org.deegree_impl.services.wms.capabilities
Class ScaleHint_Impl

java.lang.Object
  org.deegree_impl.services.wms.capabilities.ScaleHint_Impl

All Implemented Interfaces:

Marshallable, ScaleHint

class ScaleHint_Impl

extends java.lang.Object

implements ScaleHint, Marshallable

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: 1.8 $

Author:

Andreas Poth, Markus Schneider

Field Summary

private double	max
private double	min

Constructor Summary

(package private)	ScaleHint_Impl() default constructor
(package private)	ScaleHint_Impl(double min, double max) constructor initializing the class with the

Method Summary

java.lang.String	exportAsXML() Returns an XML representation of this object.
double	getMax() returns the maximum scale for which a layer is defined
double	getMin() returns the minimum scale for which a layer is defined
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
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

max

private double max

min

private double min

Constructor Detail

ScaleHint_Impl

ScaleHint_Impl()

default constructor

ScaleHint_Impl

ScaleHint_Impl(double min,
               double max)

constructor initializing the class with the

Method Detail

getMin

public double getMin()

returns the minimum scale for which a layer is defined

Specified by:

getMin in interface ScaleHint

setMin

public void setMin(double min)

sets the minimum scale for which a layer is defined

getMax

public double getMax()

returns the maximum scale for which a layer is defined

Specified by:

getMax in interface ScaleHint

setMax

public void setMax(double max)

sets the maximum scale for which a layer is defined

toString

public java.lang.String toString()

Returns:

exportAsXML

public java.lang.String exportAsXML()

Returns an XML representation of this object.

Specified by:

exportAsXML in interface Marshallable

Returns:

XML-representation of this object