Strange map draw issue

[P Kishor]

Steve,

Could you possibly give us the link to your live (but wonky) demo
instead of the wonky images...? Just curious.

On 9/14/06, Steve Hall <steve.hall at mercatorgeosystems.co.uk> wrote:
>
>  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
>  ed at topozone.com
>  (978) 251-4242
>
>  ________________________________
> From: UMN MapServer Users List
> [mailto:MAPSERVER-USERS at LISTS.UMN.EDU] On Behalf Of Steve
> Hall
>  Sent: Thursday, September 14, 2006 9:22 AM
>  To: MAPSERVER-USERS at LISTS.UMN.EDU
>  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
>
>
>
>
>  --
> Steve Hall
> Technical Consultant
> Mercator GeoSystems Ltd
>
> Tel (UK) : +44 (0) 114 235 3409
> Tel (US) : +1 (562) 735 3541
> Fax : +44 (0) 114 235 3409
> Mobile : +44 (0) 771 828 6323
> Email : steve.hall at mercatorgeosystems.com
> Web : www.mercatorgeosystems.com
> Skype : mercatorgeosystems
>
>
>
>


-- 
Puneet Kishor http://punkish.eidesis.org/
Nelson Inst. for Env. Studies, UW-Madison http://www.ies.wisc.edu/
Open Source Geospatial Foundation https://edu.osgeo.org/