com.atakmap.android.elev.dt2

Class Dt2ElevationData

java.lang.Object

AbstractElevationData

com.atakmap.android.elev.dt2.Dt2ElevationData

public class Dt2ElevationData
extends AbstractElevationData

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Dt2ElevationData.DtedFormat

Field Summary

Fields

Modifier and Type	Field and Description
static ElevationDataSpi	SPI

Method Summary

Modifier and Type	Method and Description
double	getElevation(double lat, double lng)
void	getElevation(java.util.Iterator<GeoPoint> points, double[] elevations, Hints hints)
static double	interpretSample(short s) Interprets a raw 16-bit DTED sample into a float-point elevation value.

Methods inherited from class java.lang.Object

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

Field Detail

SPI

public static final ElevationDataSpi SPI

Method Detail

getElevation

public double getElevation(double lat,
                           double lng)

getElevation

public void getElevation(java.util.Iterator<GeoPoint> points,
                         double[] elevations,
                         Hints hints)

interpretSample

public static double interpretSample(short s)

Interprets a raw 16-bit DTED sample into a float-point elevation value.

The negative in DTED is NOT two's complement, it's signed-magnitude. Mask off the MSB and multiple by -1 to make it 2's complement.

Parameters:

s - is the value.

Returns:

a double that represents the value correctly interpretting the sign magnitude or Double.NaN in the event that the value is null or invalid per MIL-PRF-89020B