Mapfile - 50 Layers Maximum ?

[Stephen Woodbridge]

James Net wrote:
> Sorry to butt in, but does changing the max limit in "map.h" (to say 
> 1000) and then recompiling have any effect on the speed / efficiency of 
> mapserver if you have have a map file wth only 1 - 5 layers?

I should not effect speed, but it does effect memory consumed as the 
number of layers is staticly allocated. This might indirectly effect 
speed but making less memory available for system buffers, but probably not.

-Steve W.

>> From: Stephen Woodbridge <woodbri at SWOODBRIDGE.COM>
>> Reply-To: Stephen Woodbridge <woodbri at SWOODBRIDGE.COM>
>> To: MAPSERVER-USERS at LISTS.UMN.EDU
>> Subject: Re: [UMN_MAPSERVER-USERS] Mapfile - 50 Layers Maximum ?
>> Date: Fri, 13 Jan 2006 13:09:51 -0500
>>
>> Randy,
>>
>> The limit is set in map.h
>> You can change the limit and recompile
>> More resent version have a higher limit I think, but I'm not sure what.
>>
>> -Steve W.
>>
>> Randy How wrote:
>>
>>>  Greetings,
>>>  I've come across this rumor/fact, that there is a maximum of 50 
>>> layers in a
>>> map file.  Unknowingly  I was experimenting the use of MapServer for 
>>> QC'ing
>>> a project, that I put in 2,500 layers into a mapfile.  Yes, not 
>>> surprisingly
>>> MapServer baucked about this.  Then the first question is what is the 
>>> limit,
>>> then I found out that it was 50!
>>>  I looked in to an existing mapfile that we have and it has 45 
>>> layers.  These
>>> layers are represented at different scales, and/or by spatial reference
>>> (i.e. Indices for different UTM zones), then a watermark.
>>>  We are moving into more global datasets which may be represented the 
>>> same
>>> way.  There's 60 UTM zones.  So the 50 layer limit is going to be a 
>>> problem
>>> in the short term.
>>>  Can anyone verify this fact?  And is there a work around in place to
>>> accomplish these needs?
>>>  Thanks, Randy  ________________________________________________
>>> Randy How
>>>
>>> Geospatial Applications Developer
>>> Voice: +1-970-482-4400
>>> Fax: +1-970-482-4499
>>> Web: http://www.i3.com/
>>>
>>> i-cubed
>>> 201 Linden, Third Floor
>>> Fort Collins, CO 80524
>>>
> 
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