<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
<HTML>
<HEAD>
<META NAME="Generator" CONTENT="MS Exchange Server version 6.5.7226.0">
<TITLE>[UMN_MAPSERVER-USERS] Bug? MapServer as an html <img .. > source</TITLE>
</HEAD>
<BODY>
<DIV id=idOWAReplyText85803 dir=ltr>
<DIV dir=ltr><FONT face=Arial color=#000000 size=2>Ugh I meant web server error
log.</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial size=2>-e</FONT></DIV></DIV>
<DIV dir=ltr><BR>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> UMN MapServer Users List on behalf of
Ethan Alpert<BR><B>Sent:</B> Fri 11/19/2004 7:39 PM<BR><B>To:</B>
MAPSERVER-USERS@LISTS.UMN.EDU<BR><B>Subject:</B> Re: [UMN_MAPSERVER-USERS] Bug?
MapServer as an html <img .. > source<BR></FONT><BR></DIV>
<DIV>
<DIV id=idOWAReplyText13675 dir=ltr>
<DIV dir=ltr><FONT face=Arial color=#000000 size=2>Two STYLE blocks in your
LAYER definition seem suscpicious. What happens if you set up the class
like:</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2></FONT> </DIV>
<DIV dir=ltr><FONT size=2> CLASS<BR> NAME
"Forest Fire Areas"<BR> COLOR 200 110
110<BR> OUTLINECOLOR 100 100 100<BR>
END</FONT><BR></DIV>
<DIV dir=ltr>BTW, If you get a red X when using a <img> tag. Type the src
part directly into the browser. ie:</DIV>
<DIV dir=ltr><FONT size=2><A
href="http://yourmachine/cgi-bin/mapserv.exe?&mode=map&mapext=XX">http://yourmachine/cgi-bin/mapserv.exe?&mode=map&mapext=XX</A>
XX XX XX&map=[map]<BR>&map_SIZE=125
75&layer=Forest_Fires_1965-2003'</FONT></DIV>
<DIV dir=ltr><FONT size=2></FONT> </DIV>
<DIV dir=ltr><FONT size=2></FONT> </DIV>
<DIV dir=ltr><FONT size=2>This way you get an error message (hopefully). If you
don't you might need to look at your webbrowser error log.</FONT></DIV>
<DIV dir=ltr><FONT size=2></FONT> </DIV>
<DIV dir=ltr><FONT size=2>-e</FONT></DIV></DIV>
<DIV dir=ltr>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> UMN MapServer Users List on behalf of Ken
Lord<BR><B>Sent:</B> Fri 11/19/2004 7:27 PM<BR><B>To:</B>
MAPSERVER-USERS@LISTS.UMN.EDU<BR><B>Subject:</B> [UMN_MAPSERVER-USERS] Bug?
MapServer as an html <img .. > source<BR></FONT><BR></DIV>
<DIV>
<P><FONT size=2>I use mapserver to generate thumbnail images in query result
pages, using<BR>mapserver as the source for an html <img ...>
tag.<BR><BR>This has worked fine in MapServer 3.6 CGI without errors. I've
used<BR>variables passed in the URL to layers with filteritems to have the
queried<BR>features shown alone with background layers, used URL parameters to
modify<BR>the map file dynamicaly to embed and resize the scalebar, and added a
cross<BR>hair to center of the image using the map_webuser.. URL
parameters.<BR><BR>I'm now trying to do the same with MapServer 4.2.0 CGI. using
the same<BR>polygon dataset as I was using in 3.6. It is not working
consistantly.<BR><BR>It will work generating an image for some polygons, fail -
not returning an<BR>image when other polygons in the same layer are queried, and
work for other<BR>polygons in the same layer if you click in just the right
place within<BR>them. For all these queries, all the other attributes
queried are being<BR>returned correctly in my template. Restarting the server
had the effect of<BR>shuffling the polygons that would and wouldnt
work.<BR><BR>I have simplified the image source string down to only the problem
layer,<BR>with no filtering, and only the parameters necessary to create the
image.<BR><BR>Simplified, the img tag looks like this:<BR><BR><img
src='../scripts/mapserv.exe?&mode=map&mapext=XX XX XX
XX&map=[map]<BR>&map_SIZE=125
75&layer=Forest_Fires_1965-2003'><BR><BR>The mapext gets filled in by
javascript.<BR><BR>If I change it so that it displays some other background
layer, but not the<BR>layer being queried, the image returns properly
everytime.<BR><BR>The layer within the mapfile looks like
this:<BR><BR>LAYER<BR> NAME Forest_Fires_1965-2003<BR> TYPE
POLYGON<BR> STATUS ON<BR> DATA "nt_FFIRES_a"<BR> HEADER
"results/Forest_Fires_1965-2003_header.html"<BR> TEMPLATE
"results/Forest_Fires_1965-2003_results.html"<BR> TOLERANCE 2<BR>
TOLERANCEUNITS pixels<BR> PROJECTION<BR>
"init=EPSG:26910"<BR> END<BR>
CLASS<BR> NAME "Forest Fire
Areas"<BR> STYLE<BR> COLOR
200 110 110<BR>
END<BR> STYLE<BR>
OUTLINECOLOR 100 100 100<BR> END<BR>
END<BR>END<BR><BR>I can't figure out why it works sometimes ... instead of
always or never.<BR>It is the identical dataset that works everytime for the
same use with<BR>mapserver 3.6. The shapefile is about 9mb of very
irregular polygons.<BR><BR>Is this a new bug? has it already been fixed in 4.4?
Will I have to keep a<BR>set of 3.6 files in place just to make the
thumbnails?<BR><BR>Any ideas would be appreciated, the thumbnails add a lot of
power to the<BR>query result pages.<BR><BR>Thanks,<BR>Ken Lord<BR>Vancouver
BC<BR></FONT></P></DIV></DIV>
</BODY>
</HTML>