QgsTerrainDownloader Class Reference

3 Takes care of downloading terrain data from a publicly available data source. More...

#include <qgsterraindownloader.h>

Classes
struct	DataSource
	Definition of data source for terrain tiles (assuming "terrarium" data encoding with usual XYZ tiling scheme) More...

Public Member Functions
	QgsTerrainDownloader (const QgsCoordinateTransformContext &transformContext)
	Constructs a QgsTerrainDownloader object. More...
	~QgsTerrainDownloader ()
DataSource	dataSource () const
	Returns currently configured data source. More...
QByteArray	getHeightMap (const QgsRectangle &extentOrig, int res, const QgsCoordinateReferenceSystem &destCrs, const QgsCoordinateTransformContext &context=QgsCoordinateTransformContext(), QString tmpFilenameImg=QString(), QString tmpFilenameTif=QString())
	For given extent and resolution (number of pixels for width/height) in specified CRS, download necessary tile images (if not cached already) and produce height map out of them (byte array of res*res float values) More...
void	setDataSource (const DataSource &ds)
	Configures data source to be used for download of terrain tiles. More...

Static Public Member Functions
static DataSource	defaultDataSource ()
	Returns the data source used by default. More...

Detailed Description

3 Takes care of downloading terrain data from a publicly available data source.

Currently using terrain tiles in Terrarium format hosted on AWS. More info:

• data format: https://github.com/tilezen/joerd/blob/master/docs/formats.md
• data sources: https://github.com/tilezen/joerd/blob/master/docs/data-sources.md
• hosting: https://registry.opendata.aws/terrain-tiles/

Since

QGIS 3.8

Definition at line 43 of file qgsterraindownloader.h.

Constructor & Destructor Documentation

QgsTerrainDownloader()

QgsTerrainDownloader::QgsTerrainDownloader

(

const QgsCoordinateTransformContext &

transformContext

)

Constructs a QgsTerrainDownloader object.

Parameters

transformContext

coordinate transform context

Definition at line 24 of file qgsterraindownloader.cpp.

~QgsTerrainDownloader()

QgsTerrainDownloader::~QgsTerrainDownloader ( )

default

Member Function Documentation

dataSource()

DataSource QgsTerrainDownloader::dataSource ( ) const

inline

Returns currently configured data source.

Definition at line 71 of file qgsterraindownloader.h.

defaultDataSource()

QgsTerrainDownloader::DataSource QgsTerrainDownloader::defaultDataSource ( )

static

Returns the data source used by default.

Definition at line 41 of file qgsterraindownloader.cpp.

getHeightMap()

QByteArray QgsTerrainDownloader::getHeightMap	(	const QgsRectangle &	extentOrig,
		int	res,
		const QgsCoordinateReferenceSystem &	destCrs,
		const QgsCoordinateTransformContext &	context = QgsCoordinateTransformContext(),
		QString	tmpFilenameImg = QString(),
		QString	tmpFilenameTif = QString()
	)

For given extent and resolution (number of pixels for width/height) in specified CRS, download necessary tile images (if not cached already) and produce height map out of them (byte array of res*res float values)

Definition at line 119 of file qgsterraindownloader.cpp.

setDataSource()

void QgsTerrainDownloader::setDataSource

(

const DataSource &

ds

)

Configures data source to be used for download of terrain tiles.

Definition at line 56 of file qgsterraindownloader.cpp.

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

• /build/qgis-3.12.1+28bionic/src/3d/terrain/qgsterraindownloader.h
• /build/qgis-3.12.1+28bionic/src/3d/terrain/qgsterraindownloader.cpp