Mapfile - 50 Layers Maximum ?

James Net james_marsnett at HOTMAIL.COM
Fri Jan 13 20:36:21 EST 2006


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?



>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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