[mapserver-users] RE: How to avoid drawing overlapping point symbols?

[Sigda, Mark - Fort Collins, CO]

Option 1 works great (just had to remove "FONT" after "LABEL).  "COLOR 0 0 0" wasn't needed.

Thanks Steve!!

> -----Original Message-----
> From: Lime, Steve D (DNR) [mailto:Steve.Lime at state.mn.us]
> Sent: Wednesday, May 05, 2010 4:00 PM
> To: Sigda, Mark - Fort Collins, CO; mapserver-users at lists.osgeo.org
> Subject: RE: How to avoid drawing overlapping point symbols?
> 
> Hi Mark: There are a couple of ways to go. Either should work. Option 1
> is less of hack I so I'd start there. Option 2 is really more useful
> when you want to label the marker.
> 
> Steve
> 
> Option 1: TrueType symbol as text.
> 
> LAYER
>   NAME 'option1'
>   DATA ...
>   TYPE ANNOTATION
>   CLASS
>     COLOR 0 0 0 # may need this for things to draw, or you may not
>     TEXT ',' # no need for a label item, this is references the symbol
> in your font you want to use
>     LABEL
>       FONT
>         TYPE TRUETYPE
>         FONT "nrcs-ssurgo"
>         ANTIALIAS TRUE
>         SIZE 10
>     END
>   END
> END
> 
> Option 2: Use a marker symbol
> 
> SYMBOL
>         NAME "ROC"
>         TYPE TRUETYPE
>         FONT "nrcs-ssurgo"
>         CHARACTER ","
>         ANTIALIAS TRUE
> END
> 
> LAYER
>       NAME "option2"
>       STATUS ON
>       TYPE ANNOTATION
>       DATA ...
>       CLASS
>         STYLE
>             SYMBOL "ROC"
>             SIZE 12
>             COLOR 0 0 0
>         END
>         TEXT ' ' # a blank space
>         LABEL
>            SIZE tiny # doesn't matter what you define
>         END
>       END
> END
> 
> 
> ________________________________________
> From: Sigda, Mark - Fort Collins, CO [Mark.Sigda at ftc.usda.gov]
> Sent: Tuesday, May 04, 2010 1:51 PM
> To: Lime, Steve D (DNR); mapserver-users at lists.osgeo.org
> Subject: RE: How to avoid drawing overlapping point symbols?
> 
> Thank you, Steve.  I'm trying annotation, but haven't been able to get
> it working yet.  I wasn't able to find examples of annotation layers,
> so I'm just hacking here.  Would you please take a look at my map file?
> 
> Below is basically what I'm doing (though I have many more symbols &
> classes).  If I use the map file below, it draws nothing.  If I
> uncomment the commented lines, it draws both the marker symbols and
> labels, but I don't want labels.
> 
> Can you tell me how to draw just the marker symbols?
> 
> Thanks,
> 
> -Mark
> 
> 
> SYMBOL
>         NAME "ROC"
>         TYPE TRUETYPE
>         FONT "nrcs-ssurgo"
>         CHARACTER ","
>         ANTIALIAS TRUE
> END
> 
> LAYER
>       NAME "featpoint"
>       STATUS ON
>       TYPE ANNOTATION
>       CONNECTIONTYPE PLUGIN
>       PLUGIN "msplugin_mssql2008.dll"
>       CONNECTION "removed"
>       DATA "ShapeGeometry from featpoint using unique featpointiid
> using SRID=4269"
>       PROJECTION 'init=C:\ms4w\proj\nad\epsg:4269' END
>       CLASSITEM "featsym"
>       TRANSPARENCY ALPHA
> #      LABELITEM "featsym"
>       CLASS
>         EXPRESSION 'ROC'
>         STYLE
>             SYMBOL "ROC"
>             SIZE 12
>           COLOR 0 0 0
>           END
> #        LABEL
> #          ANTIALIAS true
> #          POSITION AUTO
> #          FONT "arial"
> #          TYPE truetype
> #          COLOR 0 0 0
> #          SIZE 8
> #        END
>       END
> END
> 
> -----Original Message-----
> From: Lime, Steve D (DNR) [mailto:Steve.Lime at state.mn.us]
> Sent: Monday, May 03, 2010 2:45 PM
> To: Sigda, Mark - Fort Collins, CO; mapserver-users at lists.osgeo.org
> Subject: RE: How to avoid drawing overlapping point symbols?
> 
> Use an annotation layer, you can even use the truetype symbol as the
> text, collisions will be avoided in this case. Even if you have to use
> the truetype symbol as a marker symbol with accompanying text MapServer
> will still avoid overlap with the markers.
> 
> Steve
> ________________________________________
> From: mapserver-users-bounces at lists.osgeo.org [mapserver-users-
> bounces at lists.osgeo.org] On Behalf Of Sigda, Mark - Fort Collins, CO
> [Mark.Sigda at ftc.usda.gov]
> Sent: Monday, May 03, 2010 2:52 PM
> To: mapserver-users at lists.osgeo.org
> Subject: [mapserver-users] How to avoid drawing overlapping point
> symbols?
> 
> I have a point layer I'm drawing with a truetype symbol.  When points
> are close together, a big mess of overlapping symbols is drawn.
> 
> How can I tell MapServer not do draw symbols for points that are close
> together?  I'm looking for something like GAP on the STYLE element, but
> that apparently applies only to line features.
> 
> Thanks,
> 
> -Mark
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