IlvShapeFileTiler Class Reference

A Shapefile tiler. More...

#include <ilviews/maps/format/shapefile/shptiler.h>

Public Member Functions
	IlvShapeFileTiler (const char *shpFilename, const char *shxFileName, const char *targetFileName, IlDouble tileWidth, IlDouble tileHeight)
	Initializes a new IlvShapeFileTiler from a set of files and tile dimensions. More...
	IlvShapeFileTiler (const char *shpFilename, const char *shxFileName, const char *targetFileName, IlInt numColumns, IlInt numRows)
	Initializes a new IlvShapeFileTiler from a set of files and the number of tiles. More...
void	addInfo ()
	Adds a single object in the spatial index.
void	close ()
	Saves the tiling information, and closes the readers.
IlInt	getColumnCount () const
	Returns the number of columns. More...
IlInt	getCurrentCount () const
	Returns the number of objects currently processed. More...
IlInt	getFeatureCount () const
	Returns the total number of objects to process. More...
IlBoolean	getLowerRightCorner (IlvCoordinate &c) const
	Returns the lower right coordinate of the bounding box that delimits the objects contained in the shape file. More...
const IlvMapFeature *	getNextFeature ()
	Returns the next feature from the shape file. More...
IlvCoordinate *	getOrigin () const
	Returns the origin of the tile grid. More...
IlInt	getRowCount () const
	Returns the number of rows. More...
IlvMapsError	getStatus () const
	Returns the status of this tiler. More...
IlDouble	getTileHeight () const
	Returns the height of a tile in manager coordinates. More...
IlDouble	getTileWidth () const
	Returns the width of a tile in manager coordinates. More...
IlBoolean	getUpperLeftCorner (IlvCoordinate &c) const
	Returns the upper left coordinate of the bounding box that delimits the objects contained in the shape file. More...

Static Public Member Functions
static IlvMapsError	CreateShapeSpatialIndex (const char *shpFilename, const char *targetFileName, IlInt numColumns, IlInt numRows)
	Creates a shape spatial index. More...
static IlvMapsError	CreateShapeSpatialIndex (const char *shpFilename, const char *targetFileName, IlDouble tileWidth, IlDouble tileHeight)
	Creates a shape spatial index. More...

Protected Member Functions
void	setStatus (IlvMapsError status)
	Sets the error status of the tiler. More...

Detailed Description

A Shapefile tiler.

Library: ilvmaps
An IlvShapeFileTiler is used to generate and to save tile information for a given Shapefile.

There are two ways to use this class: A direct way, tile information is written in one call:

IlvShapeFileTiler::CreateShapeSpatialIndex(sourceFileName,
                                           targetFileName,
                                           tileWidth,
                                           tileHeight);

or a step by step way, allowing to update a progress bar,

IlvShapeFileTiler* tiler = new IlvShapeFileTiler(sourceFileName,
                                                 shxFileName,
                                                 targetFileName,
                                                 tileWidth,
                                                 tileHeight);
while (tiler->getNextFeature()) {
    updateProgressBar();
    tiler->addInfo();
}
tiler->close();

Constructor & Destructor Documentation

IlvShapeFileTiler() [1/2]

IlvShapeFileTiler::IlvShapeFileTiler	(	const char *	shpFilename,
		const char *	shxFileName,
		const char *	targetFileName,
		IlDouble	tileWidth,
		IlDouble	tileHeight
	)

Initializes a new IlvShapeFileTiler from a set of files and tile dimensions.

Parameters

shpFilename	The source shape file name.
shxFileName	The name of the .shx file, or 0 if no progress information is needed.
targetFileName	The target spatial index file name.
tileWidth	The width of one tile, in manager coordinates.
tileHeight	The height of one tile, in manager coordinates.

IlvShapeFileTiler() [2/2]

IlvShapeFileTiler::IlvShapeFileTiler	(	const char *	shpFilename,
		const char *	shxFileName,
		const char *	targetFileName,
		IlInt	numColumns,
		IlInt	numRows
	)

Initializes a new IlvShapeFileTiler from a set of files and the number of tiles.

Parameters

shpFilename	The source shape file name.
shxFileName	The name of the .shx file, or null if no progress information is needed.
targetFileName	The target spatial index file name.
numColumns	The number of columns.
numRows	The number of rows.

Member Function Documentation

CreateShapeSpatialIndex() [1/2]

static IlvMapsError IlvShapeFileTiler::CreateShapeSpatialIndex ( const char *  shpFilename, const char *  targetFileName, IlInt  numColumns, IlInt  numRows  )

static

Creates a shape spatial index.

Parameters

shpFilename	The source shape file name.
targetFileName	The target spatial index file name.
numColumns	The number of columns.
numRows	The number of rows.

CreateShapeSpatialIndex() [2/2]

static IlvMapsError IlvShapeFileTiler::CreateShapeSpatialIndex ( const char *  shpFilename, const char *  targetFileName, IlDouble  tileWidth, IlDouble  tileHeight  )

static

Creates a shape spatial index.

Parameters

shpFilename	The source shape file name.
targetFileName	The target spatial index file name.
tileWidth	The width of the tiles.
tileHeight	The height of the tiles.

getColumnCount()

IlInt IlvShapeFileTiler::getColumnCount

(

)

const

Returns the number of columns.

Returns

The number of columns.

getCurrentCount()

IlInt IlvShapeFileTiler::getCurrentCount

(

)

const

Returns the number of objects currently processed.

Returns

The number of objects currently processed.

getFeatureCount()

IlInt IlvShapeFileTiler::getFeatureCount

(

)

const

Returns the total number of objects to process.

Returns

The total number of objects to process, or 0 if the index file could not be opened or if the tiler was constructed with no .shx file.

getLowerRightCorner()

IlBoolean IlvShapeFileTiler::getLowerRightCorner

(

IlvCoordinate &

c

)

const

Returns the lower right coordinate of the bounding box that delimits the objects contained in the shape file.

Parameters

c	Set to the lower right coordinate of the bounding box that delimits the objects contained in the shape file on return.

Returns

IlFalse if the lower right corner is unknown.

getNextFeature()

const IlvMapFeature* IlvShapeFileTiler::getNextFeature

(

)

Returns the next feature from the shape file.

Returns

The next IlvMapFeature or 0 if there is none.

getOrigin()

IlvCoordinate* IlvShapeFileTiler::getOrigin

(

)

const

Returns the origin of the tile grid.

Returns

The origin of the tile grid.

getRowCount()

IlInt IlvShapeFileTiler::getRowCount

(

)

const

Returns the number of rows.

Returns

The number of rows.

getStatus()

IlvMapsError IlvShapeFileTiler::getStatus

(

)

const

Returns the status of this tiler.

Returns

IlvMaps::NoError() if no error occurred, an error code otherwise.

getTileHeight()

IlDouble IlvShapeFileTiler::getTileHeight

(

)

const

Returns the height of a tile in manager coordinates.

Returns

The height of a tile in manager coordinates.

getTileWidth()

IlDouble IlvShapeFileTiler::getTileWidth

(

)

const

Returns the width of a tile in manager coordinates.

Returns

The width of a tile in manager coordinates.

getUpperLeftCorner()

IlBoolean IlvShapeFileTiler::getUpperLeftCorner

(

IlvCoordinate &

c

)

const

Returns the upper left coordinate of the bounding box that delimits the objects contained in the shape file.

Parameters

c	Set to the upper left coordinate of the bounding box that delimits the objects contained in the shape file on return.

Returns

IlFalse if the upper left corner is unknown.

setStatus()

void IlvShapeFileTiler::setStatus ( IlvMapsError  status )

protected

Sets the error status of the tiler.

Parameters

status

The error code.