Class Grid

java.lang.Object

org.locationtech.proj4j.datum.Grid

All Implemented Interfaces:

Serializable

public final class Grid
extends Object
implements Serializable

A Grid represents a geodetic datum defining some mapping between a coordinate system referenced to the surface of the earth and spherical coordinates. Generally Grids are loaded from definition files in the proj4 resource directory.

See Also:

• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	Grid.ConversionTable

Field Summary

Fields

Modifier and Type	Field	Description
private Grid	child
private String	fileName	URI for accessing the grid definition file
private String	format	File format of the grid definition file, ie "ctable", "ntv1", "ntv2" or "missing"
private String	gridName	Identifying name for this Grid.
private int	gridOffset
(package private) static final int	MAX_TRY
private Grid	next
(package private) Grid.ConversionTable	table
(package private) static final double	TOL

Constructor Summary

Constructors

Constructor	Description
Grid()

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object that)
static List<Grid>	fromNadGrids(String grids)
private static Grid	gridinfoInit(String gridName)
int	hashCode()
static void	mergeGridFile(String name, List<Grid> gridList)	Merge (append) a named grid into the given gridlist.
private static PolarCoordinate	nad_cvt(PolarCoordinate in, boolean inverse, Grid.ConversionTable table)
private static PolarCoordinate	nad_intr(PolarCoordinate t, Grid.ConversionTable table)
private static DataInputStream	resolveGridDefinition(String gridName)
static void	shift(List<Grid> grids, boolean inverse, ProjCoordinate in)	Convert between this grid and WGS84, or vice versa if the inverse flag is set.
String	toString()

Methods inherited from class Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Details

gridName

private String gridName

Identifying name for this Grid. eg "conus" or ntv2_0.gsb

fileName

private String fileName

URI for accessing the grid definition file

format

private String format

File format of the grid definition file, ie "ctable", "ntv1", "ntv2" or "missing"

gridOffset

private int gridOffset

MAX_TRY

static final int MAX_TRY

See Also:

• Constant Field Values

TOL

static final double TOL

See Also:

• Constant Field Values

table

Grid.ConversionTable table

next

private Grid next

child

private Grid child

Constructor Details

Grid

public Grid()

Method Details

mergeGridFile

public static void mergeGridFile(String name,
 List<Grid> gridList)
                          throws IOException

Merge (append) a named grid into the given gridlist.

Throws:

IOException

shift

public static void shift(List<Grid> grids,
 boolean inverse,
 ProjCoordinate in)

Convert between this grid and WGS84, or vice versa if the inverse flag is set.

nad_cvt

private static PolarCoordinate nad_cvt(PolarCoordinate in,
 boolean inverse,
 Grid.ConversionTable table)

nad_intr

private static PolarCoordinate nad_intr(PolarCoordinate t,
 Grid.ConversionTable table)

fromNadGrids

public static List<Grid> fromNadGrids(String grids)
                               throws IOException

Throws:

IOException

gridinfoInit

private static Grid gridinfoInit(String gridName)
                          throws IOException

Throws:

IOException

resolveGridDefinition

private static DataInputStream resolveGridDefinition(String gridName)
                                              throws IOException

Throws:

IOException

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object that)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object