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 <bfra...@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
_______________________________________________
mapserver-users mailing list
mapserver-users@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/mapserver-users
_______________________________________________
mapserver-users mailing list
mapserver-users@lists.osgeo.org
http://lists.osgeo.org/mailman/listinfo/mapserver-users
