[mapserver-users] labels for pie|bar charts
Lime, Steve D (MNIT)
steve.lime at state.mn.us
Thu Aug 1 16:32:01 PDT 2019
MapServer now supports multiple labels per feature so perhaps it’s a reasonable addition. Will take a peek...
________________________________
From: Nicol Hermann <mapserver at geoworld.de>
Sent: Thursday, August 1, 2019 1:37:13 PM
To: Lime, Steve D (MNIT) <steve.lime at state.mn.us>; mapserver-users at lists.osgeo.org <mapserver-users at lists.osgeo.org>
Subject: Re: [mapserver-users] labels for pie|bar charts
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Thanks Steve!
Yes, correct. Labeling slices was not possible back then as well.
The annotation layer was kind of a workaround.
Will give it a try with your code snippet.
Thanks
Nicol
Am Donnerstag, den 01.08.2019, 18:29 +0000 schrieb Lime, Steve D
(MNIT):
> You weren't labeling slices with PHP from the looks of it, just the
> underlying feature using an annotation layer. So setting up a layer
> to behave like an annotation layer is doable... Here's a simple
> snippet for the state of Minnesota polygon:
>
> LAYER
> NAME bdry_statepy2
> STATUS DEFAULT
> TYPE POLYGON
> DATA ' bdry_statepy2'
> CLASS
> LABEL
> TEXT 'Minnesota'
> POSITION CC
> SIZE LARGE
> COLOR 0 0 0
> END
> END
> END
>
> Basically using a class with no styles.
>
> I don't recall the individual chart components (pies, bars, etc...)
> as being labelable. It's not covered in the docs or the original RFC.
> I will whip up a test case to confirm the behavior though.
>
> --Steve
>
> -----Original Message-----
> From: Nicol Hermann [mailto:mapserver at geoworld.de]
> Sent: Thursday, August 01, 2019 12:33 PM
> To: Lime, Steve D (MNIT) <steve.lime at state.mn.us>;
> mapserver-users at lists.osgeo.org
> Subject: Re: [mapserver-users] labels for pie|bar charts
>
> This message may be from an external email source.
> Do not select links or open attachments unless verified. Report all
> suspicious emails to Minnesota IT Services Security Operations
> Center.
>
>
>
> Hello Steve,
>
> you are right. With older versions of Mapserver I used 2 layers.
> One for the chart (type=chart) and the other one to do the labeling
> (type=annotation).
> I used PHP Mapscript at that time. See the code snippet for the
> annotation layer below. It uses the same data source like the
> chartlayer.
>
> $layer = ms_newLayerObj($Map);
> $layer -> set('status', MS_ON);
> $layer -> set('labelcache', MS_ON);
> $layer -> set('type', MS_LAYER_ANNOTATION );
> $layer -> set('data', $datapath);
> $layer -> set('status', MS_ON);
> $poClass = ms_newClassObj($layer);
> $poClass-> set("name", "Beschrifung " );
> $felder= '(';
> foreach( $chartLayer['fieldlist'] as $feld ){
> $felder .= sprintf('%s = [%s]-', $feld, $feld);
> }
> $felder .=sprintf(')');
> $poClass->settext($layer, "$felder");
> $poClass-> label -> set('font', "arial");
> $poClass-> label -> set('type', MS_TRUETYPE);
> $poClass-> label -> set('size', 8);
> $poClass-> label -> set('antialias', MS_TRUE);
> $poClass-> label -> color -> setRGB ( 0, 0, 0 );
> $poClass-> label -> set ('wrap', 0x2d); // use '-' to do a line break
> $poClass-> label ->set('position', MS_AUTO);
> $poClass-> label ->set('partials', MS_FALSE);
> $poClass-> label ->backgroundcolor->setRGB('240','240','240');
>
> Unfortunately this approach do not work anymore as the annotation
> type
> is not longer supported.
>
> The MapFile which I am trying currently looks like this:
>
> LAYER
> DATA
> "/home/nicol/public_html/geoworld/gw2_1und1/data/brd/media.shp"
> LABELITEM "NAME"
> NAME "Staedtecharts"
> PROJECTION
> "init=epsg:4326"
> END # PROJECTION
> STATUS DEFAULT
> TYPE CHART
> # PROCESSING "CHART_SIZE_RANGE=bevzahl"
> # PROCESSING "CHART_SIZE=130" # Fixe Groesse
> PROCESSING "CHART_TYPE=pie" # pie, bar
> PROCESSING "CHART_SIZE_RANGE = itemname minsize maxsize minval
> maxval exponent"
> PROCESSING "CHART_SIZE_RANGE=bevzahl 30 300 100000 2000000"
> LABELITEM "NAME"
> UNITS DD
> CLASS
> NAME "Maennlich"
> TEXT 'Hallo'
> LABEL
> FONT "arial"
> SIZE 30
> COLOR 255 0 0
> ENCODING "UTF-8"
> MINFEATURESIZE AUTO
> OFFSET 0 0
> POSITION AUTO
> SHADOWSIZE 1 1
> END # LABEL
> STYLE
> COLOR 192 192 192
> OUTLINECOLOR 0 0 0
> SIZE [mann]
> END # STYLE
> END # CLASS
> CLASS
> NAME "Weiblich"
> STYLE
> SIZE [frau]
> COLOR 255 255 0
> OUTLINECOLOR 0 0 0
> END
> END
> END # LAYER
>
>
> My hope was that the chart type now also takes care of the labeling.
>
> Any idea how to realize the labeling for the individual slices now?
>
> Thanks
> Nicol
>
>
> Am Donnerstag, den 01.08.2019, 14:34 +0000 schrieb Lime, Steve D
> (MNIT):
> > Hi Nicol: Do you you have a sample mapfile that showed your
> > approach?
> > Since CHART and ANNOTATION are both layer types that implies
> > multiple
> > layers. --Steve
> >
> > -----Original Message-----
> > From: mapserver-users [mailto:
> > mapserver-users-bounces at lists.osgeo.org
> > ] On Behalf Of Nicol Hermann
> > Sent: Wednesday, July 31, 2019 2:52 PM
> > To: mapserver-users at lists.osgeo.org
> > Subject: [mapserver-users] labels for pie|bar charts
> >
> > This message may be from an external email source.
> > Do not select links or open attachments unless verified. Report all
> > suspicious emails to Minnesota IT Services Security Operations
> > Center.
> >
> >
> >
> > Hello,
> >
> > I am trying to understand how labeling/annotation with layer type
> > 'chart' for the individual slices e.g. of a PIE/BAR chart would
> > work
> > (
> > https://gcc01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fmapserver.org%2Foutput%2Fdynamic_charting.html&data=02%7C01%7Csteve.lime%40state.mn.us%7Ccace70b998234f92de2c08d716af1ff6%7Ceb14b04624c445198f26b89c2159828c%7C0%7C1%7C637002813718604608&sdata=JvGoeC2vO3kV5lqINPV%2Fk%2B98er56HGVlKy2uQXVHKa0%3D&reserved=0).
> > I have tried to set a LABELITEM on layer level, a LABEL block
> > within
> > the CLASS section, a TEXT property in the CLASS block but none of
> > my
> > attempts show any labels.
> > In earlier versions of Mapserver I have used the ANNOTATION layer
> > type
> > to get labels but this type is now deprecated for 7.x versions.
> > Any ideas?
> > Thank you very much.
> >
> > Nicol
> >
> > _______________________________________________
> > mapserver-users mailing list
> > mapserver-users at lists.osgeo.org
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