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MG4 LiDAR Switches

When you create MrSID Generation 4 (MG4) LiDAR files, you can specify additional options.

Switch Notes
‑compressionratio / ‑cr The compression ratio to use when creating the file. The resulting file is a lossy file, which may have fewer points than the original point cloud. For example, entering a compression ratio of 10 will result in a file size that is 10 times smaller than the nominal size of the input image.
‑lossless The file that you compress will be compressed losslessly. This option is used by default.
‑blocksize / ‑bs The number of points to process and store at one time. Enter a large block size to increase compression speed. Enter a small block size to decrease memory usage. Valid values are from 2048 to 16384. The default value is 4096.
‑removeCustomVLRs Omit custom variable length record (VLR) metadata from LAS files. VLR metadata can include vendor-specific data, user-specified data, and more.
‑tempdir The directory to use for temporary files. Compressing LiDAR point clouds, especially large point clouds, creates many temporary files before writing output to a MrSID image. By default, GeoExpress uses the system-defined temporary directory for the user.