Class NTV2

java.lang.Object

org.locationtech.proj4j.datum.NTV2

public final class NTV2
extends Object

Parser for the "National Transformation" v2 format Very basic implementation: only files with 1 subfile are supported, gridshift type is supposed to be in seconds Header structure:

0        8        16
|NUM_OREC|iiii    |
|NUM_SREC|iiii    |
|NUM_FILE|iiii    |
|GS_TYPE |ssssssss|
|VERSION |ssssssss|
|SYSTEM_F|ssssssss|
|SYSTEM_T|ssssssss|
|MAJOR_F |dddddddd|
|MINOR_F |dddddddd|
|MAJOR_T |dddddddd|
|MINOR_T |dddddddd|

Subfile header:

|SUB_NAME|ssssssss|
|PARENT  |ssssssss|
|CREATED |ssssssss|
|UPDATED |ssssssss|
|S_LAT   |dddddddd|
|N_LAT   |dddddddd|
|E_LONG  |dddddddd|
|W_LONG  |dddddddd|
|LAT_INC |dddddddd|
|LONG_INC|dddddddd|
|GS_COUNT|iiii    |

Grid shift records

|dddd|dddd|dddd|dddd|

End of File record

|END     |dddddddd|

Author:

Bart Hanssens

Constructor Summary

Constructors

Constructor	Description
NTV2()

Method Summary

Modifier and Type	Method	Description
static Grid.ConversionTable	init(DataInputStream instream)	Initialize conversion table
static void	load(DataInputStream instream, Grid grid)	Load grid(sub)file into grid
static boolean	testHeader(byte[] header)	Use header to check file type

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

NTV2

public NTV2()

Method Details

testHeader

public static boolean testHeader(byte[] header)

Use header to check file type

Parameters:

header -

Returns:

true if format is NTv2

init

public static Grid.ConversionTable init(DataInputStream instream)
                                 throws IOException

Initialize conversion table

Parameters:

instream -

Returns:

Throws:

IOException

load

public static void load(DataInputStream instream,
 Grid grid)
                 throws IOException

Load grid(sub)file into grid

Parameters:

instream -

grid -

Throws:

IOException