[Mapserver-users] MapServer raster 'cracking' problem

[Ed McNierney]

Omry -

I don't have time to look into this for a few more days, but I suspect
you are seeing an artifact of your data and rounding effects.  First,
make sure your data are as truly continuous as possible.  I think what
you're seeing is a request for a pixel that falls "between" your data
sets, or at least appears to fall between them for certain view scales.

	- Ed


Ed McNierney
President and Chief Mapmaker
TopoZone.com
ed at topozone.com


-----Original Message-----
From: Omry Yadan [mailto:omry at telmap.com] 
Sent: Sunday, November 09, 2003 3:56 AM
To: Alan Steremberg
Cc: mapserver-users at lists.gis.umn.edu
Subject: RE: [Mapserver-users] MapServer raster 'cracking' problem


This seems to be a real problem with MapServer.
Is anyone taking a look at it?

-----Original Message-----
From: Alan Steremberg [mailto:alans at wunderground.com] 
Sent: Wednesday, November 05, 2003 7:36 PM
To: Omry Yadan
Cc: mapserver-users at lists.gis.umn.edu
Subject: Re: [Mapserver-users] MapServer raster 'cracking' problem


I see the same problem using JPG or PNM files with GDAL.

Alan

----------------------------
 Alan Steremberg
 415-543-5021 x 103
 http://www.wunderground.com

On Wed, 5 Nov 2003, Omry Yadan wrote:

> I have a problem with raster image generated by map server where the
data
> source is tiled.
> The problem is that in some zoom levels (zoomed out), I get a white
line
> between two tiles sometimes.
> I ran a test with two tiles only, and I could reproduce the problem.
> the tiles boundaries are exactly one next to the other - to strengthen
the
> point :
> when I zoom into the merge line, I don't see a gap between the two
tiles.
> Initially, my data was in ECW format - to rule out ECW related issue,
I
> converted the data to GeoTiff, and I got the exact same problem (which
> appeared at the exact same requests.
>
> Any help would be appreciated.
>
> 	Omry.
>
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