Nathan Shephard introduces new lidar visualization, analysis, and dissemination capabilities that will be a core component of ArcGIS 10.1.
00:01 Lidar often contains hundreds of millions of points stored in multiple files…
00:05 …making for a data management, analysis, and dissemination nightmare.
00:10 Please welcome our lead 3D product engineer to take away the nightmare, Nathan Shephard.
00:19 Thanks, John.
00:22 Collections of lidar can be enormous, and they come with several requirements.
00:26 You want quick viewing, update an analysis, and you want to be able to manage and share that data with others.
00:32 At 10.1, ArcGIS has native support for lidar and all the tools you need for working with it.
00:39 Let's start with viewing lidar.
00:42 I recently downloaded some lidar from the USGS, about 10 million points, and are delivered in 20 LASS files.
00:53 To view this data, it's as simple as pointing to the folder containing those LASS files and hitting OK.
00:59 And in a few seconds, we're seeing lidar natively in ArcMap.
01:07 It's okay to clap.
01:10 By default, it's rendered as elevation points, but we can use other lidar attributes such as the class code.
01:17 Now we see blue points for the ocean, brown points for the ground, green points for vegetation.
01:25 It's a layer so we can change symbology and make our building points yellow.
01:30 Now lidar is 3D, so we've included a 3D preview window for lidar…
01:45 …and the ability to drag out a profile line and see it as a cross section.
01:52 You might notice that some of these points aren't classified yet, these light gray points.
01:56 And because the human is really good at recognizing objects from abstract things like treetops from a bunch of points…
02:04 …we can update those class codes directly in the source LASS files.
02:10 And, we've been looking at lidar as points. We can also look at lidar as a surface.
02:20 Right now I'm using all the points to generate a surface from my lidar…
02:25 …and it contains buildings and trees and outhouses, and it's a really good surface for doing line of sight.
02:32 We can filter our data, and we can use the ground points after I change it correctly to the right filter.
02:45 Now we can see that lidar as a surface, and this is good for slope analysis or creating contours.
02:54 So you add those in.
02:56 The point is, you can choose which points participate in your lidar surface…
03:00 … and then use it for many different types of analysis.
03:04 ArcScene also supports lidar, and in this view…
03:09 …you can see that that bare earth lidar surface is very messy and noisy over the ocean, over the bay.
03:15 We can use constraint features to improve that surface.
03:23 And, if we want to see our buildings and trees and boats and outhouses again…
03:30 …we can just add the nonground points as a second layer and then zoom in and continue to investigate our lidar.
03:46 So that's an introduction to quick viewing and analysis of lidar. Let's talk about data management and sharing.
03:53 At [ArcGIS] 10.1, the mosaic dataset has been expanded to also support lidar…
03:58 …so I can manage and look after my San Diego data using a mosaic.
04:03 I can use that same mosaic for all of my California lidar like the strip of lidar that's along the coast at Huntington Beach…
04:16 I can see the full extent of all my lidar.
04:19 The point is my lidar is managed.
04:23 Then, when it's time to share this lidar with others, we simply publish this mosaic out as and image service.
04:30 And when it's time to do our next project, say for Crafton Hills College…
04:34 …we simply connect to our Amazon server in the cloud, we drag in the image server, and we can see we have lidar coverage here.
04:44 This is a rasterized, hillshaded representation of my lidar.
04:49 If I need to work with the points, then the download option makes it easy for me to select…
04:55 …and then download the LASS files that I need for this area.
05:01 My lidar is shared and it's accessible.
05:11 To wrap up, let's look at a slightly different kind of lidar, lidar captured from the ground.
05:18 Here we have a hundred million points captured by NAVTEQ by their roaming trucks.
05:27 This data is really good for validating your existing GIS data such as the size, shape, and height of your buildings.
05:36 It also contains beautiful color values so it's adding some realism to my view.
05:43 By default, ArcScene is thinning out the number of points. I can always choose to see an area in full resolution.
05:59 Some of you are already using lidar.
06:00 Some of you have got lidar tucked away in bookshelves, cupboards, under your desk.
06:05 At [ArcGIS] 10.1, we really want you to get that lidar out, start working with it and taking advantage of these new capabilities.
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