The LAS Dataset Properties dialog box, in the Catalog pane, provides in-depth information about a LAS dataset. It allows you to view and understand detailed statistical information calculated from the LAS files referenced by the LAS dataset. LAS files and surface constraints can be added or removed using the LAS Dataset Properties dialog box. Detailed information about the classification, extents, and attributes for the point cloud data can be found through the LAS Dataset Properties dialog box.
To access LAS Dataset Properties, right-click the LAS dataset icon in the Catalog pane and click Properties. Also, the LAS Dataset Properties dialog box can be used for individual LAS or ZLAS files.
The General tab of the LAS Dataset Properties dialog box provides general, status, and extent information of the LAS dataset.
- Name—Name of the LAS dataset.
- LAS Files—Number of LAS or Optimized LAS (ZLAS) files present in the LAS dataset.
- Surface Constraints—Number of surface constraints represented in the LAS dataset.
- LAS Points—Total number of lidar points contained in the LAS dataset.
- Data Size—Total size of the LAS and ZLAS files that the LAS dataset is referencing.
- Uncompressed Size—Total size of the uncompressed data that the ZLAS contains. Use the Calculate Size button to calculate the total size of the uncompressed data. If no ZLAS files are present in the LAS dataset, the Calculate Size button is disabled.
- Store Relative Paths—The Store relative path names to data sources option allows you to move both the LAS files and the LAS dataset to different folder locations relative to one another.
- Extent—Extent and spatial units of the LAS dataset.
The Statistics tab lists statistical information for the entire LAS dataset.
If this button is available then changes have been made to the LAS dataset and the statistical information needs to be updated. You can update the statistics by clicking the Update button.
- Classification Codes—Statistics are calculated based on the classification completed on the LAS dataset. The statistics include the point count, the percentage of points in each classification code, the z minimum, the z maximum, the minimum intensity, the maximum intensity, and the synthetic point count.
- Attributes—Statistical information is calculated from the lidar attributes for the LAS dataset. The statistics include the minimum and maximum values.
- Returns—Statistical information is calculated based on the return values for the lidar points of the LAS dataset. The statistics include the point count, the percentage of points, the z minimum, and the z maximum.
- Classification Flag—Model key, Synthetic, overlap, and withheld flags can be set for each lidar point. These flags can be set along with the classification flag. The statistics include the point count and the percentage of the lidar points in each encoding flag for the LAS dataset.
LAS Files tab
The LAS Files tab on the LAS Dataset Properties dialog box provides detailed information for each contributing LAS file of the LAS dataset. You can quickly add or remove LAS files that are currently referenced by the LAS dataset, or initially add files to a newly created LAS dataset. Use the Add Files, Add Folders, and Remove buttons to edit the LAS files referenced by the LAS dataset.
You can change the displayed list of LAS files based on individual Files, Folders of files, or Spatial References, or by Missing Files through the Show drop-down list. The default view is of each LAS file, and the table lists the LAS File name, LAS Version, Point Count, Point Spacing, Z Min, Z Max, and a Details button.
The directory path will be listed for each file if the Show full path of LAS files option is selected.
Select the Details button to open statistical information for each individual LAS file referenced by the LAS dataset. Use the arrow buttons to browse through the statistical details for each file.
Surface Constraints tab
The Surface Constraints tab displays each surface constraint enforced in the LAS dataset. It provides information about the Height Source and Surface Feature Type for each contributing feature class.
You can add or remove surface constraints referenced by the LAS dataset, or initially add feature classes to a newly created LAS dataset. Use the Add and Remove buttons to edit the data referenced by the LAS dataset.