[mapserver-users] Passing a mapfile via CGI

[Brent Fraser]

Bob,

   What kinds of things are you trying to do with layers?  Are the 
layers vectors?  Maybe there's a different way...

I'm in the midst of an implementation where the vectors are held in 
PostGIS in three tables (point, line and polygon) and joined to a 
"feature definition" table (to supply rendering values).  I use one map 
file with three layers  (point, line, polygon) and pass a FILTER 
variable to get my different layers which are then rendered.

Here's a snippet from the polygon layer:

         CLASS
             STYLE # Polygon Fill
                 SYMBOL       [polyfill_symbol]
                 COLOR        [polyfill_fillcolor]
                 ANGLE        [polyfill_angle]
                 SIZE         [polyfill_hatchgap]  # e.g Hatching gap
                 WIDTH         1 # [polyfill_hatchthick]  # Hatching 
line thickness (column binding doesn't seem to work)
#                OPACITY      50 # [attribute]  # warning: there is no 
OPACITY for LABEL so don't bother.
             END
             STYLE # Polygon Outline
                 SYMBOL       [geom_symbol]
                 OUTLINECOLOR [geom_outcolor]
                 SIZE         [geom_width]    # for "simple" (?) symbols
                 WIDTH        [geom_width]    # for complex symbols
             END # Style
             TEXT             ([gid])
             LABEL
                 TYPE         TRUETYPE
                 FONT         [label_font]
                 ANTIALIAS    TRUE
                 COLOR        [label_fillcolor]
                 OUTLINECOLOR [label_outcolor]
                 BUFFER       1
                 POSITION     cc        # [ul|uc|ur|cl|cc|cr|ll|lc|lr|auto]
                 PARTIALS     TRUE
                 SIZE         [label_height]
             END  # LABEL

         END # class

While this method is suitable for rendering, it will be a problem if you 
want store variables for use in an identify operation (or maybe not; I 
wonder if a template name can be bound to a database column...)

Best Regards,
Brent Fraser


On 4/16/2012 10:22 AM, Bob Basques wrote:
>
> All,
>
>
> Did anything ever develop from this idea?  I need to generate a 
> variable length list of layers pro grammatically.
>
>
> I'm not finding anything from a quick search of things related to 
> passing a MAPFILE via the CGI call.  I want to be able to generate a 
> MAPFILE, or chunks of it, on the fly.  A possible solution (maybe 
> scary security wise) would be to use a param like "INCLUDE_<someID>=", 
> to pass in MAP fragments to an existing MAPFILE.  I need to 
> essentially add layers.
>
>
> Another thought I had (Ok, it's a bit odd, I'll admit . . .) would be 
> to have MapServer build it's own MAPFILE as a TEMPLATE output, but I'm 
> not coming up with a way immediately of passing the resulting MAPFILE 
> to Mapserver in the end.
>
>
> bobb
>
>
>
>
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