java.lang.Object
- com.esri.arcgisruntime.geoanalysis.Analysis
- - com.esri.arcgisruntime.geoanalysis.Viewshed

Direct Known Subclasses:

GeoElementViewshed, LocationViewshed
```
public abstract class Viewshed
extends Analysis
```
Viewshed is a type of visibility analysis that shows the visible and obstructed areas covered by a directed field of view. Visible and obstructed areas are determined for an area defined by an observer location, horizontal and vertical view angles, and a minimum/maximum distance range. These properties define a frustum (a 3D solid) inside of which visibility is calculated.
Viewshed analysis is visual only - the result is rendered on to the GeoView, there is no API to get the visible and obstructed areas as geometries.
Viewshed analysis is reactive - whenever data changes (such as change in scene layer load status or visibility), the viewshed will automatically update.
Notes on JavaSE:
- Maximum number of viewsheds per GeoView is 16. Viewsheds in excess of 16 will not be rendered.
Notes on Android:
- Viewshed is supported only on devices that support OpenGL ES 3.0 or later. For unsupported devices, adding a Viewshed may not render anything.
- If Viewshed is always required by your application and cannot be enabled/disabled, then add the following to the application's Manifest:
```
<uses-feature android:glEsVersion="0x00030000" android:required="true" />
```
- If Viewshed is not always required by your application and can be enabled/disabled, then add the following to the application's Manifest:
```
<uses-feature android:glEsVersion="0x00020000" android:required="true" />
```
  In this case, the application can query the version of OpenGL ES and enable Viewshed if the supported version is at least 3.0. For more details see OpenGL ES
- Maximum number of viewsheds per GeoView is 8. Viewsheds in excess of 8 will not be rendered.
Since:

100.2.0

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`static int`	`getFrustumOutlineColor()`	Gets the color to render the frustum outline.
`double`	`getHorizontalAngle()`	Gets the horizontal spread of the viewshed, in degrees, > 0 and <= 360.
`double`	`getMaxDistance()`	Gets the maximum distance from the viewshed Location where the viewshed renders, in meters within [0, Double.MAX_VALUE].
`double`	`getMinDistance()`	Gets the minimum distance from the location where the viewshed starts to render, in meters within [0, Double.MAX_VALUE].
`static int`	`getObstructedColor()`	Gets the color to render areas not visible from the observer location and within the frustum.
`double`	`getVerticalAngle()`	Gets the vertical spread of the viewshed, in degrees, > 0 and <= 360.
`static int`	`getVisibleColor()`	Gets the color to render areas visible from the observer location and within the frustum.
`boolean`	`isFrustumOutlineVisibile()`	Gets whether the outline of the frustum is visible.
`static void`	`setFrustumOutlineColor(int frustumOutlineColor)`	Sets the color to render the frustum outline.
`void`	`setFrustumOutlineVisible(boolean frustumOutlineVisible)`	Sets whether the outline of the frustum should be visible.
`void`	`setHorizontalAngle(double horizontalAngle)`	Sets the horizontal spread of the viewshed, in degrees, > 0 and <= 360.
`void`	`setMaxDistance(double maxDistance)`	Sets the maximum distance from the viewshed Location where the viewshed renders, in meters within [0, Double.MAX_VALUE].
`void`	`setMinDistance(double minDistance)`	Sets the minimum distance from the location where the viewshed starts to render, in meters within [0, Double.MAX_VALUE].
`static void`	`setObstructedColor(int obstructedColor)`	Sets the color to render areas not visible from the observer location and within the frustum.
`void`	`setVerticalAngle(double verticalAngle)`	Sets the vertical spread of the viewshed, in degrees, > 0 and <= 360.
`static void`	`setVisibleColor(int visibleColor)`	Sets the color to render areas visible from the observer location and within the frustum.

Methods inherited from class com.esri.arcgisruntime.geoanalysis.Analysis
isVisible, setVisible

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

- Method Detail
  - setVisibleColor
```
public static void setVisibleColor(int visibleColor)
```
    Sets the color to render areas visible from the observer location and within the frustum.
    
    Parameters:
    
    visibleColor - the color of visible areas, as 0xAARRGGBB
    
    Since:
    
    100.2.0
  - getVisibleColor
```
public static int getVisibleColor()
```
    Gets the color to render areas visible from the observer location and within the frustum.
    
    Returns:
    
    the color of visible areas, as 0xAARRGGBB
    
    Since:
    
    100.2.0
  - setObstructedColor
```
public static void setObstructedColor(int obstructedColor)
```
    Sets the color to render areas not visible from the observer location and within the frustum.
    
    Parameters:
    
    obstructedColor - the color of areas not visible, as 0xAARRGGBB
    
    Since:
    
    100.2.0
  - getObstructedColor
```
public static int getObstructedColor()
```
    Gets the color to render areas not visible from the observer location and within the frustum.
    
    Returns:
    
    the color of areas not visible, as 0xAARRGGBB
    
    Since:
    
    100.2.0
  - setFrustumOutlineColor
```
public static void setFrustumOutlineColor(int frustumOutlineColor)
```
    Sets the color to render the frustum outline.
    
    Parameters:
    
    frustumOutlineColor - the color of the frustum outline, as 0xAARRGGBB
    
    Since:
    
    100.2.0
  - getFrustumOutlineColor
```
public static int getFrustumOutlineColor()
```
    Gets the color to render the frustum outline.
    
    Returns:
    
    the color of the frustum outline, as 0xAARRGGBB
    
    Since:
    
    100.2.0
  - getHorizontalAngle
```
public double getHorizontalAngle()
```
    Gets the horizontal spread of the viewshed, in degrees, > 0 and <= 360.
    Default is 90.
    
    Returns:
    
    the horizontal spread of the viewshed, in degrees, > 0 and <= 360
    
    Since:
    
    100.2.0
  - setHorizontalAngle
```
public void setHorizontalAngle(double horizontalAngle)
```
    Sets the horizontal spread of the viewshed, in degrees, > 0 and <= 360.
    
    Parameters:
    
    horizontalAngle - the horizontal spread of the viewshed, in degrees, > 0 and <= 360
    
    Since:
    
    100.2.0
  - getVerticalAngle
```
public double getVerticalAngle()
```
    Gets the vertical spread of the viewshed, in degrees, > 0 and <= 360.
    Default is 90.
    
    Returns:
    
    the vertical spread of the viewshed, in degrees, > 0 and <= 360
    
    Since:
    
    100.2.0
  - setVerticalAngle
```
public void setVerticalAngle(double verticalAngle)
```
    Sets the vertical spread of the viewshed, in degrees, > 0 and <= 360.
    
    Parameters:
    
    verticalAngle - the vertical spread of the viewshed, in degrees, > 0 and <= 360
    
    Since:
    
    100.2.0
  - getMinDistance
```
public double getMinDistance()
```
    Gets the minimum distance from the location where the viewshed starts to render, in meters within [0, Double.MAX_VALUE].
    
    Returns:
    
    the minimum distance from the location where the viewshed starts to render, in meters within [0, Double.MAX_VALUE]
    
    Since:
    
    100.2.0
  - setMinDistance
```
public void setMinDistance(double minDistance)
```
    Sets the minimum distance from the location where the viewshed starts to render, in meters within [0, Double.MAX_VALUE].
    
    Parameters:
    
    minDistance - the minimum distance from the location where the viewshed starts to render, in meters within [0, Double.MAX_VALUE]
    
    Since:
    
    100.2.0
  - getMaxDistance
```
public double getMaxDistance()
```
    Gets the maximum distance from the viewshed Location where the viewshed renders, in meters within [0, Double.MAX_VALUE].
    
    Returns:
    
    the maximum distance from the viewshed Location where the viewshed renders, in meters within [0, Double.MAX_VALUE]
    
    Since:
    
    100.2.0
  - setMaxDistance
```
public void setMaxDistance(double maxDistance)
```
    Sets the maximum distance from the viewshed Location where the viewshed renders, in meters within [0, Double.MAX_VALUE].
    
    Parameters:
    
    maxDistance - the maximum distance from the viewshed Location where the viewshed renders, in meters within [0, Double.MAX_VALUE]
    
    Since:
    
    100.2.0
  - isFrustumOutlineVisibile
```
public boolean isFrustumOutlineVisibile()
```
    Gets whether the outline of the frustum is visible.
    Default is false.
    
    Returns:
    
    true if the outline of the frustum is visible, otherwise false
    
    Since:
    
    100.2.0
  - setFrustumOutlineVisible
```
public void setFrustumOutlineVisible(boolean frustumOutlineVisible)
```
    Sets whether the outline of the frustum should be visible.
    Default is false.
    
    Parameters:
    
    frustumOutlineVisible - true if the outline of the frustum should be visible, otherwise false
    
    Since:
    
    100.2.0

Class Viewshed

Method Summary

Methods inherited from class com.esri.arcgisruntime.geoanalysis.Analysis

Methods inherited from class java.lang.Object

Method Detail

setVisibleColor

getVisibleColor

setObstructedColor

getObstructedColor

setFrustumOutlineColor

getFrustumOutlineColor

getHorizontalAngle

setHorizontalAngle

getVerticalAngle

setVerticalAngle

getMinDistance

setMinDistance

getMaxDistance

setMaxDistance

isFrustumOutlineVisibile

setFrustumOutlineVisible