[Mapserver-users] Zoom In to a defined area

[Jeff L.]

Hi,

By knowing the map coordinates of a specific area (xMin, yMin, xMax and 
yMax), i would like to zoom in to such area. I have a combo box with defined 
areas to zoom in, i’m using CGI and JavaScript to change map extents, but no 
success so far. My question would be how to pass the map extents and may be 
the center of the image is also required to change? Here is my code snippet:
....

<SCRIPT LANGUAGE="JavaScript"><!--

function AreaSelected()
{
    if (document.forms[0].ViewArea.selectedIndex != 0 &&
	 document.forms[0].ViewArea.selectedIndex !=1)
    	document.forms[0].submit();
}

//--></SCRIPT>

<form method=GET action="[program]" name=myform>

....

<SELECT NAME="ViewArea"  onChange="AreaSelected()">
<OPTION>Go to</OPTION>
<OPTION>- - - - - - - - - - - - - </OPTION>
<OPTION VALUE="-180,45,180,90">Area 1</OPTION>
<OPTION VALUE="-180,0,180,45">Area 2</OPTION>
</SELECT >

....

<input type="hidden" name="imgxy" value="299.5 299.5">
<input type="hidden" name="imgext" value="[mapext]">
....
</form>


Any help is appreciated

Jeff Lacoste

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