Re: [UMN_MAPSERVER-USERS] Strange map draw issue

[Steve Hall]

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:MAPSERVER-USERS@LISTS.UMN.EDU] On Behalf Of Steve Hall Sent: Thursday, September 14, 2006 9:22 AM To: MAPSERVER-USERS@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 : [EMAIL PROTECTED] Web : www.mercatorgeosystems.com Skype : mercatorgeosystems