Vr Mapping |
ON-LINE REFERENCE DOCUMENTATION CARDINAL SYSTEMS, LLC |
LAS In (LasIn)
Type: Translator
Translates LAS (LiDAR Archive Standard) files into VrOne files.
The LAS file format is a public file format for the interchange of LiDAR data between computer systems. This binary file format consists of point coordinate data along with up to 16 attributes per point. The LAS In and LAS Out translators provided maintain these attributes in the Vr Mapping database. The translation of LAS data to and from the Vr Mapping database requires very few parameters. The LAS translators are based on the LAS Specification Version 1.2 which was approved by the ASPRS board on September 2nd, 2008.
LiDAR points are stored as Vr Points and maintain LAS defined point attributes.
Loads previously recorded LAS In (.lap) parameter file.
Records current translation parameters to a LAS In (.lap) parameter file.
Allows all LAS input files to be selected. Also allows a VrOne output file to be defined for each input file. Looks for files with an extension of .las by default, but will attempt to read in any file chosen.
The VrOne output filenames will only be used if the "Translate to separate VrOne files" option is on.
The Define Input Filenames dialog box
Add Files
Pressing this button will be display a standard VrOne file selection dialog. All files selected will be added to the list of Input files. A VrOne output filename will be generated based on each input filename.
Remove All
Pressing this button will remove all files from the Input file table.
Change Output Directory
Allows the changing on the output directory (folder). By default the output directory is the same as the input file directory
Allows editing of general translation parameters.
The Edit Parameters dialog Box
Translate to separate VrOne files?
If this is on, then each LAS input file will be translated to a separate VrOne file. The Input to Output filename cross-reference is set in the "Define Input Filenames" dialog.
Target scale for new VrOne files (1:n)
If the "Translate to separate VrOne files?" is on, and a VrOne file does not exist during translation, then this Target scale will be used when creating the new VrOne file.
Layer for points
Points that are translated will be placed in the layer defined.
Translate deleted LAS points?
One of the attributes stored with each LiDAR points is a delete flag which allows points in the database to be marked as deleted. If this parameter is selected then deleted points will be translated. Deleted points that are translated with retain the delete flag in the Vr Mapping database.
Maximum RGB value
Defines the maximum RGB values that are expected in the LAS file. The Vr Point structure defines the RGB range as 0-255. If the Maximum RGB value is greater than 255 then the incoming RGB files will be scaled to the range of 0-255.
Scans the currently defined LAS files and displays various information including coordinate, intensity and RGB ranges.
The Scan Files information box
Begins the file translation process. All files that were defined by the “Define input Filenames” option will be imported.
The Translation information box
Starts the browser and displays the current help document.
Quits LAS In and gives an option to save the current parameters if they have been changed.