LASdataset properties

In the Properties panel of the LAS dataset, you can view details about the LAS dataset and LAS files. After selecting the LAS dataset in the Workspace Manager, right-click and choose the Properties item from the pop-up menu. This will open the Dataset Attribute panel on the right side of the map. In the Properties panel, you can view basic information, LAS files information, and statistical information of the LAS dataset.

Dataset

Click the Dataset option in the Properties panel to display the basic information and bounds information of the LAS dataset.

Basic Information: Includes dataset name, type, number of files, LAS point count, surface constraint, and pyramid information.

  • Dataset Name: Displays the name of the current LAS dataset.
  • Type: Shows that the current dataset type is LAS dataset.
  • Number of Files: Displays the quantity of LAS files managed by the current dataset.
  • LAS Point Count: Total number of lidar points contained in the LAS dataset.
  • Pyramid: Indicates whether pyramids are built for the LAS dataset.

Bounds: Layer bounds of the point cloud in the LAS dataset, maximum/minimum elevation of the point cloud.

  • Min: Minimum values of X, Y, and Z in the point cloud data of the LAS dataset.
  • Max: Maximum values of X, Y, and Z in the point cloud data of the LAS dataset.
  • Bounds: Union of all X and Y ranges across LAS files, and union of the elevation Z range.

Coordinate System

Click the Coordinate System option in the Properties panel to display the coordinate system information of the LAS dataset. Here, you can view the coordinate system, units, and coordinate system details, and modify the dataset's coordinate system.

Function descriptions for buttons in the coordinate system information toolbar:

  • Reset Coordinate System: Click this button to select a coordinate system from the dropdown list for resetting, or click More to open the Coordinate System Settings dialog and reconfigure the coordinate projection for the dataset. For specific setup methods, refer to the Projection Settings window.
  • Copy Coordinate System: Click this button to open the Copy Coordinate System dialog, where you can copy coordinate system information to use as the projection for the current dataset. The system provides two methods to copy coordinate systems:
    • Copy the coordinate projection from an existing data source in the current workspace.
    • Copy the coordinate projection from an existing dataset in the current workspace.
  • Export Coordinate System: Export the dataset's projection as a projection information file (.xml).
  • Import Coordinate System: Import a projection information file (*.xml) to set the dataset projection.
  • Project: Click this button to open the Project dialog, select a projection information file, and import it. Supported formats include Shapefile projection information files (*.shp;*.prj), MapInfo Exchange Format (*.mif), MapInfo TAB File (*.tab), image format projection information files (*.tif;*.img;*.sit), and projection information files (*.xml). For specific operations, refer to the instructions for the Project dialog in Project.

LAS files

View detailed attributes of each LAS file, including general information and comprehensive statistical data.

Click the LAS files option in the Properties panel to display a list of LAS files managed by this LAS dataset. The list shows LAS file names, file paths, LAS versions, and the Details button.

Click the Details button to open the Statistical Information dialog:

  • The left list shows the file list of the current LAS dataset. Select different file names to view statistical data for corresponding LAS files.
  • The right panel displays detailed statistical data for the selected LAS file, including general information, bounds, returns, attributes, and classification data.
  • Update: If the LAS file has been modified, this button becomes available. Click Update to update the statistical data. If no changes have occurred, the information is current by default, and the update button is unavailable.
  • Force Recalculation: If the update button is unavailable, check this option to force recalculation of statistical data for the current LAS file.

After updating the LAS files statistical information, the output window will notify that the statistical information calculation was successful. The program will generate a statistical file with the same name as the LAS file (LAS file name.lasa) in the LAS files directory. This file summarizes the statistical information of individual LAS files within the current dataset. If manually deleted, it requires recalculating the update.

Statistical Data

Calculate or update the statistical data for the entire LAS dataset.

  • If statistical data has not been calculated, the Calculate button is available. Click to calculate and display detailed statistical information for the current LAS dataset, supporting three types of statistical information: attributes, classification, and returns.

  • After clicking calculate, the button changes to Update. If LAS file information is modified, the Update button becomes available. Click Update to update the statistical data for the current LAS files.

After the LAS dataset completes the statistical calculation, the output window will notify that the statistical information calculation was successful. The program will generate a statistical file with the same name as the LAS file (LAS file name.lasa) in the LAS files directory. This file summarizes the statistical information of individual LAS files within the current dataset. If manually deleted, it requires re-executing the statistical calculation.

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