[mapserver-users] Re: Feature wish: Internal mapfile variables

[reholl]

I'm interested in working on capabilities along these lines.  Are there
existing RFCs that touch on this?  If not, perhaps one should be created.

This overlaps some configuration ideas I've been mulling over.  From the
original comment here about internal vars being handy for "/when the same
layers are re-used for several customers who like to have a bit different
styling for the same source data/" it occurs to me that a matrix or some
other constructs more complex than a flat list of internal variables might
be called for -- provided they don't turn the mapfile and internal mapserv
into spaghetti..

Jukka Rahkonen (have I ordered your name properly?), do you want to start an
RFC on this?

To anyone -- would this conversation typically migrate over to 'dev' ?

Robert Hollingsworth


I agree that this is a request that comes up often. As usual we'd just 
need someone to lead the effort.

On 11-10-03 12:12 AM, Rahkonen Jukka wrote:
> Hi,
>
> Inspired by the Thomas Bonfort's rendering chain I have been thinking if
> we could have a native support for using  internal mapfile variables.  Now
> Thomas is setting for example a bunch of colours in a definition file
> which is converted into a real mapfile with python script and c
> preprocessor.
> http://mapserver-utils.googlecode.com/svn/trunk/README
> http://mapserver-utils.googlecode.com/svn/trunk/generate_style.py
>
> I would like to see a simple way for setting the variables directly in the
> mapfile, somehow like
> MAP
> SET "pedestrian_clr"  "#fafaf5"
> SET "forest_clr" "#dcdcb4"
> SET "industrial_clr" "#ebe5d9"
> ....
>
> And then later in the layers use
> LAYER
> .....
> COLOR %pedestrian_clr%
>
> The internal variables could be interpreted only from the mapfile and they
> could not be altered by the web users.
>
> Internal variable would help in maintaining big mapfiles with repeating
> styles like in the OpenStreetMap rendering case.  Another use case is when
> the same layers are re-used for several customers who like to have a bit
> different styling for the same source data.
>
> -Jukka Rahkonen-
>

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