org.opentripplanner.common.geometry

Interface ZSampleGrid<TZ>

All Superinterfaces:

Iterable<ZSampleGrid.ZSamplePoint<TZ>>

All Known Implementing Classes:

SparseMatrixZSampleGrid

public interface ZSampleGrid<TZ>
extends Iterable<ZSampleGrid.ZSamplePoint<TZ>>

A generic indexed grid of TZ samples. TZ could be anything but is usually a vector of parameters. We assume some sort of equirectangular project between the index coordinates (x,y) and the geographic coordinates (lat, lon). The projection factor (cos phi, standard parallel) is given as a cell size in lat,lon degrees (dLat,dLon)). The conversion is given by the following formulae: lon = lon0 + x.dLon; lat = lat0 + y.dLat; (lat0,lon0) is the center, (dLat,dLon) is the cell size.

Author:

laurent

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	ZSampleGrid.ZSamplePoint<TZ>

Method Summary

Modifier and Type	Method and Description
DelaunayTriangulation<TZ>	delaunayTriangulate() TODO The mapping between a ZSampleGrid and a DelaunayTriangulation should not be part of an interface but extracted to a converter.
com.vividsolutions.jts.geom.Coordinate	getCellSize()
com.vividsolutions.jts.geom.Coordinate	getCenter()
com.vividsolutions.jts.geom.Coordinate	getCoordinates(ZSampleGrid.ZSamplePoint<TZ> point)
int[]	getLowerLeftIndex(com.vividsolutions.jts.geom.Coordinate C)
ZSampleGrid.ZSamplePoint<TZ>	getOrCreate(int x, int y)
int	getXMax()
int	getXMin()
int	getYMax()
int	getYMin()
int	size()

Methods inherited from interface java.lang.Iterable

forEach, iterator, spliterator

Method Detail

getOrCreate

ZSampleGrid.ZSamplePoint<TZ> getOrCreate(int x,
                                         int y)

Parameters:

x -

y -

Returns:

The sample point located at (x,y). Create a new one if not existing.

getCoordinates

com.vividsolutions.jts.geom.Coordinate getCoordinates(ZSampleGrid.ZSamplePoint<TZ> point)

Parameters:

point - The sample point

Returns:

The (lat,lon) coordinates of this sample point.

getLowerLeftIndex

int[] getLowerLeftIndex(com.vividsolutions.jts.geom.Coordinate C)

Parameters:

C - The geographical coordinate

Returns:

The (x,y) index of the lower-left index of the cell enclosing the point.

getCenter

com.vividsolutions.jts.geom.Coordinate getCenter()

Returns:

The base coordinate center (lat0,lon0)

getCellSize

com.vividsolutions.jts.geom.Coordinate getCellSize()

Returns:

The cell size (dLat,dLon)

getXMin

int getXMin()

getXMax

int getXMax()

getYMin

int getYMin()

getYMax

int getYMax()

size

int size()

delaunayTriangulate

DelaunayTriangulation<TZ> delaunayTriangulate()

TODO The mapping between a ZSampleGrid and a DelaunayTriangulation should not be part of an interface but extracted to a converter. This assume that the conversion process does not rely on the inner working of the ZSampleGrid implementation, which should be the case.

Returns:

This ZSampleGrid converted as a DelaunayTriangulation.