Log Message:
pdal-lib: update to 2.5.6

Among various bug fixes, these are the changes since 2.2.0:

2.5.6
    bug fixes

2.5.5
    bug fixes

2.5.4
    bug fixes

2.5.3
    bug fixes

2.5.2
Enhancements

    Provided allow_empty option to readers.gdal #3984

2.5.1
Enhancements

    Optional debug in filters.csf to improve performance #3952 (thanks
    @n4z4m3!)
    Connection classes for readers.copc and readers.ept consolidated
    (#3962)

2.5.0
Changes of Note

    TileDB 2.3 now required for TileDB read/write support (#3722)
    readers.fbx and readers.mrsid have been removed (#3841)
    Make PDAL Locale agnostic (#3873) Thanks @jjimenezshaw!
    Non-public symbols are now hidden on unix (#3931) Thanks @abellgithub!
    PipelineExecutor class is now deprecated (#3937)

New Stages

    readers.ptx (Thanks @dbrookes96!) supports reading the PTX
    format(#3718)
    writers.fbi and readers.fbi supports TerraSolid binary format(#3822)
    (Thanks @alavenant!)
    filters.trajectory estimates trajectory for certain data
    configurations (#3743)
    filters.geomdistance computes the (2D) distance of points to a given
    geometry (#3891)
    readers.stac dereferences STAC Catalogs to read point cloud data
    (#3915)
    filters.expression uses the same syntax as where to filter data
    (#3930)

Enhancements

    boundary_json GeoJSON added to pdal info output (#3750)
    Sort COPC output by GPSTime if available (#3747)
    filters.zsmooth enabled by default (#3785)
    update googletest to 1.12.1 by in (#3917)
    Support GDAL 64bit integer types if they are defined (#3795)
    PROJJSON output now added to pdal info output (#3780)
    QuickInfo now supports adding Metadata (#3894)
    stage-n-push support for writers.copc (#3790)
    pdal translate will not overwrite data by default (#3794)
    'bounds' option to limit filters.overlay usage (#3815)
    wmain usage of pdal comand for wide filename character support on
    Windows (#3824)
    binmode added to writers.gdal to count only points inside pixels
    (#3840)
    attr_dims and ogr_options options to writers.ogr (#3837) Thanks
    @rcoup!
    Add metadata to readers.las QuickInfo (#3897)
    writers.copc.threads option (#3910)
    Support spaces in dimension names (#3907)
    writers.copc.a_srs option (#3908)
    readers.copc outputs copc_info metadata on read (#3936)

2.4.3
Changes of Note

    A significant memory leak in LAZ decompression was fixed #3814
    PDAL's website is migrating to @readthedocs Thanks @j9ac9k! #3782

Enhancements

    writers.copc remote file writing was added #3819
    filters.overlay bounds option added #3815
    laz-perf vendored code updated to 3.1.0 release #3821
    Arbiter credentials now support profiles #3792

2.4.2
Changes of Note

None
Enhancements

    #3769 workshop documentation updates (Thanks @j9ac9k!)

2.4.1
Changes of Note

    writers.copc now sorts chunks by GPStime, allowing better compression.
    Various warnings for newer compilers have been eliminated.

Enhancements

    Errors from the geotiff library are now directed to the console
    (standard error).
    readers.bpf now adds a count of the number of points to metadata.
    The pdal info command now always writes a GeoJSON metadata entry of
    the area boundary called boundary_json.

2.4.0
Changes of Note

    A compiler that supports C++17 is now required to build PDAL or
    include PDAL headers in your code.
    The PDAL_STATIC_BUILD cmake option has been removed. We do not
    support building PDAL as a static library, though it may work.
    The behavior of readers.ept when specifying both bounds and polygon
    options has changed such that a point must pass both the filters
    independently in order to be accepted. (#3506)
    readers.ept will now ignore the spatial reference on a clip region
    if the point source has no spatial reference. This behavior is
    consistent with filters.crop. (#3580)
    readers.las and writers.las no longer support the laszip library. Both
    stages now use the lazperf library, which is embedded into the PDAL
    library. The compression option is still accepted in readers.las, but
    is ignored. The compression option on writers.las still accepts the
    LASZIP and LAZPERF , but those values are treated the same as TRUE.
    PDAL now builds on MinGW, though future support depends on community
    contributions.
    Source code supporting las and ept has been moved to a private
    namespace.

New Stages

    readers.copc and writers.copc have been added to support reading
    and writing of COPC files.
    readers.smrmsg was added to read from post-processed MMS accuracy
    files to be used with SBET data.

Enhancements

    The performance of filters.litree has been improved. (#3518)
    Support for time query/storage in readers.tiledb and writers.tiledb
    has been added. (#3495)
    Added various remote access support (AWS Fargate, AWS session token
    support, Azure SAS token support). (#3496)
    An error is now reported when reading a pipeline with multiple
    leaf nodes.
    Support for beam direction and origin in readers.rxp has been
    added. (#3565)
    Add a cmake macro PDAL_CREATE_PLUGIN that may simplify the creation
    of some PDAL plugin stages. (#3588)
    writers.null is now streamable. (#3591)
    Added support for multiple output files in writers.ply (#3617 -
    Thanks @longhuan2018)
    filters.csf now permits selective output of debugging/analysis
    files. (#3488)
    Comments in JSON input files (pipelines) are now supported. (#3670)
    Added support in writers.las for creating VLRs from metadata. (#3683)
    Added query support origin query in version 1.1 of EPT. (#3505)

2.3.0
Changes of Note

    GDAL version 3 is now required. (#3428)
    readers.tiledb now defaults to unordered reads. (#3267)
    readers.tiledb now supports Hilbert ordering. (#3345)
    writers.pcd now writes 32-bit floating point for X, Y and Z by
    default. (#3286)
    The GDAL error handler is redirected to its destination when PDAL
    logging stops. (#3244)

New Command

    Added pdal eval to print a classification report from two input
    point clouds. (#3346)
    Added pdal chamfer to calculate the chamfer distance, a metric used
    to quantify the similarity of two point clouds by evaluating the mean
    square distance of nearest neighbor correspondences between clouds.

New Stages

    filters.gpstimeconvert allows conversion between the various GPS
    time standards.
    filters.teaser uses the truncated least squares estimation and
    semidefinite relaxation (TEASER) algorithm to create a rigid
    transformation between two datasets.
    readers.draco reads the Draco format.
    writers.draco writes the Draco format.
    filters.zsmooth sets a dimension to a value determined by nearby
    points. (#3408)

Removed Stages

    readers.oci
    writers.oci

Enhancements

    pdal pipeline and pdal translate now support a --dims option that
    allows the stored dimensions to be easily controlled. (#3310)
    readers.las now reports and terminates on some previously undetected
    LAS file errors. (#3226)
    Added override_srs and default_srs options to readers.gdal to allow
    a raster with only NODATA to have an SRS. (#3271)
    Support was added for MSVC 2019. (#3292)
    Added text output of GeoTIFF keys to metadata when reading LAS
    data. (#3299)
    Added programmatic support to merge summary statistics. (#3321)
    Extra dimension names in a LAS file containing characters deemed
    illegal by PDAL are now converted by default to legal PDAL dimension
    names. (#3325)
    The sample filter is now streamable. (#3275)
    Added the --error_on_failure option to filters.reprojection to allow
    the program to terminate if a projection operation fails. (#3316)
    Added the --start option to readers.las to allow skipping some number
    of points. (#3313)
    Set the `ACCEPT_ENCODING' curl option to enable automatic
    decompression of HTTP replies.
    Improve error messages for LAS where a specified point format is
    not permitted. (#3324)
    Add the --where option to all writers. (#3319)
    Added a --nosrs option to readers.las to avoid reading the SRS
    information. (#3441)
    Improved performance of readers.ept in stream mode. (#3331)