visad.bom
Class Radar2DCoordinateSystem

java.lang.Object
  visad.CoordinateSystem
      visad.georef.NavigatedCoordinateSystem
          visad.bom.Radar2DCoordinateSystem

All Implemented Interfaces:

Serializable

public class Radar2DCoordinateSystem
extends NavigatedCoordinateSystem

Radar2DCoordinateSystem is the VisAD CoordinateSystem class for radar (range, azimuth) with an Earth (Latitude, Longitude) Reference, and with azimuth in degrees and range in meters.

See Also:

Serialized Form

Constructor Summary

Radar2DCoordinateSystem(float clat, float clon)
construct a CoordinateSystem for (range, azimuth) relative to an Earth (Latitude, Longitude) Reference; this constructor supplies units = {CommonUnit.meter, CommonUnit.degree} to the super constructor, in order to ensure Unit compatibility with its use of trigonometric functions.

Radar2DCoordinateSystem(float clat, float clon, float radl, float radr, float azl, float azr)
construct a CoordinateSystem for (range, azimuth) relative to an Earth (Latitude, Longitude) Reference; this constructor supplies units = {CommonUnit.meter, CommonUnit.degree} to the super constructor, in order to ensure Unit compatibility with its use of trigonometric functions.

Radar2DCoordinateSystem(RealTupleType reference, float clat, float clon, float radl, float radr, float azl, float azr)
construct a CoordinateSystem for (range, azimuth) relative to an Earth (Latitude, Longitude) Reference; this constructor supplies units = {CommonUnit.meter, CommonUnit.degree} to the super constructor, in order to ensure Unit compatibility with its use of trigonometric functions.

Method Summary

boolean	equals(Object cs) Check to see if this is a Radar2DCoordinateSystem
double[][]	fromReference(double[][] tuples) Convert from latitude/longitude to range/azimuth.
float[][]	fromReference(float[][] tuples) Convert from latitude/longitude to range/azimuth.
float[]	getAzimuthParameters() Return the azimuth parameters
float[]	getCenterPoint() Get center point in lat/lon
float[]	getRangeParameters() Return the range parameters
double[][]	toReference(double[][] tuples) Convert from range/azimuth to latitude/longitude.
float[][]	toReference(float[][] tuples) Convert from range/azimuth to latitude/longitude.
String	toString() Return String representation of this Radar2DCoordinateSystem

Methods inherited from class visad.georef.NavigatedCoordinateSystem

getLatitudeIndex, getLongitudeIndex

Methods inherited from class visad.CoordinateSystem

canConvert, fromReference, fromReference, getCoordinateSystemUnits, getDimension, getReference, getReferenceUnits, toReference, toReference, transformCoordinates, transformCoordinates, transformCoordinates, transformCoordinates, transformCoordinatesFreeUnits, transformCoordinatesFreeUnits

Methods inherited from class java.lang.Object

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

Constructor Detail

Radar2DCoordinateSystem

public Radar2DCoordinateSystem(float clat,
                               float clon)
                        throws VisADException

construct a CoordinateSystem for (range, azimuth) relative to an Earth (Latitude, Longitude) Reference; this constructor supplies units = {CommonUnit.meter, CommonUnit.degree} to the super constructor, in order to ensure Unit compatibility with its use of trigonometric functions. Values of range and azimuth are in terms of absolute values of range and azimuth away from the center point where range is in meters and azimuth = 0 at north.

Parameters:

clat - latitude of center point

clon - longitude of center point

Throws:

VisADException - necessary VisAD object couldn't be created.

Radar2DCoordinateSystem

public Radar2DCoordinateSystem(float clat,
                               float clon,
                               float radl,
                               float radr,
                               float azl,
                               float azr)
                        throws VisADException

construct a CoordinateSystem for (range, azimuth) relative to an Earth (Latitude, Longitude) Reference; this constructor supplies units = {CommonUnit.meter, CommonUnit.degree} to the super constructor, in order to ensure Unit compatibility with its use of trigonometric functions. Values of range and azimuth are in terms of multiples of range and azimuth resolutions away from the low value (radl, azl). The absolute range is (radl + range_value * radr) and the absolute azimuth is (azl + azimuth_value * azr) with azimuth = 0 at north. This allows the use of Integer2DSets for the values assuming linear spacing of range and azimuth.

Parameters:

clat - latitude of center point

clon - longitude of center point

radl - distance from center point for first possible echo (meters)

radr - distance between subsequent radials (meters)

azl - starting azimuth (degrees)

azr - resolution of degrees between azimuths.

Throws:

VisADException - necessary VisAD object couldn't be created.

Radar2DCoordinateSystem

public Radar2DCoordinateSystem(RealTupleType reference,
                               float clat,
                               float clon,
                               float radl,
                               float radr,
                               float azl,
                               float azr)
                        throws VisADException

construct a CoordinateSystem for (range, azimuth) relative to an Earth (Latitude, Longitude) Reference; this constructor supplies units = {CommonUnit.meter, CommonUnit.degree} to the super constructor, in order to ensure Unit compatibility with its use of trigonometric functions. Values of range and azimuth are in terms of multiples of range and azimuth resolutions away from the low value (radl, azl). The absolute range is (radl + range_value * radr) and the absolute azimuth is (azl + azimuth_value * azr) with azimuth = 0 at north. This allows the use of Integer2DSets for the values assuming linear spacing of range and azimuth.

Parameters:

reference - reference RealTupleType (should be RealTupleType.LatitudeLongitudeTuple)

clat - latitude of center point

clon - longitude of center point

radl - distance from center point for first possible echo (meters)

radr - distance between subsequent radials (meters)

azl - starting azimuth (degrees)

azr - resolution of degrees between azimuths.

Throws:

VisADException - necessary VisAD object couldn't be created.

Method Detail

toReference

public double[][] toReference(double[][] tuples)
                       throws VisADException

Convert from range/azimuth to latitude/longitude. Values input are in terms of multiples of the value resolution from the low value (ex: low + value * resolution).

Specified by:

toReference in class CoordinateSystem

Parameters:

tuples - range/azimuth values

Returns:

lat/lon values

Throws:

VisADException - tuples is null or wrong dimension

fromReference

public double[][] fromReference(double[][] tuples)
                         throws VisADException

Convert from latitude/longitude to range/azimuth. Returned values are in terms of multiples of the value resolution from the low value (ex: low + value * resolution).

Specified by:

fromReference in class CoordinateSystem

Parameters:

tuples - lat/lon values

Returns:

range/azimuth values

Throws:

VisADException - tuples is null or wrong dimension

toReference

public float[][] toReference(float[][] tuples)
                      throws VisADException

Convert from range/azimuth to latitude/longitude. Values input are in terms of multiples of the value resolution from the low value (ex: low + value * resolution).

Overrides:

toReference in class CoordinateSystem

Parameters:

tuples - range/azimuth values

Returns:

lat/lon values

Throws:

VisADException - tuples is null or wrong dimension

fromReference

public float[][] fromReference(float[][] tuples)
                        throws VisADException

Convert from latitude/longitude to range/azimuth. Returned values are in terms of multiples of the value resolution from the low value (ex: low + value * resolution).

Overrides:

fromReference in class CoordinateSystem

Parameters:

tuples - lat/lon values

Returns:

range/azimuth values

Throws:

VisADException - tuples is null or wrong dimension

equals

public boolean equals(Object cs)

Check to see if this is a Radar2DCoordinateSystem

Specified by:

equals in class CoordinateSystem

Parameters:

cs - object to compare

Returns:

true if cs is an instance of Radar2DCoordinateSystem

getAzimuthParameters

public float[] getAzimuthParameters()

Return the azimuth parameters

Returns:

array[] (len == 2) where array[0] = azl, array[1] = azr

getRangeParameters

public float[] getRangeParameters()

Return the range parameters

Returns:

array[] (len == 2) where array[0] = radl, array[1] = radr

getCenterPoint

public float[] getCenterPoint()

Get center point in lat/lon

Returns:

latlon array where array[0] = lat, array[1] = lon

toString

public String toString()

Return String representation of this Radar2DCoordinateSystem

Overrides:

toString in class Object

Returns:

string listing params