select one barrier in the list
MOUS_ICO Dialog box: Edit heights…
or
nco: Select one barrier (defined in Novapoint Noise)
MOUS_ICO
Popup menu: Edit
heights…
In this dialog box, you will see the horizontal alignment of the barrier in the figure to the right and the vertical alignment of the barrier in the lowest figure. The scale of these figures will be adjusted to make the most out of the space. The lowest figure has profile numbers along the horizontal axis and altitude above sea level along the vertical axis. In the figure to the right, the barrier has the same orientation as in the map.
The first time we get into this dialog box, the barrier is specified with elevation 0m (altitude). There are barrier points at the start and end of the barrier together with all horizontal break points (all points on the polyline defining the centerline of the barrier). For each barrier point, there is a height calculated from the terrain model.
Raise/lower barrier
Raises or lowers the whole barrier. In the field to the right of this button, the change in height is entered in meters. A negative value gives a lower barrier. The button Raise/lower barrier: must be clicked after entering a value to complete the change.
Max distance between points
Enters barrier points with a fixed internal distance. This may be relevant when constructing a barrier that is to follow the terrain. It may also be relevant to define a point for each barrier-pole, in order to get data for detailed barrier construction. The distance between the points in meters is entered in the field to the right. The button Max distance between points: must be clicked after entering a value to complete the change.
Basically, a barrier point is a point where the barrier has a break either in the horizontal or vertical direction. In addition, the barrier’s start and end points are defined as barrier points. The functions in this frame allow the user to change the barrier points. The profile number of a barrier point is the distance along the centerline of the barrier from its start point.
Delete
Deletes a barrier point. If a point representing a break in the horizontal direction is deleted, the horizontal alignment of the barrier will change, and by that, the profile numbers of the barrier points subsequent to the deleted point will change.
Profile
Shows the profile number of a barrier point. A new barrier point may be entered by specifying a new profile number in this field.
Set all
Enters the value from the field Interpolate height for all barrier points. The first and last barrier points cannot be set to be interpolated.
Interpolate height
By clicking this option, the height of this barrier point is interpolated from the height of the closest barrier points before and after the selected barrier point not specified as interpolated.
Set all
Sets the value from the field Absolute height for all barrier points.
Absolute height
The absolute height (meters above sea level) may be entered for each barrier point.
Fetch
Recalculates terrain heights for all barrier points.
It is important that feature codes and groups etc. are correct in the terrain model before terrain heights are fetched.
Terrain height
Height of the current barrier point, calculated from a cross-section in the terrain model.
The terrain height in a point may in theory become as much as 1 m wrong if the equidistance is one meter. On detailed design, one should therefore check the absolute heights.
Set all
Enters the value from the field Relative height for all barrier points. Note that this does not affect the value Interpolate height. In order for the barrier to completely comply with the terrain, Interpolate height must be off for all barrier points.
Relative height
Relative height (height above ground level) for each barrier point. Terrain heights have to be fetched before the relative heights for barrier points can be shown/used.
Areal
Shows the area of the barrier. Calculated as the sum of the trapezoids between barrier point peaks and calculated barrier point terrain heights.
Previous point
Moves to previous barrier point.
Next point
Moves to next barrier point.