Marble::GeoSceneMercatorTileProjection Class Reference

#include <GeoSceneMercatorTileProjection.h>

Inheritance diagram for Marble::GeoSceneMercatorTileProjection:

Public Member Functions
	GeoSceneMercatorTileProjection ()
GeoDataLatLonBox	geoCoordinates (const TileId &tileId) const
GeoDataLatLonBox	geoCoordinates (int zoomLevel, int x, int y) const override
virtual GeoDataLatLonBox	geoCoordinates (int zoomLevel, int x, int y) const=0
QRect	tileIndexes (const GeoDataLatLonBox &latLonBox, int zoomLevel) const override
GeoSceneAbstractTileProjection::Type	type () const override
Public Member Functions inherited from Marble::GeoSceneAbstractTileProjection
	GeoSceneAbstractTileProjection ()
GeoDataLatLonBox	geoCoordinates (const TileId &tileId) const
int	levelZeroColumns () const
int	levelZeroRows () const
void	setLevelZeroColumns (int levelZeroColumns)
void	setLevelZeroRows (int levelZeroRows)

Additional Inherited Members
Public Types inherited from Marble::GeoSceneAbstractTileProjection
enum	Type { Equirectangular , Mercator }

Detailed Description

Converts the x and y indices of tiles to and from geo coordinates.

For tiles of maps in Mercator projection.

Tiles do have the same width and the same height per zoomlevel. The number of tiles per dimension is twice that of the previous lower zoomlevel. The indexing is done in x dimension eastwards, with the first tiles beginning at -180 degree and an x value of 0 and the last tiles ending at +180 degree, in y dimension southwards with the first tiles beginning at +85.05113 degree and a y value of 0 and the last tiles ending at -85.05113 degree.

NOTE: The method tileIndexes() handles any latitude value >= +85.0 degree as exactly +85.0 degree and any latitude value <= -85.0 as exactly -85.0 degree. So for higher zoomlevels the outermost tiles will be masked by that and not included in any results.

Definition at line 30 of file GeoSceneMercatorTileProjection.h.

Constructor & Destructor Documentation

GeoSceneMercatorTileProjection()

Marble::GeoSceneMercatorTileProjection::GeoSceneMercatorTileProjection

(

)

Construct a new GeoSceneMercatorTileProjection.

Definition at line 16 of file GeoSceneMercatorTileProjection.cpp.

~GeoSceneMercatorTileProjection()

Marble::GeoSceneMercatorTileProjection::~GeoSceneMercatorTileProjection ( )

override

Definition at line 21 of file GeoSceneMercatorTileProjection.cpp.

Member Function Documentation

geoCoordinates() [1/3]

GeoDataLatLonBox Marble::GeoSceneAbstractTileProjection::geoCoordinates

(

const TileId &

tileId

)

const

Get the boundary geo coordinates corresponding to a tile.

If tildId has values out-of-bounds, the behaviour is undefined.

Parameters

tileId

the id of the tile

Returns

geographic bounding box covered by the given tile

Definition at line 101 of file GeoSceneAbstractTileProjection.cpp.

geoCoordinates() [2/3]

GeoDataLatLonBox Marble::GeoSceneMercatorTileProjection::geoCoordinates ( int zoomLevel, int x, int y ) const

overridevirtual

Implements Marble::GeoSceneAbstractTileProjection.

Definition at line 140 of file GeoSceneMercatorTileProjection.cpp.

geoCoordinates() [3/3]

virtual GeoDataLatLonBox Marble::GeoSceneAbstractTileProjection::geoCoordinates ( int zoomLevel, int x, int y ) const

virtual

Get the boundary geo coordinates corresponding to a tile.

If x, y or zoomLevel have values out-of-bounds, the behaviour is undefined.

Parameters

zoomLevel	the zoomlevel of the tile
x	the x index of the tile
y	the y index of the tile

Returns

geographic bounding box covered by the given tile

Implements Marble::GeoSceneAbstractTileProjection.

tileIndexes()

QRect Marble::GeoSceneMercatorTileProjection::tileIndexes ( const GeoDataLatLonBox & latLonBox, int zoomLevel ) const

overridevirtual

Implements Marble::GeoSceneAbstractTileProjection.

Definition at line 124 of file GeoSceneMercatorTileProjection.cpp.

type()

GeoSceneAbstractTileProjection::Type Marble::GeoSceneMercatorTileProjection::type ( ) const

overridevirtual

Implements Marble::GeoSceneAbstractTileProjection.

Definition at line 25 of file GeoSceneMercatorTileProjection.cpp.

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

• GeoSceneMercatorTileProjection.h
• GeoSceneMercatorTileProjection.cpp