[mapserver-users] Legend graphic output: Nested.

[Lime, Steve D (MNIT)]

You might be able to lay it out as a map (using a mapfile) with a bunch of inline features that you could assign symbols (could be calls to MapServer to get legend icons since a SYMBOL can be a URL) and labels.

The problem is that if this needs to be really dynamic (different layers show/hide) then I think you’d have to lay things out using other tools – MapScript, ImageMagik or something else along those line. MapScript could probably automate much of the layout as a map/mapfile programmatically.

--Steve

From: mapserver-users [mailto:mapserver-users-bounces at lists.osgeo.org] On Behalf Of Basques, Bob (CI-StPaul)
Sent: Thursday, December 14, 2017 10:00 AM
To: mapserver-users at lists.osgeo.org
Subject: [mapserver-users] Legend graphic output: Nested.

Anbyone have any ideas on how to output a nested, or indented legend graphic (as a raster image?)?


Looking for something like this:

Storm
— Fitting (blue)
— Catchbasin (blue)
— Manhole (blue)
— Forcemain (blue)
— Storm Pipe (blue)
Storm, Private
— Fitting (lightblue)
— Catchbasin (lightblue)
— Manhole (lightblue)
— Forcemain (lightblue)
— Storm Pipe (lightblue)
Storm, Saint Paul
— Fitting (purple)
— Catchbasin (purple)
— Manhole (purple)
— Forcemain (purple)
— Storm Pipe (purple)
etc.


Each of the sub list items are a separate layer in the MAPFILE, and the Main headings, would be used to filter on.  Do all 15 layers above need to be defined in order to get a line in the legend to appear.  This is just an example BTW, I have many more main headings to contend with.  I guess it comes down to, how do I grab the filter item and insert it into the Legend graphic, and probably along with the color assignment as well.  Maybe I’m thinking about this backwards.  I could pass in the color along with the main heading filter . . . but how to get a composite legend.  Maybe it needs to be three (or more) different calls.
. . . .

A simpler description of the need, is to display a seamless Sewer network with color coded ownership, but using the same cartography for each sub-heading.  Hmm, maybe an INCLUDE . . .

It feels like a Monday today for some reason . . . .  :c)


bobb



We learn from history that we do not learn from history.
   ~ George Wilhelm Hegel



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