Line of Sight Analysis

Figure 1. The scene shows the original file with its parade route, observer locations, elevation layer, and surrounding 3D buildings.

Figure 2. Sight lines were created from the observer point toward the parade route. These lines show the possible viewing paths.

Figure 3. The Line Of Sight tool was run using the elevation surface, the sight line layer, and the building subset. The output separates visible lines from blocked lines, with green representing visible sections and red showing areas where the view is obstructed.

Figure 4. I added the Length3D field to the LOS_Lines attribute table, which calculates the 3D distance of each sight line. This was used to remove lines that were too far away to be useful for the analysis.

Figure 5. After removing blocked lines and lines longer than the maximum viewing distance, the remaining green lines show the parts of the parade route that could be seen by the observer points under the first, 1100 ft visibility conditions.

Figure 6. The Parade Route Visibility model uses a SQL expression to remove lines that are not visible or are longer than 600 feet. This repeated the analysis much quicker under tthe reduced visibility condition.

Figure 7. The final result shows the line of sight coverage when the maximum visibility distance was reduced to 600 feet. The remaining green lines show that observer coverage became more limited under the reduced visibility setting.

Figure 8. ESRI Completion Certificate