[mapserver-users] Passing a mapfile via CGI

[Brent Fraser]

I guess my solution would be to put the trails in a PostGIS table:

Trails:
id    name    geometry
1    trail A    234523452345
2    trail B    5879567876454

Use one map file with a FILTER "name='%trail_name%'".  Now use 
http://.../mapserv?trail_name="trail A" to have mapserver do the 
variable substitution in the mapfile.

The bigger problem is generating the GUI layer list with the pointers to 
the mapserver URLs.  A script/database generated mapbook in GeoMoose, or 
JavaScript list for use with OpenLayers, etc...

Best Regards,
Brent Fraser


On 4/16/2012 1:41 PM, Bob Basques wrote:
>
> Individual trails, one layer per GPS to allow user control of visibility.
>
>
> bobb
>
>
>
>
> >>> Brent Fraser <bfraser at geoanalytic.com> wrote:
>
> Well, in this application I don't care about a feature's real-world 
> attributes (only the  geometry and their feature "class"), so I'm able 
> to pack all polygons into one table.  I then join the polygon table to 
> the feature class table to get the color, etc.
>
> Are you representing each GPS trail as a separate layer?  So the user 
> can turn individual trail on/off in a layer control?
>
> Best Regards,
>
>
>            
>
> Brent Fraser
>
>
>
> On 4/16/2012 1:07 PM, Bob Basques wrote:
>
>> Hmm, interesting apporach, reminds me of my ealier days with Oracle 
>> (before Oracle Spatial, where each feature type needed it's own table 
>> structure . . .  Have to do some more thinking on this one.
>>
>>
>> I'm trying to render a predefined list of layers (from the user) of a 
>> set of GPS trails that are BEGIN  and END indexed.
>>
>>
>> bobb
>>
>>
>>
>>
>> >>> Brent Fraser <bfraser at geoanalytic.com> wrote:
>>
>> 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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