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tf_point_cloud_metadata

Returns metadata for one or more las or laz point cloud/LiDAR files from a local file or directory source, optionally constraining the bounding box for metadata retrieved to the lon/lat bounding box specified by the x_min, x_max, y_min, y_max arguments.
Note: specified path must be contained in global allowed-import-paths, otherwise an error will be returned.
SELECT * FROM TABLE(
tf_point_cloud_metadata(
path => <path>,
[x_min => <x_min>,
x_max => <x_max>,
y_min => <y_min>,
y_max => <y_max>]
)
)
Input Arguments
Parameter
Description
Data Types
path
The path of the file or directory containing the las/laz file or files. Can contain globs. Path must be in allowed-import-paths.
TEXT ENCODING NONE
x_min (optional)
Min x-coordinate value for point cloud files to retrieve metadata from.
DOUBLE
x_max (optional)
Max x-coordinate value for point cloud files to retrieve metadata from.
DOUBLE
y_min (optional)
Min y-coordinate value for point cloud files to retrieve metadata from.
DOUBLE
y_max (optional)
Max y-coordinate value for point cloud files to retrieve metadata from.
DOUBLE
Output Columns
Name
Description
Data Types
file_path
Full path for the las or laz file
Column<TEXT ENCODING DICT>
file_name
Filename for the las or laz file
Column<TEXT ENCODING DICT>
file_source_id
File source id per file metadata
Column<SMALLINT>
version_major
LAS version major number
Column<SMALLINT>
version_minor
LAS version minor number
Column<SMALLINT>
creation_year
Data creation year
Column<SMALLINT>
is_compressed
Whether data is compressed, i.e. LAZ format
Column<BOOLEAN>
num_points
Number of points in this file
Column<BIGINT>
num_dims
Number of data dimensions for this file
Column<SMALLINT>
point_len
Not currently used
Column<SMALLINT>
has_time
Whether data has time value
COLUMN<BOOLEAN>
has_color
Whether data contains rgb color value
COLUMN<BOOLEAN>
has_wave
Whether data contains wave info
COLUMN<BOOLEAN>
has_infrared
Whether data contains infrared value
COLUMN<BOOLEAN>
has_14_point_format
Data adheres to 14-attribute standard
COLUMN<BOOLEAN>
specified_utm_zone
UTM zone of data
Column<INT>
x_min_source
Minimum x-coordinate in source projection
Column<DOUBLE>
x_max_source
Maximum x-coordinate in source projection
Column<DOUBLE>
y_min_source
Minimum y-coordinate in source projection
Column<DOUBLE>
y_max_source
Maximum y-coordinate in source projection
Column<DOUBLE>
z_min_source
Minimum z-coordinate in source projection
Column<DOUBLE>
z_max_source
Maximum z-coordinate in source projection
Column<DOUBLE>
x_min_4326
Minimum x-coordinate in lon/lat degrees
Column<DOUBLE>
x_max_4326
Maximum x-coordinate in lon/lat degrees
Column<DOUBLE>
y_min_4326
Minimum y-coordinate in lon/lat degrees
Column<DOUBLE>
y_max_4326
Maximum y-coordinate in lon/lat degrees
Column<DOUBLE>
z_min_4326
Minimum z-coordinate in meters above sea level (AMSL)
Column<DOUBLE>
z_max_4326
Maximum z-coordinate in meters above sea level (AMSL)
Column<DOUBLE>
Example
SELECT
file_name,
num_points,
specified_utm_zone,
x_min_4326,
x_max_4326,
y_min_4326,
y_max_4326
FROM
TABLE(
tf_point_cloud_metadata(
path => '/home/todd/data/lidar/las_files/*2010_00000*.las'
)
)
ORDER BY
file_name;
file_name|num_points|specified_utm_zone|x_min_4326|x_max_4326|y_min_4326|y_max_4326
ARRA-CA_GoldenGate_2010_000001.las|2063102|10|-122.9943066785969|-122.9772226614453|37.97913478250298|37.99265200734278
ARRA-CA_GoldenGate_2010_000002.las|4755131|10|-122.9943056338411|-122.9772184796481|37.99265416515848|38.00617135784082
ARRA-CA_GoldenGate_2010_000003.las|4833631|10|-122.9943045883859|-122.9772142950517|38.00617351665583|38.01969067717678
ARRA-CA_GoldenGate_2010_000004.las|6518715|10|-122.9943035422309|-122.9772101076538|38.01969283699149|38.03320996534712
ARRA-CA_GoldenGate_2010_000005.las|7508919|10|-122.9943024953755|-122.9772059174526|38.03321212616189|38.04672922234828
ARRA-CA_GoldenGate_2010_000006.las|7442130|10|-122.9943014478193|-122.977201724446|38.04673138416345|38.06024844817669
ARRA-CA_GoldenGate_2010_000007.las|5610772|10|-122.9943003995618|-122.9771975286321|38.06025061099263|38.07376764282882
ARRA-CA_GoldenGate_2010_000008.las|3515095|10|-122.9942993506024|-122.9771933300088|38.07376980664591|38.08728680630115
ARRA-CA_GoldenGate_2010_000009.las|1689283|10|-122.9942898783015|-122.9771554156435|38.19544116402802|38.20895787388029
Last modified 9mo ago