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<TITLE>Hide Layers on HTML legend where filtered results are null</TITLE>
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<DIV><SPAN class=924492619-14112002><FONT face=Arial color=#0000ff
size=2>Steve,</FONT></SPAN></DIV>
<DIV><SPAN class=924492619-14112002><FONT face=Arial color=#0000ff
size=2>Without Mapscript, I suspect that's going to be hard to do. The two
ways I know of to hide a layer in the legend is:</FONT></SPAN></DIV>
<DIV><SPAN class=924492619-14112002><FONT face=Arial color=#0000ff size=2>1)
Setting the status to off -> requires not using an opt_flag of
2.</FONT></SPAN></DIV>
<DIV><SPAN class=924492619-14112002><FONT face=Arial color=#0000ff size=2>2)
Using the order_metadata feature, and setting the metadata value to a negative
number. In this case the status is irrelevant.</FONT></SPAN></DIV>
<DIV><SPAN class=924492619-14112002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=924492619-14112002><FONT face=Arial color=#0000ff
size=2>I'm don't think you can do either as the result of a filter
without Mapscript. Perhaps someone else knows a
way....</FONT></SPAN></DIV>
<DIV><SPAN class=924492619-14112002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=924492619-14112002><FONT face=Arial color=#0000ff
size=2>-Dan</FONT></SPAN></DIV>
<DIV><SPAN class=924492619-14112002><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px solid; MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> Palmer, Steve
[mailto:Steve_Palmer@lpsg.com]<BR><B>Sent:</B> Thursday, November 14, 2002
11:27 AM<BR><B>To:</B> mapserver-users@lists.gis.umn.edu<BR><B>Subject:</B>
[mapserver-users] Hide Layers on HTML legend where filtered results are
null<BR><BR></FONT></DIV>
<P><FONT face=Arial size=2>I've waded through hundreds and hundreds of
archived messages and have not found any guidance and am hoping someone can
point me in the right direction.</FONT></P>
<P><FONT face=Arial size=2>I am displaying layers on an HTML legend</FONT>
</P>
<P><FONT face=Arial size=2>The content of those layers is controlled by
passing a filter value as part of my GET string
(map_mylayername_filter=somevalue)</FONT></P>
<P><FONT face=Arial size=2>If the filter doesn't "find" any records, I would
like to be able to hide that layer on my legend</FONT> </P>
<P><FONT face=Arial size=2>Any tips/guidance that anyone could provide would
be greatly appreciated</FONT> </P>
<P><FONT face=Arial size=2>MapServer 3.6.1, WinNT/IIS4 - Win2000/IIS5</FONT>
</P>
<P><FONT face=Arial size=2>Thanks</FONT> </P>
<P><FONT face=Arial
size=2>*************************************************************************************************************</FONT>
<BR><FONT face=Arial size=2>Steve Palmer</FONT> <BR><FONT face=Arial
size=2>GIS Developer</FONT> <BR><FONT face=Arial size=2>406-728-9323
x206<B></B></FONT> </P></BLOCKQUOTE></BODY></HTML>