[Geomoose-users] Image display covers up layers beyond its extent

[Jim Dahl]

Everyone, When I set transparency to true and tell it imagetype is PNG,
then the image around it shows.  However, the quality of the image is
poor so I cannot use it.  So I am back to using ECW.  Thanks again.
 
jim

	-----Original Message-----
	From: Dan Little [mailto:danlittle at yahoo.com] 
	Sent: Friday, November 07, 2008 2:07 PM
	To: Jim Dahl; geomoose-users at lists.sourceforge.net
	Subject: Re: [Geomoose-users] Image display covers up layers
beyond its extent
	
	
	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").
	
	This isn't a limitation of Mapserver or GeoMOOSE, it's a
limitation of the JPEG format.
	

	
________________________________

	From: Jim Dahl <jim.dahl at mail.co.douglas.mn.us>
	To: Dan Little <danlittle at yahoo.com>;
geomoose-users at lists.sourceforge.net
	Sent: Friday, November 7, 2008 2:01:50 PM
	Subject: RE: [Geomoose-users] Image display covers up layers
beyond its extent
	
	
	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?
	 
	jim

		-----Original Message-----
		From: Dan Little [mailto:danlittle at yahoo.com] 
		Sent: Friday, November 07, 2008 1:55 PM
		To: Jim Dahl; geomoose-users at lists.sourceforge.net
		Subject: Re: [Geomoose-users] Image display covers up
layers beyond its extent
		
		
		What type of layer is it?
		
		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.
		
		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.
		

		
________________________________

		From: Jim Dahl <jim.dahl at mail.co.douglas.mn.us>
		To: geomoose-users at lists.sourceforge.net
		Sent: Friday, November 7, 2008 11:08:54 AM
		Subject: [Geomoose-users] Image display covers up layers
beyond its extent
		
		
		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.
		 
		thanks,
		 

		Jim Dahl, GISP
		GIS Coordinator
		Douglas County Public Works
		509 3rd Ave W
		PO Box 398
		Alexandria MN 56308

		V 320-762-2933
		   320-763-6001
		F 320-763-7955

		 



-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.osgeo.org/pipermail/geomoose-users/attachments/20081107/84773ce9/attachment.html