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<font face="Comic Sans MS" size="3">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.</font> </p>
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<font face="Comic Sans MS" size="3">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.</font> </p>
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<font face="Comic Sans MS" size="3">bobb</font> </p>
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>>> Brent Fraser <bfraser@geoanalytic.com> wrote:<br> </p>
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Bob,<br><br> What kinds of things are you trying to do with layers? Are the layers vectors? Maybe there's a different way...<br><br>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. <br><br>Here's a snippet from the polygon layer:<br><br><tt> CLASS<br> STYLE # Polygon Fill<br> SYMBOL [polyfill_symbol]<br> COLOR [polyfill_fillcolor]<br> ANGLE [polyfill_angle]<br> SIZE [polyfill_hatchgap] # e.g Hatching gap<br> WIDTH 1 # [polyfill_hatchthick] # Hatching line thickness (column binding doesn't seem to work) <br># OPACITY 50 # [attribute] # warning: there is no OPACITY for LABEL so don't bother.<br> END<br> STYLE # Polygon Outline<br> SYMBOL [geom_symbol]<br> OUTLINECOLOR [geom_outcolor]<br> SIZE [geom_width] # for "simple" (?) symbols<br> WIDTH [geom_width] # for complex symbols<br> END # Style<br> TEXT ([gid])<br> LABEL<br> TYPE TRUETYPE<br> FONT [label_font]<br> ANTIALIAS TRUE<br> COLOR [label_fillcolor]<br> OUTLINECOLOR [label_outcolor]<br> BUFFER 1<br> POSITION cc # [ul|uc|ur|cl|cc|cr|ll|lc|lr|auto]<br> PARTIALS TRUE<br> SIZE [label_height]<br> END # LABEL<br><br> END # clas</tt>s<br><br>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...)<br> </p>
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Best Regards,</p>
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Brent Fraser</p>
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On 4/16/2012 10:22 AM, Bob Basques wrote: </p>
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<font size="3" face="Comic
Sans MS">All,</font> </p>
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<font size="3" face="Comic
Sans MS">Did anything ever develop from this idea? I need to generate a variable length list of layers pro grammatically.</font> </p>
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<font size="3" face="Comic
Sans MS">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 "</font><font size="3" face="Courier">INCLUDE_<someID>=</font><font size="3" face="Comic Sans MS">", to pass in MAP fragments to an existing MAPFILE. I need to essentially add layers.</font> </p>
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<font size="3" face="Comic
Sans MS">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.</font> </p>
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<font size="3" face="Comic
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