LineofSight Analysis Study for

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Line-of-Sight Analysis Study for City of
Irving Traffic Management System Tim
Williams POEC 6387 8/4/03
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Purpose Model Transmission Cone
Create Surface Extrude Buildings
Generate Line-of-Sight Rays
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• 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.

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Bush Turnpike
Airport Frwy / SH 183
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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.
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Upper limit of cone
18 targets at intersections
Transmitter at 60 on water tower
Lower cone
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Buildings, first ray. No apparent obstructions
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First ray, looking south
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Ray to three additional targets
Cyan ray shows building obstructions
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Green ray has building obstructions Cyan ray dips
beneath the surface.
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• 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)