org.deegree.ogcwebservices.wms.capabilities
Class ScaleHint

java.lang.Object
  org.deegree.ogcwebservices.wms.capabilities.ScaleHint

public class ScaleHint
extends Object

Layers may include a element that suggests minimum and maximum scales for which it is appropriate to display this layer. Because WMS output is destined for output devices of arbitrary size and resolution, the usual definition of scale as the ratio of map size to real-world size is not appropriate here. The following definition of Scale Hint is recommended. Consider a hypothetical map with a given Bounding Box, width and height. The central pixel of that map (or the pixel just to the northwest of center) will have some size, which can be expressed as the ground distance in meters of the southwest to northeast diagonal of that pixel. The two values in ScaleHint are the minimum and maximum recommended values of that diagonal. It is recognized that this definition is not geodetically precise, but at the same time the hope is that by including it conventions will develop that can be later specified more clearly.

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Version:

$Revision: 18195 $

Author:

Andreas Poth, Markus Schneider

Constructor Summary

ScaleHint(double min, double max)
constructor initializing the class with the

Method Summary

double	getMax()
double	getMin()
void	setMax(double max) sets the maximum scale for which a layer is defined
void	setMin(double min) sets the minimum scale for which a layer is defined
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

ScaleHint

public ScaleHint(double min,
                 double max)

constructor initializing the class with the

Parameters:

min -

max -

Method Detail

getMin

public double getMin()

Returns:

the minimum scale for which a layer is defined

setMin

public void setMin(double min)

sets the minimum scale for which a layer is defined

Parameters:

min -

getMax

public double getMax()

Returns:

the maximum scale for which a layer is defined

setMax

public void setMax(double max)

sets the maximum scale for which a layer is defined

Parameters:

max -

toString

public String toString()

Overrides:

toString in class Object