Thanks Steve,
I suspect it must be a data or config based issue as the same server /
mapserver / web server is used (heavily) in other configurations with no
sign of this problem. It's just this map file & database with the issue.
Steve H
Stephen Woodbridge wrote:
Steve,
How is your server/mapscript/etc configured. It sounds like you could
possibly getting mapscript thread corruption or something similar to
that.
-Steve W
Steve Hall wrote:
Sorry Ed, I must have forgotten to put that part in my email.
Yes, a simple refresh of the same map will, 9 times ot of 10, get rid
of the garbage. But then at a random interval it will reappear (but
will be different garbage).
It's kind of hard for me to "post" the entire app, or allow access,
right now i'm afraid so I appreciate it may be hard for anyone to
help, I as just fishing for ideas really!
Thanks,
Steve
Ed McNierney wrote:
Steve -
I actually was asking if the output changed if the SAME map was
refreshed - don't zoom in, out, or pan, just refresh the
image/reload the page. Does the same image request always return
the same image?
- Ed
Ed McNierney
President and Chief Mapmaker
TopoZone.com / Maps a la carte, Inc.
73 Princeton Street, Suite 305
North Chelmsford, MA 01863
[EMAIL PROTECTED]
(978) 251-4242
------------------------------------------------------------------------
*From:* Steve Hall [mailto:[EMAIL PROTECTED]
*Sent:* Thursday, September 14, 2006 10:39 AM
*To:* Ed McNierney
*Cc:* [email protected]
*Subject:* Re: [UMN_MAPSERVER-USERS] Strange map draw issue
Hi Ed,
Thanks for this. I may check my label columns in the database for
NULLs and replace them with an empty string ('') instead. It looks
like a classic 'null' issue doesn't it?
Yup - zoom in, zoom out, pan etc and the garbage generally just
disappears, or changes its 'content'. Often the angle is the same
(suspicious) but sometimes not..... There aren't any features on
the angles so i'm not sure if it's a labelling issue or not. Plus
the problem only occurs about 1 in 20 or so map draws so is kind of
hard to get a definite problem case.
Checkout these additional ones :
http://demo.mercatorgeosystems.co.uk/tmp/1158243616324003.png
And just to prove it's not all CA.... ;-)
http://demo.mercatorgeosystems.co.uk/tmp/1158244089248601.png
http://demo.mercatorgeosystems.co.uk/tmp/1158244147717403.png
Thanks Ed,
Steve
Take a
Ed McNierney wrote:
Steve -
Well, just about anything in California is a little odd.....
Are you saying that if you simply refresh the image and re-draw the
exact same map you'll see this line of text change? That's
puzzling. I would speculate that it's a (garbage) text label for
some garbage feature - there's some feature that's defective in
both location and label (attributes messed up) and that feature is
being labeled.
The first thing I'd try is to eliminate layers from the image,
testing until the garbage goes away. That could identify the
offending layer; if there are multiple classes in that layer, use
the same system to identify which class it is. Then see if that
says anything helpful.
- Ed
Ed McNierney
President and Chief Mapmaker
TopoZone.com / Maps a la carte, Inc.
73 Princeton Street, Suite 305
North Chelmsford, MA 01863
[EMAIL PROTECTED]
(978) 251-4242
------------------------------------------------------------------------
*From:* UMN MapServer Users List
[mailto:[EMAIL PROTECTED] *On Behalf Of *Steve Hall
*Sent:* Thursday, September 14, 2006 9:22 AM
*To:* [email protected]
*Subject:* [UMN_MAPSERVER-USERS] Strange map draw issue
Hi All,
I've been using Mapserver for a while now, in a variety of
situations, but am seeing a slightly strange behaviour in one of my
setups. Basically i'm getting a line of 'garbage' being drawn
across the generated map image.
A sample of what I mean is here :
http://demo.mercatorgeosystems.co.uk/tmp/1158239461914994.png
There is no road feature or other line that should be there, and if
I redraw the map the line of garbage will either disappear or
change in either length or 'content'. It doesn't appear all the
time, but certainly enough to be annoying.
My MapServer version is 4.8.1, running with Apache 1.3.31 on Fedora
Core 4. I've got several other MapServer based configurations on
this setup and they're all working fine. The data source in
question is an Oracle 10g (10.1) database which is also used for
other systems and seems fine.....
Weird eh? Any suggestions much appreciated!
Thanks,
Steve H
