GisGrid Class Reference

GisGrid encapsulates a simple grid of values based on GIS data. More...

#include <gisgrid.h>

Public Member Functions
	GisGrid ()
	~GisGrid ()
bool	loadFromFile (const QString &fileName)
	load ESRI style text file More...
int	dataSize () const
	number of data items (rows*cols) More...
int	rows () const
	number of rows More...
int	cols () const
	number of columns More...
QPointF	origin () const
	coordinates of the lower left corner of the grid More...
double	cellSize () const
	size of a cell (meters) More...
double	minValue () const
	minimum data value More...
double	maxValue () const
	maximum data value More...
int	noDataValue () const
	no data value of the grid More...
double	value (const QPointF &p) const
	get grid value at local coordinates (X/Y); returs NODATAValue if out of range X and Y are local coordinates. More...
double	value (const double X, const double Y) const
double	value (const int indexx, const int indexy) const
	get value of grid at index positions More...
double	value (const int Index) const
	get value of grid at index positions More...
Vector3D	coord (const int Index) const
	get coordinates of the center of the cell with 'Index' More...
Vector3D	coord (const int indexx, const int indexy) const
QRectF	rectangle (const int indexx, const int indexy) const
void	clip (const QRectF &box)
	clip the grid to 'Box' (set values outside to -1) More...
QList< double >	distinctValues ()
	returns a list of distinct values More...

Static Public Member Functions
static QPointF	modelToWorld (QPointF model_coordinates)
	convert model to world coordinates (metric) More...
static QPointF	worldToModel (QPointF world_coordinates)
	convert world (i.e. GIS) to model coordinates (metric) (with 0/0 at lower left edge of project area) More...

Detailed Description

GisGrid encapsulates a simple grid of values based on GIS data.

GisGrid can load input files in ESRI text file format (loadFromFile()) and transforms coordinates to the current reference in iLand.

Constructor & Destructor Documentation

GisGrid()

GisGrid::GisGrid

(

)

~GisGrid()

GisGrid::~GisGrid

(

)

Member Function Documentation

cellSize()

double GisGrid::cellSize ( ) const

inline

size of a cell (meters)

clip()

void GisGrid::clip

(

const QRectF &

box

)

clip the grid to 'Box' (set values outside to -1)

cols()

int GisGrid::cols ( ) const

inline

number of columns

coord() [1/2]

Vector3D GisGrid::coord

(

const int

Index

)

const

get coordinates of the center of the cell with 'Index'

coord() [2/2]

Vector3D GisGrid::coord	(	const int	indexx,
		const int	indexy
	)		const

dataSize()

int GisGrid::dataSize ( ) const

inline

number of data items (rows*cols)

distinctValues()

QList< double > GisGrid::distinctValues

(

)

returns a list of distinct values

loadFromFile()

bool GisGrid::loadFromFile

(

const QString &

fileName

)

load ESRI style text file

maxValue()

double GisGrid::maxValue ( ) const

inline

maximum data value

minValue()

double GisGrid::minValue ( ) const

inline

minimum data value

modelToWorld()

QPointF GisGrid::modelToWorld ( QPointF  model_coordinates )

static

convert model to world coordinates (metric)

noDataValue()

int GisGrid::noDataValue ( ) const

inline

no data value of the grid

origin()

QPointF GisGrid::origin ( ) const

inline

coordinates of the lower left corner of the grid

rectangle()

QRectF GisGrid::rectangle	(	const int	indexx,
		const int	indexy
	)		const

rows()

int GisGrid::rows ( ) const

inline

number of rows

value() [1/4]

double GisGrid::value	(	const double	X,
		const double	Y
	)		const

value() [2/4]

double GisGrid::value

(

const int

Index

)

const

get value of grid at index positions

value() [3/4]

double GisGrid::value	(	const int	indexx,
		const int	indexy
	)		const

get value of grid at index positions

value() [4/4]

double GisGrid::value ( const QPointF &  p ) const

inline

get grid value at local coordinates (X/Y); returs NODATAValue if out of range X and Y are local coordinates.

worldToModel()

QPointF GisGrid::worldToModel ( QPointF  world_coordinates )

static

convert world (i.e. GIS) to model coordinates (metric) (with 0/0 at lower left edge of project area)

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

• C:/dev/iland/src/tools/gisgrid.h
• C:/dev/iland/src/tools/gisgrid.cpp