<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:arial,helvetica,sans-serif;font-size:10pt"><div>Images being served as a JPEG are not "see through" so if you have an ECW that covers the City, mapserver will fill the rest of the image with a color (typically white). Transparency comes into play, because if you serve the image as a PNG or GIF then the "white" becomes "see through" (aka "transparent").<br><br>This isn't a limitation of Mapserver or GeoMOOSE, it's a limitation of the JPEG format.<br></div><div style="font-family: arial,helvetica,sans-serif; font-size: 10pt;"><br><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><font face="Tahoma" size="2"><hr size="1"><b><span style="font-weight: bold;">From:</span></b> Jim Dahl <jim.dahl@mail.co.douglas.mn.us><br><b><span style="font-weight: bold;">To:</span></b> Dan Little <danlittle@yahoo.com>;
geomoose-users@lists.sourceforge.net<br><b><span style="font-weight: bold;">Sent:</span></b> Friday, November 7, 2008 2:01:50 PM<br><b><span style="font-weight: bold;">Subject:</span></b> RE: [Geomoose-users] Image display covers up layers beyond its extent<br></font><br>
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<div><span class="623035719-07112008"><font color="#0000ff" face="Arial" size="2">The
image is an ECW but JPG acts the same way. My question is why does
transparency come into play when I do not want to see under the image, I want to
see beyond the extent of the image. For example the image is 1 mile by 1
mile and it still covers up the whole county. Is that because the
mapserver still thinks the image is county-wide?</font></span></div>
<div><span class="623035719-07112008"><font color="#0000ff" face="Arial" size="2"></font></span> </div>
<div><span class="623035719-07112008"><font color="#0000ff" face="Arial" size="2">jim</font></span></div>
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<div class="OutlookMessageHeader" dir="ltr" align="left" lang="en-us"><font face="Tahoma" size="2">-----Original Message-----<br><b>From:</b> Dan Little
[mailto:danlittle@yahoo.com] <br><b>Sent:</b> Friday, November 07, 2008 1:55
PM<br><b>To:</b> Jim Dahl;
geomoose-users@lists.sourceforge.net<br><b>Subject:</b> Re: [Geomoose-users]
Image display covers up layers beyond its extent<br><br></font></div>
<div style="font-size: 10pt; font-family: arial,helvetica,sans-serif;">
<div>What type of layer is it?<br><br>If it's raster it's a little harder to
deal with because it's probably being served as a JPEG and JPEG's don't
support transparency.<br><br>If it's a GIF then it's pretty easy to just set
the image as transparent, so if there isn't any data it shouldn't show
up.<br></div>
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<b><span style="font-weight: bold;">From:</span></b> Jim Dahl
<jim.dahl@mail.co.douglas.mn.us><br><b><span style="font-weight: bold;">To:</span></b>
geomoose-users@lists.sourceforge.net<br><b><span style="font-weight: bold;">Sent:</span></b> Friday, November 7, 2008 11:08:54
AM<br><b><span style="font-weight: bold;">Subject:</span></b> [Geomoose-users]
Image display covers up layers beyond its extent<br></font><br>
<div><span class="113060417-07112008"><font face="Arial" size="2">Hope to have
better luck with this question.. Does anyone know how I can keep an
image that covers only a city from covering up another image below it that
covers the entire county? The extent doesn't seem to work for me in the
mapfile.</font></span></div>
<div><span class="113060417-07112008"><font face="Arial" size="2"></font></span> </div>
<div><span class="113060417-07112008"><font face="Arial" size="2">thanks,</font></span></div>
<div> </div>
<p align="left"><font face="Arial" size="2">Jim Dahl, GISP</font><br><font face="Arial" size="2">GIS Coordinator</font><br><font face="Arial" size="2">Douglas
County Public Works</font><br><font face="Arial" size="2">509 3rd Ave
W</font><br><font face="Arial" size="2">PO Box 398</font><br><font face="Arial" size="2">Alexandria MN 56308</font></p>
<p><font face="Arial" size="2">V 320-762-2933</font><br><font face="Arial" size="2"> 320-763-6001</font><br><font face="Arial" size="2">F
320-763-7955</font></p>
<div> </div></div></div></div><br></blockquote></div></div></div><br>
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