00:04Simulating scenarios in 3D allows us to assess the impacts of a real-life project or plan.
00:10Using ArcGIS 10 and the 3D Analyst extension, we can do better analysis that saves time, helps us be more efficient…
00:17…and in the case of security or military applications, can even save lives.
00:22So I'm really excited to show you what I think is some fantastic analysis. Let's take a look.
00:27Some problems just can't be solved in the 2D world, and I think this is a great example of one of those problems.
00:34Here we're looking at a development that is going to be built on top of this hill.
00:38Now the requirements are that from these observation points we see in the background, the buildings can't be visible at all from these points of observation.
00:48So we have some unique tools at ArcGIS 10 that we can use to address this.
00:53So I'm going to search for the skyline tool, so we're going to see the skyline tools.
01:00And I can run this tool on one of these observation points or I can use these tools in a geoprocessing model.
01:08So I'm going to open up my geoprocessing model, and here we can see the Skyline and the skyline barrier tools.
01:16So I'm bringing in the points of observation, all six of them, so I can run them at once, and elevation.
01:22And what we're going to get is a really interesting analysis.
01:25So let's take a look.
01:26So here we see the skylines that have been created and these 3D fans that have been placed from the observation to the mountains.
01:34Let's turn those fans off, and here we can see the skylines.
01:39So from each point of observation, this is the maximum horizon that can be seen from that point.
01:46So you can see these blue lines correspond with the blue observation point.
01:52So I'll turn those barriers back on, and these fans are actually shown from the observation point, meaning that this is what we see from this point.
02:01Anything underneath these fans will not be displayed or viewed from these points of observation.
02:08So to continue answering our question of building heights, we can come in and turn on or generate some random lines, and I can just do a simple intersection.
02:18So here we see these 3D lines extruded.
02:21I can take these 3D fans and just intersect them right across these lines.
02:26The ending result is going to be the maximum height at which I can view or not see these buildings.
02:36So here we see those lines, and to better represent what we're looking at, I'm going to convert this line out to a raster surface, which I have already done.
02:46So let's take a look at that final result and turn off our lines.
02:49And here we can see a map showing where we can build and what height we can build in these particular zones.
02:57So I'll turn on my table of contents, come out. Here you can see that the area in green, any structure over four meters tall is visible from my observation point…
03:07…on to the pink and white area; we can go up to 30 to 40 meters and not be visible from the road.
03:14So this is certainly a unique scenario that we can use the powerful analytical tools in ArcGIS to solve.
03:22Your decisions have real-world 3D impact, so why use 2D to solve them?
03:27Take advantage of the analytical capabilities of ArcGIS 10 to extend your analysis to the 3D world.
Analysis Enabled by 3D
- Recorded: Jun 29th, 2010
- Runtime: 03:37
- Views: 8729
- Published: Aug 25th, 2010
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