Untwine

Untwine is software from Hobu, Inc. for creating Entwine Point Tile (EPT) or Cloud Optimized Point Cloud (COPC) web services from PDAL-readable point cloud data sources. It provides an alternative processing approach than the Entwine software, but the output is expected to be compatible EPT/COPC.

License

Untwine is licensed under the GPLv3. Commercial licensing is possible by contacting Hobu, Inc. for pricing.

Installation

Untwine is available on conda-forge (here) and can be installed using conda

conda install -c conda-forge untwine

Building Untwine:

The following steps will build the untwine executable:

mkdir build
cd build
cmake ..
make

Using Untwine

untwine [options]

Example:

untwine --files=some_directory --output_dir=output_directory

Options

• files

  Input files or directories containing input files. [Required]

• output_dir

  Output directory. [Required]

• a_srs

  Assign an output SRS. Example --a_srs EPSG:2056

• dims

  List of dimensions to load. X, Y and Z are always loaded. Limiting the dimensions can speed runtime and reduce temporary disk use.

• temp_dir

  Directory in which to place tiled output. If not provided, temporary files are placed in 'output_dir'/temp.

• cube

  Create a voxel structure where each voxel is a cube. If false, the voxel structure is a rectangular solid that encloses the points. [Default: true]

• level

  Level to use when initially tiling points. If not provided, an initial level is determined from the data. [Default: none].

• file_limit

  Only read 'file_limit' input files even if more exist in the 'files' list. Used primarily for debugging. [Default: no limit]

• stats

  Generate summary statistics in 'ept.json' similar to those produced by Entwine for EPT output Min/max stats are always generated when generating single-file output. [Default: false]

• single_file

  Generate a LAZ file with spatially arranged data and hierarchy information (COPC). [Default: false]

• preserve_temp_dir

  Normally untwine deletes its temporary directory where tiled data is written. Set this to true to preserve an existing temporary directory and its contents. [Default: false]

• progress_fd

  File descriptor number of a pipe using the Untwine API to send progress and error messages. [Default: -1]

• progress_debug

  Set to true to have progress messages written to standard output. Disabled if 'progress_fd' is set to '1'. [Default: false]