AW: AW: Re: [mapserver-dev] Ok, one more labeling sample...

[SUSANNE]

The picture is a snap-shot from mapserver display; I am using Mapserver 5.2
with ka-map. 
In my opinion the labels are created with parameters of map-file laying over
a common orthofoto with ecw format.
I helped myself setting a rectangle around the label (BACKGROUNDCOLOR 200
200 200); but it would look much better having only tansparent annotation.
Thank you, Susanne

Thank you Steve for your answer:

How is this picture generated? Looks to me like you're overlaying a
transparent image over a background image in some other tool. You're seen
antialiasing effects then and how/if you can fix them really depends. You
should take this question to the main mapserver mailing list or the mailing
list for the tool you're doing the overlay in for more discussion.

Steve


SUSANNE wrote:
> 
> Dear Steve!
> 
> In my opinion I need outlinecolor for using the polygon as polyline and
> hoped not to disturb the label-display. Furthermore my outlinecolor is
> pink
> and not white as the "shadow" around label is showing -picture attached.
> 
> Here is the signifanct part of my map-file:
> 
> LAYER
>    NAME Kataster_region
>    GROUP Kataster
>    STATUS OFF
>    MAXSCALE 300000
>    TYPE POLYGON
>    DATA 'd:/ewald/Kataster_OOE/45416GST'
>    LABELITEM 'GNR'
>    CLASS
>       STYLE
>          OUTLINECOLOR 255 0 255
>          WIDTH 1
>       END
>       LABEL
>          TYPE TRUETYPE
>          FONT 'sans'
>          SIZE 8
>          POSITION cc
>          Color 0 0 0
>       END
>    END
>    TEMPLATE 'dummy.html'
> END
> 
> Thanks for your reply, Susanne
> 
> -----Ursprüngliche Nachricht-----
> Von: Steve Lime [mailto:Steve.Lime at dnr.state.mn.us] 
> Gesendet: Donnerstag, 18. September 2008 16:08
> An: susanne.kalliany at tefis.at
> Betreff: Re: AW: Re: [mapserver-dev] Ok, one more labeling sample...
> 
> Remove the label OUTLINECOLOR, that's all there is to it.
> 
> Steve
> 
>>>> "DI. Susanne Kalliany" <susanne.kalliany at tefis.at> 09/18/08 3:47 AM
>>>>
> Dear Steve and mapserver-community!
> 
> I am tracking your labelling discussion with much interest, but my
> current
> (small) "problem" is a different one in that context:
> 
> How can I get rid of the white "shadows" accompanying all letters ?
> In that particular worldmap example they are very useful, but with my
> application they are giving a bit a confusing impression.
> 
> Any useful hint would be much appreciated, many thanks in advance
> 
> Susanne
> 
> -----Ursprüngliche Nachricht-----
> Von: mapserver-dev-bounces at lists.osgeo.org
> [mailto:mapserver-dev-bounces at lists.osgeo.org] Im Auftrag von Steve Lime
> Gesendet: Donnerstag, 18. September 2008 00:43
> An: mapserver-dev at lists.osgeo.org
> Betreff: [?? Probable Spam] Re: [mapserver-dev] Ok, one more labeling
> sample...
> 
> Here are world countries before and after. Note we can cram on more
> labels
> with better placement, imagine that...
> 
> Steve
> 
>>>> "Steve Lime" <Steve.Lime at dnr.state.mn.us> 09/17/08 5:37 PM >>>
> As I putzed with the polygon label point code I realized that the line
> intersection and centering was screwing up some optimal placements based
> solely on the center of gravity computation. You really only want to go
> to
> that extreme if 1) the CoG is outside the polygon or 2) it's near the
> edge
> of the polygon. So, I've accounted for those and added a switch that
> centers
> the label on the either a vertical or horizontal line depending on the
> CoG
> departure from the bbox center point.
> 
> Anyway the algorithm looks like so:
> 
> 1) compute CoG of largest (in terms of area) outer ring
> 2) if that point falls within the polygon
>   a) compute shortest distance to polygon
>   b) if distance is greater than 10% of largest bbox dimension then
> quit,
> your done
>   c) if not, then point is near an edge go to step 3)
> 3) intersect a vertical or horizontal line with the polygon and the CoG
> and
> find the longest segment, using the mid-point of that segment as the
> label
> point
> 
> With the U.S. states shapefile 9 polygons (e.g. FL, LA) are close to the
> edge and fall through to step 3. Not sure what the right value is there.
> The
> results are quite nice however. I've attached images from this method
> and
> the current 5.2 output. Again, I can supply a patch if anyone would like
> to
> try it. I'll supply before and after for a few of the test datasets
> folks
> sent in separate messages.
> 
> Steve
> 
> 
> 
>  
> _______________________________________________
> mapserver-dev mailing list
> mapserver-dev at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/mapserver-dev
> 
> 

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