laspy.compression module

LazBackend

class laspy.compression.LazBackend(value)

Bases: ILazBackend, Enum

Supported backends for reading and writing LAS/LAZ

LazrsParallel = 0

lazrs in multi-thread mode

Lazrs = 1

lazrs in single-thread mode

Laszip = 2

laszip backend

classmethod detect_available() → Tuple[LazBackend, ...]

Returns a tuple containing the available backends in the current python environment

DecompressionSelection

class laspy.compression.DecompressionSelection(value)

Bases: IntFlag

Holds which fields to decompress or not.

Only used for files with version >= 1.4 && point format id >= 6.

Ignored on other cases.

Each flag in the enum has a corresponding decompress_$name and skip_$name methods to easily create a selection.

>>> import laspy
>>> # Creating a selection that decompresses the base + z field
>>> selection = laspy.DecompressionSelection.base().decompress_z()
>>> selection.is_set(laspy.DecompressionSelection.Z)
True
>>> selection.is_set(laspy.DecompressionSelection.INTENSITY)
False

>>> # Creating a selection that decompresses all fields but the intensity
>>> selection = laspy.DecompressionSelection.all().skip_intensity()
>>> selection.is_set(laspy.DecompressionSelection.INTENSITY)
False
>>> selection.is_set(laspy.DecompressionSelection.Z)
True

New in version 2.4.

XY_RETURNS_CHANNEL = 1

Flag to decompress x, y, return number, number of returns and scanner channel

Z = 2

Flag to decompress z

CLASSIFICATION = 4

Flag to decompress the classification

FLAGS = 8

Flag to decompress the classification flags (withheld, key point, overlap, etc)

INTENSITY = 16

Flag to decompress the intensity

SCAN_ANGLE = 32

Flag to decompress the scan angle

USER_DATA = 64

Flag to decompress the user data

POINT_SOURCE_ID = 128

Flag to decompress the point source id

GPS_TIME = 256

Flag to decompress the gps time

RGB = 512

Flag to decompress the red, green, blue

NIR = 1024

Flag to decompress the nir

WAVEPACKET = 2048

Flag to decompress the wavepacket

ALL_EXTRA_BYTES = 4096

Flag to decompress all the extra bytes

classmethod all() → DecompressionSelection

Returns a selection where all fields will be decompressed

classmethod base() → DecompressionSelection

Returns a decompression selection where only the base x, y, return number, number of returns and scanner channel will be decompressed

classmethod xy_returns_channel() → DecompressionSelection

Returns a decompression selection where only the base x, y, return number, number of returns and scanner channel will be decompressed

to_lazrs() → lazrs.DecompressionSelection

to_laszip() → int

is_set(mask) → bool

decompress_all_extra_bytes()

skip_all_extra_bytes()

is_set_all_extra_bytes()

decompress_classification()

skip_classification()

is_set_classification()

decompress_flags()

skip_flags()

is_set_flags()

decompress_gps_time()

skip_gps_time()

is_set_gps_time()

decompress_intensity()

skip_intensity()

is_set_intensity()

decompress_nir()

skip_nir()

is_set_nir()

decompress_point_source_id()

skip_point_source_id()

is_set_point_source_id()

decompress_rgb()

skip_rgb()

is_set_rgb()

decompress_scan_angle()

skip_scan_angle()

is_set_scan_angle()

decompress_user_data()

skip_user_data()

is_set_user_data()

decompress_wavepacket()

skip_wavepacket()

is_set_wavepacket()

decompress_xy_returns_channel()

skip_xy_returns_channel()

is_set_xy_returns_channel()

decompress_z()

skip_z()

is_set_z()