[mapserver-users] Random acts of display...

[Chad Streck]

Hopefully this will be my last issue for a while.  Everyone has been 
great in helping keep this project going.

I have 2 issues that seem rather random.  One happens on both NT and 
Linux, and the other happens only on NT.  The system is php_mapscript 
with php_proj.  The Linux system is running Apache/php4.0.4pl1/Postgres 
and the NT system is running IIS/php4.0.4pl1/MSSQL7 (actually MSDE).

1) I have roughly 11 layers in my mapfile and when the script runs, I 
populate 4 of the layers with points from an SQL table, 1 layer gets one 
point to highlight if the user has clicked on one of the previous 
points, and 1 layer gets a copyright notice.  They are populated in that 
order, and all other layers are county, highway, roads, hydro area and 
imagery.  The highlight layer displays a triangle with the company name 
next to it, and this is the layer that concerns me.  I have an addpoint 
function that plots the point, with annotation/name if its included, and 
then it does a drawLabelCache.  The problem that exists is that it tends 
to only render the name when it feels like it.  I can keep clicking on a 
point and it always renders the triangle, but only about 25%-50% of the 
time it renders the name.  I can add and test add point with all static 
values for x, y, and name, and it works all the time.  Finally, I do a 
drawLabelCache before I saveWebImage on the map file.  Very frustrating 
and I'm unsure where to look.  My only theory right now is that by 
running on smaller machines (333 and a 266) that they tend to drop 
things in an effort to speed up processing, but thats only a theory.  
(Programmers LOVE theory.)

2) On the NT port, I have the exact same application running, but it 
seems that about 50% of the time, no dots on the first 4 generated 
layers don't show.  Most times I get no errors, and if I do get 
warnings, they are divide by 0 warnings.  When looking at the what it is 
dividing by, the statment is a divide by extent->maxx - extent->minx.   
I have the same theory as above.

Any help or hints would be appreciated.  I attached my mapfile if it 
will help.

Thanks,
Chad Streck
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