Available with 3D Analyst license.
ArcScene is a 3D viewer that is well suited to generating perspective scenes that allow you to navigate and interact with your LAS dataset. You control a LAS dataset layer in ArcScene through the Layer Properties dialog box.
To access LAS dataset layer properties in ArcScene, right-click the LAS dataset layer in the table of contents and click Properties.
The General tab on the Layer Properties dialog box allows the layer display name and description to be modified. You can also set a scale range in which to display the LAS dataset layer.
The Source tab shows the bounding Extent of the LAS dataset. It also describes Data Source information, which includes the data type, location, name, z range, number of LAS files, number of surface constraints, number of LAS points, classification code statistics, and the coordinate system.
Surface Constraints tab
The Surface Constraints tab lists all of the surface constraints in which the LAS dataset is referencing. You can turn the surface constraints on or off using the Select All and Clear All buttons.
The Filter tab lists available filters that can be applied to the LAS dataset in ArcScene. The filters that are selected can be applied to the LAS dataset displayed as either points or as a surface. The Classification Codes, Returns, and Flags filter parameters can be used to filter the points for display and analysis. You can use the Predefined Settings filter settings to quickly select from common lidar filters. These common filters include All returns, Ground, Non Ground, and First Return.
The Display tab controls how the LAS dataset data is displayed as the view is changed in ArcScene.
- Point limit—Sets a size limit to the number of points used in the display of a LAS dataset layer. The default value is 800,000 for a surface view and 12,800,000 for a point view of a LAS dataset. If, for a given display extent, use of the settings would result in a surface that exceeds the specified point count, the layer will switch to be more generalized.
- Full resolution point allocation—The density of points to be enforced by the LAS dataset. This is set interactively by using the slider bar. Move the slider to the left for a coarse surface and to the right for a more fine or full surface resolution. As you move the slider bar, the Full resolution point allocation will change from 0 to 100 percent. By default, the density is set to 100 percent when all the points can be displayed.
- LAS files Extents—The Always display LAS file extents option will ensure that the bounding boxes used to show the extents of the LAS files are always displayed.
- Show Elevation as MapTips—Allows you to display the elevation as a MapTip as the pointer moves throughout the LAS dataset in ArcScene.
- Transparency—Can be used for any symbolization type, but it is especially useful for drawing surface layers with other layers on your surface. Adding transparency to the top layers allows you to see it while still viewing underlying layers. You can add transparency to a LAS dataset layer by changing the percentage to be applied to the LAS dataset in ArcScene.
The Symbology tab offers methods for representing a LAS dataset layer in ArcScene.
Several symbology renderers exist for LAS datasets. By default, ArcScene displays the points of the LAS dataset layer.
Changing the symbology renderer for a LAS dataset
- Click the Symbology tab.
- Click the Add button.
- Click the renderer that represents the terrain feature you want to display and click Add.
- Click Dismiss when you are finished adding renderers. The list updates to show what you want to draw.
- Click an element in the Show list.
- Click the Up or Down arrow key to change the element's draw order.
The LAS dataset features at the top of the list draw on top of those below them.
- Click OK.
Base Heights tab
To understand setting base heights, see Setting base heights in ArcScene.
To understand rendering in ArcScene, see Controlling when a layer is rendered in ArcScene.