Calculating area of sight

Area of Sight is a set of imaginary straight lines joining the centre of the observer's and other points located at a distance constant from the observer. These set of lines appear as a set of radii with observer as the centre. The Area of Sight command allows you to identify the visible and invisible parts to the observer at a specified distance. The area visible appears is represented by green and area invisible by red.

 

Figure 297 

Area of Sight

1.	View the map in 3D mode. For more information, see Viewing the Map in 3D mode.

2.	Navigate to reach the view extent of the 3D map that you want to analyze.

3.	If the Map tools pane is not expanded, in the map viewer, click the Map Tools button.

4.	On the Map Tools pane, click the More Tools button and then select Area of Sight. The Area of Sight dialog box appears.

5.	Click the icon next to the View From field, and click a location on the map. The View From field gets populated by the coordinates of the selected location.

6.	Click the icon next to the View To field, and click a location on the map. The View To field gets populated by the coordinates of the selected location.

7.	In the Eye Height field, specify height of observer’s eye.

8.	Click Show. The distance between the specified coordinates is calculated based on which the area of sight is displayed on the map.