[Mapserver-users] Max number of layers craps out at about 295

[Stephen Clark]

Pericles,

I chose the number 700 for each of the following :

#define MS_MAXCOLORS 700
#define MS_MAXCLASSES 700
#define MS_MAXLAYERS 700


because I thought that each LAYER needed the same number of CLASSES and
COLORS.

So can I assume that if I have about 3 classes per layer then I can use the
following:

#define MS_MAXCOLORS 128
#define MS_MAXCLASSES 128
#define MS_MAXLAYERS 700

or perhaps a number less than 128?

I will try out this option and recompile MS with the above specs.

thanks
Stephen


----- Original Message ----- 
From: "Pericles S. Nacionales" <nacional at cbs.umn.edu>
To: "Stephen Clark" <stephen.clark at focus.ca>
Cc: <mapserver-users at lists.gis.umn.edu>
Sent: Thursday, February 12, 2004 6:17 PM
Subject: Re: [Mapserver-users] Max number of layers craps out at about 295


> Stephen,
>
> I have a mapfile with more than 300 layers and it works just fine.  I
> don't know what your exact situation is but you can't possibly be using
> all 700 layers at once, can you?  I have noticed that you also changed
> your MAXCLASSES to 700 and MAXCOLORS to 700.  Why?  Do you really need
> to specify that many classes in a layer?  Try lowering the MAXCLASSES
> and putting MAXCOLORS back to 256.
>
> Like I said, I don't really know what your situation is but you might
> need to rethink how you'd accomodate all those layers in MapServer.  Are
> each of the layers so unique that you can't combine (union, merge,
> whatever) them?
>
> One more thing, are you sure that 295 is the max layers that your
> mapserv program can display, or is it that layer #295 has problems?
> With that many layers, debugging can't possibly be fun.
>
> OK, I promise this is the last thing... since your error message isn't
> sufficiently detailed. I used to get a similar error message which
> turned out to be due to corrupt shptree indices (this was back in the
> 3.3/3.4 days but you never know).  Do you have .qix files?  Try moving
> them out of the way.
>
> Good luck!
> -Perry N.
>
> PS: Does your web server's error log say anything about this?
>
>
> On Wed, 2004-02-11 at 17:27, Stephen Clark wrote:
> > Hi all,
> >
> > I am trying to get the max number of layers that MS will read from a
> > *.map file to be 500 or more.
> >
> > Once I exceed about 295 layers the MAP file will not be displayed.
> >
> > The error I get is 'The Memory could not be "read".' with some hex
> > codes displayed.
> >
> > I have attached my "map.h" file as reference.
> > Is there some other file that have to modify to be able to increase
> > the number of layers?
> >
> > thanks
> > Stephen
>
>
>
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