no.kartverket.geodesy

Class Href_grid

java.lang.Object

no.kartverket.geodesy.Href_grid

public class Href_grid
extends java.lang.Object

Created by hg on 18.08.2017.

Field Summary

Fields

Modifier and Type	Field and Description
private float[]	_afVals
private double	_ddE
private double	_ddN
private double	_dEMax
private double	_dEMin
private double	_dNMax
private double	_dNMin
private int	_nCols
private int	_nOk
private int	_nRows
private int	_nVals
private static int	BLOCK_SIZE
private static double	dDUMMY
(package private) static java.lang.String	href_file
private static float	NO_VAL

Constructor Summary

Constructors

Constructor and Description
Href_grid()

Method Summary

Modifier and Type	Method and Description
private double	E2Index(double E)
private float	GetTabVal(int nN, int nE)
double	GetVal(double N, double E) Get one geoid height from position (N,E).
private boolean	IsDummy(float fLL, float fLR, float fUL, float fUR, double NFrac, double EFrac)
private double	N2Index(double N)
private boolean	ReadData(byte[] data) Parse data from byte buffer and save to float array
private double	ReadDouble(int index, byte[] data)
private float	ReadFloat(int index, byte[] data)
private boolean	ReadHeader(byte[] data) Parse header
boolean	ReadHrefFile(android.content.res.AssetManager assetManager) Read href file to byte buffer and parse header and data
private int	ReadInt(int index, byte[] data)
private boolean	SaveVal(int nN, int nE, float fVal)
private boolean	SetData(byte[] data) Parse header and data from byte buffer
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

href_file

static final java.lang.String href_file

See Also:

Constant Field Values

dDUMMY

private static double dDUMMY

NO_VAL

private static float NO_VAL

BLOCK_SIZE

private static int BLOCK_SIZE

_dNMin

private double _dNMin

_dEMin

private double _dEMin

_dNMax

private double _dNMax

_dEMax

private double _dEMax

_ddN

private double _ddN

_ddE

private double _ddE

_nRows

private int _nRows

_nCols

private int _nCols

_nVals

private int _nVals

_nOk

private int _nOk

_afVals

private float[] _afVals

Constructor Detail

Href_grid

public Href_grid()

Method Detail

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

SetData

private boolean SetData(byte[] data)

Parse header and data from byte buffer

Parameters:

data -

Returns:

ReadInt

private int ReadInt(int index,
                    byte[] data)

ReadDouble

private double ReadDouble(int index,
                          byte[] data)

ReadFloat

private float ReadFloat(int index,
                        byte[] data)

ReadHeader

private boolean ReadHeader(byte[] data)

Parse header

Parameters:

data -

Returns:

SaveVal

private boolean SaveVal(int nN,
                        int nE,
                        float fVal)

ReadData

private boolean ReadData(byte[] data)

Parse data from byte buffer and save to float array

Parameters:

data -

Returns:

N2Index

private double N2Index(double N)

E2Index

private double E2Index(double E)

GetTabVal

private float GetTabVal(int nN,
                        int nE)

IsDummy

private boolean IsDummy(float fLL,
                        float fLR,
                        float fUL,
                        float fUR,
                        double NFrac,
                        double EFrac)

GetVal

public double GetVal(double N,
                     double E)

Get one geoid height from position (N,E). Read 4 values from float array and do bilinear interpolation.

Parameters:

N -

E -

Returns:

Geoid height

ReadHrefFile

public boolean ReadHrefFile(android.content.res.AssetManager assetManager)

Read href file to byte buffer and parse header and data

Parameters:

assetManager -

Returns: