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IlvCADRGCoverage Class Reference

Stores information about a CADRG coverage as described in a CADRG table of contents. More...

#include <ilviews/maps/format/cadrg/cadrgutil.h>

Public Member Functions

IlInt getColumns () const
 Returns the number of frame columns in the coverage. More...
 
const IlvCADRGFramegetFrame (IlShort row, IlShort column) const
 Returns the frame of the specified row and column. More...
 
IlDouble getFrameHeight () const
 Returns the height of a frame of the coverage in the file projection system. More...
 
IlDouble getFrameWidth () const
 Returns the width of a frame of the coverage in the file projection system. More...
 
IlDouble getHorizontalInterval () const
 Returns the longitude interval between two adjacent pixels of the image. More...
 
IlInt getIndex () const
 Returns the index of the coverage. More...
 
IlBoolean getLowerRightCorner (IlvCoordinate &lr) const
 Queries the lower-right corner of the coverage region in the coverage projection. More...
 
IlvProjectiongetProjection () const
 Returns the projection used for the coverage. More...
 
IlInt getRows () const
 Returns the number of frame rows in the coverage. More...
 
IlBoolean getUpperLeftCorner (IlvCoordinate &ul) const
 Queries the upper-left corner of the coverage region in the coverage projection. More...
 
IlDouble getVerticalInterval () const
 Returns the latitude interval between two adjacent pixels of the image. More...
 

Detailed Description

Stores information about a CADRG coverage as described in a CADRG table of contents.

Library: ilvmaps

A coverage corresponds physically to a directory in a CADRG distribution. It is composed of a set of frames that are part of the same map.

Most of the coverages are georeferenced, except for those used to store the overview of a CADRG product or the map legends.

Instances of the class IlvCADRGCoverage are obtained using an IlvCADRGTocReader.

Member Function Documentation

§ getColumns()

IlInt IlvCADRGCoverage::getColumns ( ) const

Returns the number of frame columns in the coverage.

Returns
The number of frame columns in the coverage.

§ getFrame()

const IlvCADRGFrame* IlvCADRGCoverage::getFrame ( IlShort  row,
IlShort  column 
) const

Returns the frame of the specified row and column.

Warning
The row and column parameters should not exceed the coverage size.
Parameters
rowThe row of the frame.
columnThe column of the frame.
Returns
0 if the specified cell is empty. Otherwise, it returns an IlvCADRGFrame that should not be modified nor deleted. The returned object is deleted by the destructor of the IlvCADRGCoverage.
See also
getRows(), getColumns().

§ getFrameHeight()

IlDouble IlvCADRGCoverage::getFrameHeight ( ) const

Returns the height of a frame of the coverage in the file projection system.

Returns
The height of a frame of the coverage in the file projection system.

§ getFrameWidth()

IlDouble IlvCADRGCoverage::getFrameWidth ( ) const

Returns the width of a frame of the coverage in the file projection system.

Returns
The width of a frame of the coverage in the file projection system.

§ getHorizontalInterval()

IlDouble IlvCADRGCoverage::getHorizontalInterval ( ) const

Returns the longitude interval between two adjacent pixels of the image.

Returns
The longitude interval, in degrees, between two adjacent pixels of the image.

§ getIndex()

IlInt IlvCADRGCoverage::getIndex ( ) const

Returns the index of the coverage.

Returns
The index of the coverage.

§ getLowerRightCorner()

IlBoolean IlvCADRGCoverage::getLowerRightCorner ( IlvCoordinate lr) const

Queries the lower-right corner of the coverage region in the coverage projection.

Parameters
lrSet on return to the coordinates of the lower-right corner of the coverage region into this argument.
Returns
IlTrue if the coverage is georeferenced. Otherwise, it returns IlFalse, and the value of ul should not be used. This occurs in the case of legend coverages or of overview coverages.

§ getProjection()

IlvProjection* IlvCADRGCoverage::getProjection ( ) const

Returns the projection used for the coverage.

The projection is either a geographic projection for non polar areas, or an azimuthal equidistant projection for polar areas.

Returns
0 if the coverage is not georeferenced, or shared IlvProjection that should not be deleted, but that can be locked (and then unlocked when it is not used anymore).

§ getRows()

IlInt IlvCADRGCoverage::getRows ( ) const

Returns the number of frame rows in the coverage.

Returns
The number of frame rows in the coverage.

§ getUpperLeftCorner()

IlBoolean IlvCADRGCoverage::getUpperLeftCorner ( IlvCoordinate ul) const

Queries the upper-left corner of the coverage region in the coverage projection.

Parameters
ulSet on return to the coordinates of the upper-left corner of the coverage region into this argument.
Returns
IlTrue if the coverage is georeferenced. Otherwise, it returns IlFalse, and the value of ul should not be used. This occurs in the case of legend coverages or of overview coverages.

§ getVerticalInterval()

IlDouble IlvCADRGCoverage::getVerticalInterval ( ) const

Returns the latitude interval between two adjacent pixels of the image.

Returns
The latitude interval, in degrees, between two adjacent pixels of the image.

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