java.lang.Object
- uk.ac.starlink.ttools.plot2.layer.Unit
- - uk.ac.starlink.ttools.plot2.layer.SolidAngleUnit

```
public class SolidAngleUnit
extends Unit
```
Unit for solid angle quantities. Base unit is a square degree.

Since:

16 Jan 2018

Author:

Mark Taylor

Field Summary

Fields
Modifier and Type	Field	Description
`static SolidAngleUnit`	`ARCMIN2`	Square arcminute.
`static SolidAngleUnit`	`ARCSEC2`	Square arcsecond.
`static SolidAngleUnit`	`DEGREE2`	Square degree.
`static SolidAngleUnit`	`MAS2`	Square milliarcsecond.
`static SolidAngleUnit`	`STERADIAN`	Steradian.
`static SolidAngleUnit`	`UAS2`	Square microarcsecond.

Fields inherited from class uk.ac.starlink.ttools.plot2.layer.Unit
UNIT

Constructor Summary

Constructors
Constructor	Description
`SolidAngleUnit(java.lang.String label, java.lang.String textName, java.lang.String symbol, AngleUnit linearAngleUnit, java.lang.String description)`	Constructor.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`double`	`getExtentInSquareDegrees()`	Returns the extent of this unit in square degrees.
`static SolidAngleUnit[]`	`getKnownUnits()`	Returns an array of the defined solid angle units.

Methods inherited from class uk.ac.starlink.ttools.plot2.layer.Unit
equals, getDescription, getExtent, getLabel, getSymbol, getTextName, hashCode, toString

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Field Detail
  - STERADIAN
```
public static final SolidAngleUnit STERADIAN
```
    Steradian.
  - DEGREE2
```
public static final SolidAngleUnit DEGREE2
```
    Square degree.
  - ARCMIN2
```
public static final SolidAngleUnit ARCMIN2
```
    Square arcminute.
  - ARCSEC2
```
public static final SolidAngleUnit ARCSEC2
```
    Square arcsecond.
  - MAS2
```
public static final SolidAngleUnit MAS2
```
    Square milliarcsecond.
  - UAS2
```
public static final SolidAngleUnit UAS2
```
    Square microarcsecond.
- Constructor Detail
  - SolidAngleUnit
```
public SolidAngleUnit(java.lang.String label,
                      java.lang.String textName,
                      java.lang.String symbol,
                      AngleUnit linearAngleUnit,
                      java.lang.String description)
```
    Constructor.
    
    Parameters:
    
    label - text to appear in a selection interface
    
    textName - text to appear in user-directed descriptive text
    
    symbol - text to appear as unit metadata, preferably compatible with the VOUnit standard
    
    linearAngleUnit - unit corresponding to the square root of this
    
    description - textual description
- Method Detail
  - getExtentInSquareDegrees
```
public double getExtentInSquareDegrees()
```
    Returns the extent of this unit in square degrees.
    
    Returns:
    
    same as extent
  - getKnownUnits
```
public static SolidAngleUnit[] getKnownUnits()
```
    Returns an array of the defined solid angle units.
    
    Returns:
    
    list of known values

Class SolidAngleUnit

Field Summary

Fields inherited from class uk.ac.starlink.ttools.plot2.layer.Unit

Constructor Summary

Method Summary

Methods inherited from class uk.ac.starlink.ttools.plot2.layer.Unit

Methods inherited from class java.lang.Object

Field Detail

STERADIAN

DEGREE2

ARCMIN2

ARCSEC2

MAS2

UAS2

Constructor Detail

SolidAngleUnit

Method Detail

getExtentInSquareDegrees

getKnownUnits