[Mapserver-users] Legend templates, classes and lines...

[Jean-Francois.Doyon at CCRS.NRCan.gc.ca]

Steve,

Hmmm, well the loop counter is definitely a possibility, though you will
notice that there is a class index value used in the generation of the
filename for the class symbol, and it DOES increase ... (Just look at the
filenames, you'll see a _0_ , _1_ , _2_ and so on for symbols of different
classes within one layer).

You know what I think I just noticed? All of our maps that use lines use
different line styles and color for each class (At least so far as I can
tell) ... this would explain why we never notied this.

A couple of things to look at: Does it happen with the GIF legend? If not, I
would suggest you try different line styles within that same layer for each
class, see if suddenly the colors come out right ... That'll at least give
you a good indication of where to look for the problem (which will be in the
code!).

I suppose that could yet be with some other counter ... I would be more
inclined to suspect a pointer problem in this case.

J.F.

-----Original Message-----
From: Steve Lime [mailto:steve.lime at dnr.state.mn.us]
Sent: Tuesday, June 24, 2003 4:15 PM
To: Jean-Francois.Doyon at ccrs.nrcan.gc.ca;
mapserver-users at lists.gis.umn.edu
Subject: RE: [Mapserver-users] Legend templates, classes and lines...


J.F. - I verified that the 3 files are indeed the same. I'll paste the
layer definition below but it's pretty straight forward. Only thing I
can think of is a stuck loop counter someplace. I'll try using a STYLE
instead of just a COLOR and see if that helps.

Steve

  #
  # Railroad Rights-of-Way Prairies
  #
  LAYER
    NAME mnrrpln3
    METADATA
      "TITLE" "Railroad Rights-of-Way Prairies"
    END
    MAXSCALE 500000
    SYMBOLSCALE 200000
    STATUS OFF
    DATA shapefiles/heritage/mnrrpln3
    TYPE line
    CLASSITEM 'quality'
    CLASS
      NAME 'Very Good'
      EXPRESSION 'Very Good'
      SYMBOL 'circle'
      COLOR 255 0 0
      SIZE 2
      MAXSIZE 3
      MINSIZE 1
    END
    CLASS
      NAME 'Good'
      EXPRESSION 'Good'
      SYMBOL 'circle'
      COLOR 255 125 33
      SIZE 2
      MAXSIZE 3
      MINSIZE 1
    END
    CLASS
      NAME 'Fair'
      EXPRESSION 'Fair'
      SYMBOL 'circle'
      COLOR 255 211 23
      SIZE 2
      MAXSIZE 3
      MINSIZE 1
    END
  END # mnrrpln3

>>> <Jean-Francois.Doyon at CCRS.NRCan.gc.ca> 06/24/03 01:02PM >>>
Steve,

Hmmm, as you know we use HTML legends extensively, and as of yet I've
never
heard of anybody running into this kind of problem in our shop.

It's a pretty simple legend template too, not much room for error.

Also the page output suggests MapServer DID indeed render 3 different
icons
for each of the classes.

I would try looking at the caching features of MapServer ... Maybe it's
not
overwriting previous icons? Clear the temp directory or something like
that?

Maybe you could send the mapfile along to see if there's anything weird
in
there? Otherwise, I'm afraid you'll have to look in the code!

Good luck!

J.F.

-----Original Message-----
From: Steve Lime [mailto:steve.lime at dnr.state.mn.us] 
Sent: Tuesday, June 24, 2003 1:48 PM
To: mapserver-users at lists.gis.umn.edu 
Subject: [Mapserver-users] Legend templates, classes and lines...


Hi Folks: I'm using 4.0 and wondered if anyone else has run into
problems with legend templates with LINE layers and multiple classes.
Check out the following URL:

 
http://maps.dnr.state.mn.us/cgi-bin/mapserv40?mapserv=http%3A//maps.dnr.stat

e.mn.us/cgi-bin/mapserv40&map_status=on&mapsize=800+750&map=LANDVIEW_HERITAG
E_MAPFILE&template=/usr/local/www/docs/landview/heritage/templates/print.htm
l&mapext=316287.17433148284+4891207.862044461+342298.221100423+4910705.97065
5294&layers=mnrrpln3+mnnpcpy3+mnsbspy3+lakes+ctybdln2+doq03im4

It's a "print" layout and uses the legend template functionality. The
problem is that the line legend for the "Railroad Rights-of-Way
Praries"
ain't right. The 3 classes should be red, yellow and orange (as in the
map) and not all red. The polygon layer below it ("Sites of
Biodiversity
Significance") works as expected. Before I run to the source code I
want
to make sure I'm not doing anything stupid. The legend template is
included below.

Steve
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