[Mapserver-dev] Additional Map Keywords

[Yewondwossen Assefa]

Frank Warmerdam wrote:
> Folks,
> 
> I would like to add a few additional keywords to the map file for 
> controlling
> configuration information at runtime without environment variables.  In
> particular, I have in mind:
> 
> PROJ_LIB "<directory with PROJ.4 support files>"
> CPL_CONFIG_OPTION "name" "value"
> 
> The PROJ_LIB is pretty much self explanatory.  The CPL_CONFIG_OPTION can be
> used to control various things in GDAL and OGR.  For instance, setting the
> GDAL_DATA CPL_CONFIG_OPTION would set the directory for GDAL to look in for
> supporting data files (such as pcs.csv).  Some OGR drivers have behaviour
> modified by CPL_CONFIG_OPTIONS, some GDAL issues like caching memory can
> be controlled this way, and some GDAL drivers (such as DODS) can also be
> influenced by configuration options.
> 
> My thinking is that these would be global options (in the mapObj), as they
> can't easily be restricted to invidual layers due to the way they work
> internally.
> 
> If we are really lucky this will forstall some of the requests for new
> versions of mapserver compiled with different PROJ_LIB values, or questions
> about how to set environment variables in different environments.
> 
> Any ideas of other similar config options we should offer?  Does the 
> general
> approach seem OK?
> 

  Could this mecanism be used to control some of the MAX_XXX (like 
maximum number of layers) used in Mapserver ? I think  if it does It 
could really be benefical to several perople.


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Assefa Yewondwossen
Software Analyst

Email: assefa at dmsolutions.ca
http://www.dmsolutions.ca/

Phone: (613) 565-5056 (ext 14)
Fax:   (613) 565-0925
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