Maximum number of class styles, 5, has been reached

[Steve Lime]

The number of zoom levels shouldn't have anything to do with it from the MapServer point of view although perhaps
there is something funky going on. I can't see where you'd want styles accumulating like that. (I can see 1 then 2 
then 3 but how that gets bigger than that is escaping me).

BTW There is an RFC to switch all relavant static arrays to dynamically allocated arrays that would help. Something
tells me that's not the issue here though.

Steve

>>> Ludwig Max Brinckmann <ludwigbrinckmann at GMAIL.COM> 7/13/2006 2:48:49 PM >>>
I am hitting the threshold because I have the three styles on multiple zoom
levels.
But in Primagis there is now a way of combining the symbolizers, so that it
would equate one style per zoomlevel. I am not sure how this maps down to
mapserver, but I will give it a try tomorrow. Sean is also helping me out
with this. (The worst would be recompiling, so the issue is not exactly
pressing).

Ludwig


On 7/13/06, Steve Lime <Steve.Lime at dnr.state.mn.us> wrote:
>
> Um, er... It was a relatively arbitrary decision. By that I mean I didn't
> have any symbolization use cases that
> required more than 3, let alone 5. So to bump it you'd have to recompile.
> There should be virtually no penalty
> for going to a value of say 10.
>
> That said, you are only describing a case with 3 styles. If that's the
> case then the issue is why are you hitting
> the limit at all? (and the limit of 5 is protecting you). Are you actually
> creating classes with more than 5?
>
> Steve
>
> >>> Ludwig Max Brinckmann <ludwigbrinckmann at GMAIL.COM> 7/13/2006 10:53:12
> AM >>>
> I am using Mapserver through Primagis, which uses mapserver as rendering
> engine.
>
> I have a road network which I want to display at varying zoom levels in
> different ways, with the roads rendered by stacking styles on top of each
> other: eg. a wide black line on top of which comes a narrower yellow line
> on
> top of which comes a narrow black line, which overall gives the impression
> of a divided highway as we know it from paper maps.
>
> I do this at varying zoom levels, but then when rendering I get the
> message
>
> MapServerChildError: insertStyle(): Child array error. Maximum number of
> class styles, 5, has been reached
>
> which comes from classobject.c.
>
> Obviously, I can change this in map.h and recompile.
>
> But is there a good reason for such a low maximum? Is it there to protect
> people from their own errors or is there a significant performance penalty
> or some such?
>
>
> Ludwig
>



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Ludwig M Brinckmann
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