1. Line-of-Sight Analysis Study for City of Irving
Traffic Management System
Tim Williams
POEC 6387
8/4/03

2. Purpose: Model Transmission Cone
Create Surface & Extrude Buildings
Generate Line-of-Sight Rays

3. Used spot elevations to generate a TIN for a selected part of Irving.
Added and extruded one source (60’ tall water tower) and several
targets (18’ tall receivers at intersections)
Added buildings and extruded based on footprint size.
Created TINs to represent Line-of-Sight from tower to intersections.

4. Bush Turnpike
Airport Frwy / SH 183

5. Transmitter
Coverage area is 60 degrees horizontally &
3 degrees +/- the horizon. The Water tower
on which the transmitter would be located is
at the apex of the sector.

6. Upper limit of cone
18’ targets at intersections
Transmitter at 60’
on water tower
Lower cone

7. Buildings, first ray.
No apparent obstructions

8. First ray, looking south

9. Ray to three additional targets
Cyan ray shows building obstructions

10. Green ray has building obstructions
Cyan ray dips beneath the surface.

11. Conclusions and Recommendations:
Using the rotate tool in ArcScene causes the view to be displayed in wireframe
due to large file sizes. Fly-through tool also shows only in wireframe.
Building heights should be modeled more realistically, by LIDAR and
checked by site inspection.
Solids could be ‘extruded’ horizontally with custom VB code using the
Cylinder Multipatch method. (Nathan Shephard-ESRI)