QgsVectorTileUtils Class Reference

Random utility functions for working with vector tiles. More...

#include <qgsvectortileutils.h>

Static Public Member Functions
static bool	checkXYZUrlTemplate (const QString &url)
	Checks whether the URL template string is correct (contains {x}, {y} / {-y}, {z} placeholders)
static QString	formatXYZUrlTemplate (const QString &url, QgsTileXYZ tile, const QgsTileMatrix &tileMatrix)
	Returns formatted tile URL string replacing {x}, {y}, {z} placeholders (or {-y} instead of {y} for TMS convention)
static void	loadSprites (const QVariantMap &styleDefinition, QgsMapBoxGlStyleConversionContext &context, const QString &styleUrl=QString())
	Downloads the sprite image and sets it to the conversion context.
static QgsFields	makeQgisFields (const QSet< QString > &flds)
	Returns QgsFields instance based on the set of field names.
static QgsVectorLayer *	makeVectorLayerForTile (QgsVectorTileLayer *mvt, QgsTileXYZ tileID, const QString &layerName)
	Returns a temporary vector layer for given sub-layer of tile in vector tile layer.
static double	scaleToZoom (double mapScale, double z0Scale=559082264.0287178)
	Finds zoom level given map scale denominator.
static int	scaleToZoomLevel (double mapScale, int sourceMinZoom, int sourceMaxZoom, double z0Scale=559082264.0287178)
	Finds the best fitting zoom level given a map scale denominator and allowed zoom level range.
static void	sortTilesByDistanceFromCenter (QVector< QgsTileXYZ > &tiles, QPointF center)
	Orders tile requests according to the distance from view center (given in tile matrix coords)
static QPolygon	tilePolygon (QgsTileXYZ id, const QgsCoordinateTransform &ct, const QgsTileMatrix &tm, const QgsMapToPixel &mtp)
	Returns polygon (made by four corners of the tile) in screen coordinates.

Detailed Description

Random utility functions for working with vector tiles.

Since

QGIS 3.14

Definition at line 47 of file qgsvectortileutils.h.

Member Function Documentation

checkXYZUrlTemplate()

bool QgsVectorTileUtils::checkXYZUrlTemplate ( const QString &  url )

static

Checks whether the URL template string is correct (contains {x}, {y} / {-y}, {z} placeholders)

Definition at line 146 of file qgsvectortileutils.cpp.

formatXYZUrlTemplate()

QString QgsVectorTileUtils::formatXYZUrlTemplate ( const QString &  url, QgsTileXYZ  tile, const QgsTileMatrix &  tileMatrix  )

static

Returns formatted tile URL string replacing {x}, {y}, {z} placeholders (or {-y} instead of {y} for TMS convention)

Definition at line 129 of file qgsvectortileutils.cpp.

loadSprites()

void QgsVectorTileUtils::loadSprites ( const QVariantMap &  styleDefinition, QgsMapBoxGlStyleConversionContext &  context, const QString &  styleUrl = QString()  )

static

Downloads the sprite image and sets it to the conversion context.

Parameters

styleDefinition	the style definition map
context	the style conversion context
styleUrl	optional the style url

Definition at line 175 of file qgsvectortileutils.cpp.

makeQgisFields()

QgsFields QgsVectorTileUtils::makeQgisFields ( const QSet< QString > &  flds )

static

Returns QgsFields instance based on the set of field names.

Definition at line 55 of file qgsvectortileutils.cpp.

makeVectorLayerForTile()

QgsVectorLayer * QgsVectorTileUtils::makeVectorLayerForTile ( QgsVectorTileLayer *  mvt, QgsTileXYZ  tileID, const QString &  layerName  )

static

Returns a temporary vector layer for given sub-layer of tile in vector tile layer.

Definition at line 87 of file qgsvectortileutils.cpp.

scaleToZoom()

double QgsVectorTileUtils::scaleToZoom ( double  mapScale, double  z0Scale = 559082264.0287178  )

static

Finds zoom level given map scale denominator.

The z0Scale argument gives the scale denominator at zoom level 0, where the default value corresponds to GoogleCRS84Quad tile matrix set

Since

QGIS 3.16

Definition at line 67 of file qgsvectortileutils.cpp.

scaleToZoomLevel()

int QgsVectorTileUtils::scaleToZoomLevel ( double  mapScale, int  sourceMinZoom, int  sourceMaxZoom, double  z0Scale = 559082264.0287178  )

static

Finds the best fitting zoom level given a map scale denominator and allowed zoom level range.

The z0Scale argument gives the scale denominator at zoom level 0, where the default value corresponds to GoogleCRS84Quad tile matrix set.

Definition at line 75 of file qgsvectortileutils.cpp.

sortTilesByDistanceFromCenter()

void QgsVectorTileUtils::sortTilesByDistanceFromCenter ( QVector< QgsTileXYZ > &  tiles, QPointF  center  )

static

Orders tile requests according to the distance from view center (given in tile matrix coords)

Definition at line 168 of file qgsvectortileutils.cpp.

tilePolygon()

QPolygon QgsVectorTileUtils::tilePolygon ( QgsTileXYZ  id, const QgsCoordinateTransform &  ct, const QgsTileMatrix &  tm, const QgsMapToPixel &  mtp  )

static

Returns polygon (made by four corners of the tile) in screen coordinates.

Exceptions

QgsCsException

Definition at line 40 of file qgsvectortileutils.cpp.

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

• /build/qgis-3.34.0+99sid/src/core/vectortile/qgsvectortileutils.h
• /build/qgis-3.34.0+99sid/src/core/vectortile/qgsvectortileutils.cpp