Name

Type

Description

width

Number

圖片寬度(pixel)

height

Number

圖片高度(pixel)

extent

sg.geometry.Extent

圖片範圍

href

String

圖片的URL

opacity

Number

圖片透明度，範圍為0到1

0:透明

1:不透明

<script type="text/javascript" src="scripts/Layer.js"></script>

<script type="text/javascript" src="scripts/Geometry.js"></script>

//Create the extent of MapImage

var pmapExt = new sg.geometry.Extent(13277608.9807431, 2449664.06609527, 13640272.4782023, 2972946.29177018);

//Create the MapImage

var option = {

extent: pmapExt,

width:430,        //the width of this image

height:620,        //the height of this image

opacity:0.7,

href:"images/TaiwanHistoricMap.png" // the source of the imape. Could be a URL.

};

var MapImg = new sg.layers.MapImage(option);