Class for extracting information contained in LAZ file such as the public header block and variable length records. More...

#include <qgslazinfo.h>

Classes
struct	ExtraBytesAttributeDetails

struct	LazVlr

Public Member Functions
	QgsLazInfo ()
	Constructor for an empty laz info parser.

QgsPointCloudAttributeCollection	attributes () const
	Returns the list of attributes contained in the LAZ file.

QPair< uint16_t, uint16_t >	creationYearDay () const
	Returns the pair ( creation_year, creation_day ) extracted from the LAZ file public header block.

QgsCoordinateReferenceSystem	crs () const
	Returns the coordinate system stored in the LAZ file.

QString	error () const
	Returns an error string detailing what went wrong with reading the LAZ info.

uint32_t	evlrCount () const
	Returns the absolute offset to the first variable length record in the LAZ file.

QVector< ExtraBytesAttributeDetails >	extrabytes () const
	Returns the list of extrabytes contained in the LAZ file.

int	extrabytesCount () const
	Returns the number of extrabytes contained in the LAZ dataset.

uint64_t	firstEvlrOffset () const
	Returns the absolute offset to the first extended point record in the LAZ file.

uint32_t	firstPointRecordOffset () const
	Returns the absolute offset to the first point record in the LAZ file.

uint32_t	firstVariableLengthRecord () const
	Returns the absolute offset to the first variable length record in the LAZ file.

lazperf::header14	header () const
	Returns the LAZPERF header object.

bool	isValid () const
	Returns whether the LAZ header data passed to this class is from a valid LAZ file.

QgsVector3D	maxCoords () const
	Returns the maximum coordinate across X, Y and Z axis.

QgsVector3D	minCoords () const
	Returns the minimum coordinate across X, Y and Z axis.

QgsVector3D	offset () const
	Returns the offset of the points coordinates.

void	parseRawHeader (char *data, uint64_t length)
	Parses the raw header data loaded from a LAZ file.

void	parseRawVlrEntries (char *data, uint64_t length)
	Parses the variable length records found in the array data of length length.

uint64_t	pointCount () const
	Returns the number of points contained in the LAZ file.

int	pointFormat () const
	Returns the point format of the point records contained in the LAZ file.

int	pointRecordLength () const
	Returns the length of each point record in bytes.

QString	projectId () const
	Returns the project identifier contained in the LAZ file public header block (Optional field)

QgsVector3D	scale () const
	Returns the scale of the points coordinates.

QString	softwareId () const
	Returns the identifier of the software used to generate the LAZ file public header block.

QString	systemId () const
	Returns the system identifier contained in the LAZ file public header block.

QVariantMap	toMetadata () const
	Returns a map containing various metadata extracted from the LAZ file.

QPair< uint8_t, uint8_t >	version () const
	Returns the LAZ specification version of the LAZ file.

QByteArray	vlrData (QString userId, int recordId)
	Returns the binary data of the variable length record with the user identifier userId and record identifier recordId.

Static Public Member Functions
static QgsLazInfo	fromFile (std::ifstream &file)
	Static function to create a QgsLazInfo class from a file.

static QgsLazInfo	fromUrl (QUrl &url)
	Static function to create a QgsLazInfo class from a file over network.

static QVector< ExtraBytesAttributeDetails >	parseExtrabytes (char *rawData, int length, int pointRecordLength)
	Static function to parse the raw extrabytes VLR into a list of recognizable extrabyte attributes.

Detailed Description

Class for extracting information contained in LAZ file such as the public header block and variable length records.

Since: QGIS 3.26

Definition at line 38 of file qgslazinfo.h.

Constructor & Destructor Documentation

◆ QgsLazInfo()

QgsLazInfo::QgsLazInfo ( )

Constructor for an empty laz info parser.

Definition at line 29 of file qgslazinfo.cpp.

Member Function Documentation

◆ attributes()

QgsPointCloudAttributeCollection QgsLazInfo::attributes ( ) const

inline

Returns the list of attributes contained in the LAZ file.

Definition at line 120 of file qgslazinfo.h.

◆ creationYearDay()

QPair< uint16_t, uint16_t > QgsLazInfo::creationYearDay ( ) const

inline

Returns the pair ( creation_year, creation_day ) extracted from the LAZ file public header block.

Definition at line 81 of file qgslazinfo.h.

◆ crs()

QgsCoordinateReferenceSystem QgsLazInfo::crs ( ) const

inline

Returns the coordinate system stored in the LAZ file.

Definition at line 111 of file qgslazinfo.h.

◆ error()

QString QgsLazInfo::error ( ) const

inline

Returns an error string detailing what went wrong with reading the LAZ info.

Definition at line 63 of file qgslazinfo.h.

◆ evlrCount()

uint32_t QgsLazInfo::evlrCount ( ) const

inline

Returns the absolute offset to the first variable length record in the LAZ file.

Definition at line 108 of file qgslazinfo.h.

◆ extrabytes()

QVector< ExtraBytesAttributeDetails > QgsLazInfo::extrabytes ( ) const

inline

Returns the list of extrabytes contained in the LAZ file.

Definition at line 123 of file qgslazinfo.h.

◆ extrabytesCount()

int QgsLazInfo::extrabytesCount ( ) const

inline

Returns the number of extrabytes contained in the LAZ dataset.

Definition at line 103 of file qgslazinfo.h.

◆ firstEvlrOffset()

uint64_t QgsLazInfo::firstEvlrOffset ( ) const

inline

Returns the absolute offset to the first extended point record in the LAZ file.

Definition at line 106 of file qgslazinfo.h.

◆ firstPointRecordOffset()

uint32_t QgsLazInfo::firstPointRecordOffset ( ) const

inline

Returns the absolute offset to the first point record in the LAZ file.

Definition at line 97 of file qgslazinfo.h.

◆ firstVariableLengthRecord()

uint32_t QgsLazInfo::firstVariableLengthRecord ( ) const

Returns the absolute offset to the first variable length record in the LAZ file.

Definition at line 31 of file qgslazinfo.cpp.

◆ fromFile()

QgsLazInfo QgsLazInfo::fromFile ( std::ifstream & file )

static

Static function to create a QgsLazInfo class from a file.

Definition at line 279 of file qgslazinfo.cpp.

◆ fromUrl()

QgsLazInfo QgsLazInfo::fromUrl ( QUrl & url )

static

Static function to create a QgsLazInfo class from a file over network.

Definition at line 297 of file qgslazinfo.cpp.

◆ header()

lazperf::header14 QgsLazInfo::header ( ) const

inline

Returns the LAZPERF header object.

Definition at line 127 of file qgslazinfo.h.

◆ isValid()

bool QgsLazInfo::isValid ( ) const

inline

Returns whether the LAZ header data passed to this class is from a valid LAZ file.

Definition at line 60 of file qgslazinfo.h.

◆ maxCoords()

QgsVector3D QgsLazInfo::maxCoords ( ) const

inline

Returns the maximum coordinate across X, Y and Z axis.

Definition at line 95 of file qgslazinfo.h.

◆ minCoords()

QgsVector3D QgsLazInfo::minCoords ( ) const

inline

Returns the minimum coordinate across X, Y and Z axis.

Definition at line 93 of file qgslazinfo.h.

◆ offset()

QgsVector3D QgsLazInfo::offset ( ) const

inline

Returns the offset of the points coordinates.

Definition at line 79 of file qgslazinfo.h.

◆ parseExtrabytes()

QVector< QgsLazInfo::ExtraBytesAttributeDetails > QgsLazInfo::parseExtrabytes	(	char *	rawData,
		int	length,
		int	pointRecordLength
	)

static

Static function to parse the raw extrabytes VLR into a list of recognizable extrabyte attributes.

Definition at line 211 of file qgslazinfo.cpp.

◆ parseRawHeader()

void QgsLazInfo::parseRawHeader	(	char *	data,
		uint64_t	length
	)

Parses the raw header data loaded from a LAZ file.

Definition at line 42 of file qgslazinfo.cpp.

◆ parseRawVlrEntries()

void QgsLazInfo::parseRawVlrEntries	(	char *	data,
		uint64_t	length
	)

Parses the variable length records found in the array data of length length.

Definition at line 56 of file qgslazinfo.cpp.

◆ pointCount()

uint64_t QgsLazInfo::pointCount ( ) const

inline

Returns the number of points contained in the LAZ file.

Definition at line 72 of file qgslazinfo.h.

◆ pointFormat()

int QgsLazInfo::pointFormat ( ) const

inline

Returns the point format of the point records contained in the LAZ file.

Definition at line 85 of file qgslazinfo.h.

◆ pointRecordLength()

int QgsLazInfo::pointRecordLength ( ) const

inline

Returns the length of each point record in bytes.

Definition at line 101 of file qgslazinfo.h.

◆ projectId()

QString QgsLazInfo::projectId ( ) const

inline

Returns the project identifier contained in the LAZ file public header block (Optional field)

Definition at line 87 of file qgslazinfo.h.

◆ scale()

QgsVector3D QgsLazInfo::scale ( ) const

inline

Returns the scale of the points coordinates.

Definition at line 77 of file qgslazinfo.h.

◆ softwareId()

QString QgsLazInfo::softwareId ( ) const

inline

Returns the identifier of the software used to generate the LAZ file public header block.

Definition at line 91 of file qgslazinfo.h.

◆ systemId()

QString QgsLazInfo::systemId ( ) const

inline

Returns the system identifier contained in the LAZ file public header block.

Definition at line 89 of file qgslazinfo.h.

◆ toMetadata()

QVariantMap QgsLazInfo::toMetadata ( ) const

Returns a map containing various metadata extracted from the LAZ file.

Definition at line 123 of file qgslazinfo.cpp.

◆ version()

QPair< uint8_t, uint8_t > QgsLazInfo::version ( ) const

inline

Returns the LAZ specification version of the LAZ file.

Definition at line 83 of file qgslazinfo.h.

◆ vlrData()

QByteArray QgsLazInfo::vlrData	(	QString	userId,
		int	recordId
	)

Returns the binary data of the variable length record with the user identifier userId and record identifier recordId.

Definition at line 143 of file qgslazinfo.cpp.

The documentation for this class was generated from the following files:

/build/qgis-3.41.0+git20241214+cea29feecf2+99sid/src/core/pointcloud/qgslazinfo.h
/build/qgis-3.41.0+git20241214+cea29feecf2+99sid/src/core/pointcloud/qgslazinfo.cpp

Classes

Public Member Functions

Static Public Member Functions

Detailed Description

Constructor & Destructor Documentation

◆ QgsLazInfo()

Member Function Documentation

◆ attributes()

◆ creationYearDay()

◆ crs()

◆ error()

◆ evlrCount()

◆ extrabytes()

◆ extrabytesCount()

◆ firstEvlrOffset()

◆ firstPointRecordOffset()

◆ firstVariableLengthRecord()

◆ fromFile()

◆ fromUrl()

◆ header()

◆ isValid()

◆ maxCoords()

◆ minCoords()

◆ offset()

◆ parseExtrabytes()

◆ parseRawHeader()

◆ parseRawVlrEntries()

◆ pointCount()

◆ pointFormat()

◆ pointRecordLength()

◆ projectId()

◆ scale()

◆ softwareId()

◆ systemId()

◆ toMetadata()

◆ version()

◆ vlrData()