las2las_filter¶

Description¶

This tool uses las2las to filter LiDAR points based on different attributes and to write the surviving subset of points to a new LAZ or LAS file. For more info see the las2las page and its online README file.

Parameters¶

verbose [boolean]

Generates more textual control output to the console.

Default: False

open LAStools GUI [boolean]

Starts the GUI of LAStools with pre-populated input files.

Default: False

input LAS/LAZ file [file]

The file containing the points to be processed.

filter (by return, classification, flags) [selection]

Filters points based on various options such as return, classification, or flags.

Options:

• 0 — —
• 1 — keep_last
• 2 — keep_first
• 3 — keep_middle
• 4 — keep_single
• 5 — drop_single
• 6 — keep_double
• 7 — keep_class 2
• 8 — keep_class 2 8
• 9 — keep_class 8
• 10 — keep_class 6
• 11 — keep_class 9
• 12 — keep_class 3 4 5
• 13 — keep_class 2 6
• 14 — drop_class 7
• 15 — drop_withheld

Default: 0

second filter (by return, classification, flags) [selection]

Also filters points based on various options such as return, classification, or flags.

Options:

• 0 — —
• 1 — keep_last
• 2 — keep_first
• 3 — keep_middle
• 4 — keep_single
• 5 — drop_single
• 6 — keep_double
• 7 — keep_class 2
• 8 — keep_class 2 8
• 9 — keep_class 8
• 10 — keep_class 6
• 11 — keep_class 9
• 12 — keep_class 3 4 5
• 13 — keep_class 2 6
• 14 — drop_class 7
• 15 — drop_withheld

Default: 0

filter (by coordinate, intensity, GPS time, ...) [selection]

Filters points based on various other options (that require a value as argument).

Options:

• 0 — —
• 1 — drop_x_above
• 2 — drop_x_below
• 3 — drop_y_above
• 4 — drop_y_below
• 5 — drop_z_above
• 6 — drop_z_below
• 7 — drop_intensity_above
• 8 — drop_intensity_below
• 9 — drop_gps_time_above
• 10 — drop_gps_time_below
• 11 — drop_scan_angle_above
• 12 — drop_scan_angle_below
• 13 — keep_point_source
• 14 — drop_point_source
• 15 — drop_point_source_above
• 16 — drop_point_source_below
• 17 — keep_user_data
• 18 — drop_user_data
• 19 — drop_user_data_above
• 20 — drop_user_data_below
• 21 — keep_every_nth
• 22 — keep_random_fraction
• 23 — thin_with_grid

Default: 0

value for filter (by coordinate, intensity, GPS time, ...) [string]

The value that is the argument for the filter selected above.

Default: (not set)

second filter (by coordinate, intensity, GPS time, ...) [selection]

Also filters points based on various other options (that require a value as argument).

Options:

• 0 — —
• 1 — drop_x_above
• 2 — drop_x_below
• 3 — drop_y_above
• 4 — drop_y_below
• 5 — drop_z_above
• 6 — drop_z_below
• 7 — drop_intensity_above
• 8 — drop_intensity_below
• 9 — drop_gps_time_above
• 10 — drop_gps_time_below
• 11 — drop_scan_angle_above
• 12 — drop_scan_angle_below
• 13 — keep_point_source
• 14 — drop_point_source
• 15 — drop_point_source_above
• 16 — drop_point_source_below
• 17 — keep_user_data
• 18 — drop_user_data
• 19 — drop_user_data_above
• 20 — drop_user_data_below
• 21 — keep_every_nth
• 22 — keep_random_fraction
• 23 — thin_with_grid

Default: 0

value for second filter (by coordinate, intensity, GPS time, ...) [string]

The value that is the argument for the filter selected above.

Default: (not set)

additional command line parameter(s) [string]

Specifies other command-line switches not available via this menu but known to the (advanced) LAStools user.

Default: —

Outputs¶

output LAS/LAZ file [file]

Specifies where the output point cloud is stored. Use LAZ for compressed output, LAS for uncompressed output, and TXT for ASCII.

Console usage¶

processing.runalg('lidartools:las2las_filter', verbose, input_laslaz, filter_return_class_flags1, filter_return_class_flags2, filter_coords_intensity1, filter_coords_intensity1_arg, filter_coords_intensity2, filter_coords_intensity2_arg, output_laslaz)

See also the las2las page and its online README file.