[mapserver-users] Polygon border with marker line symbol
Björn Danielsson
bjorn.danielsson at falubo.se
Thu Oct 12 03:02:36 PDT 2017
Hi,
Jukka R,
I would love to learn how to prevent polygon borders to be drawn twice.
Björn D
-----Original Message-----
From: "Rahkonen Jukka (MML)" <jukka.rahkonen at maanmittauslaitos.fi>
To: Anton Bakker <anton.bakker at geocat.net>, "lars.schylberg at blixtmail.se"
<lars.schylberg at blixtmail.se>
Cc: "mapserver-users at lists.osgeo.org" <mapserver-users at lists.osgeo.org>
Date: Thu, 12 Oct 2017 08:59:28 +0000
Subject: Re: [mapserver-users] Polygon border with marker line symbol
Hi,
I fear that you will run into another problem later because polygons are
closed rings and therefore common borders will be drawn two times. Because
of that rendering with sparse symbols may look ugly.
I would consider preprocessing the data so that you will have a clean line
data where duplicate sections of the borders have been removed for rendering
the borders and polygon layer for the rest.
-Jukka Rahkonen-
Lähettäjä:mapserver-users
[mailto:mapserver-users-bounces at lists.osgeo.org] PuolestaAnton Bakker
Lähetetty: 12. lokakuuta 2017 11:55
Vastaanottaja: lars.schylberg at blixtmail.se
Kopio: mapserver-users at lists.osgeo.org
Aihe: Re: [mapserver-users] Polygon border with marker line symbol
Hi Lars,
On second thought setting the TYPE to LINE does not fit my usecase exactly.
I would like to achieve the following for a polygon layer:
https://i.imgur.com/3stwHw4.png [https://i.imgur.com/3stwHw4.png] . So the
two requirements for the symbology are:
- Marker line symbol on border
- Polygon fill
With setting the type to line I can only achieve the marker line symbol, but
I cannot specify a fill: https://i.imgur.com/tk6vJ4b.png
[https://i.imgur.com/tk6vJ4b.png] . Do you know if there is a way of
achieving this effect?
I guess it maybe could be done by grouping two layers, together and treating
them as one, but preferably the solution is restricted to one layer.
Cheers,
Anton
On 12 Oct 2017, at 10:22, Anton Bakker <anton.bakker at geocat.net
[mailto:anton.bakker at geocat.net]> wrote:
Hi Lars,
The fill of the square was set to true, but I guess that is what happens
when you only set the OUTLINECOLOR and a SYMBOL on a polygon type style.
In any case setting the type of the polygon layer to LINE did the trick. I
was not aware this was possible, but it does make sense. Thanks for the
quick answer!
Kind regards,
Anton
On 11 Oct 2017, at 18:50, lars.schylberg at blixtmail.se
[mailto:lars.schylberg at blixtmail.se] wrote:
Hi,
I guess that your symbol definition of square says filled false, it should
be be filled true. Do another symbol.
Next thing is that if You would like to do fancy borders symbols along a
polygon you could set LAYER - TYPE to line.
The syntax becomes easier. Last thing is to get the symbols to rotate with
the line you should set gap to a negative value.
I made a small example to show this. Save this to line-with-squares.map and
run it with:
shp2img -m line-square-test.map -o line-square-test.png
/Lars S.
_________________
MAP
SIZE 1000 1000
IMAGETYPE png24
EXTENT -30 -10 60 30
UNITS DD
SYMBOL
NAME "square_filled"
TYPE VECTOR
POINTS
0 0
0 1
1 1
1 0
0 0
END
FILLED TRUE
END
LAYER # Simple polygon
STATUS DEFAULT
TYPE LINE
FEATURE
POINTS
5 25
25 20
45 20
35 15
50 0
0 5
5 25
END # Points
END # Feature
CLASS
NAME "Symboltest"
STYLE
SYMBOL "square_filled"
COLOR 255 0 0
SIZE 12
INITIALGAP 15
GAP -30
OUTLINECOLOR 0 0 0
WIDTH 2.0
END #STYLE
END # CLASS
END # LAYER
END # MAP
---------------------------
-----Originalmeddelande-----
Från: "Anton Bakker" <anton.bakker at geocat.net
[mailto:anton.bakker at geocat.net]>
Till: mapserver-users at lists.osgeo.org
[mailto:mapserver-users at lists.osgeo.org]
Datum: 2017-10-11 17:45
Ämne: [mapserver-users] Polygon border with marker line symbol
Hi list,
I am trying to create the following symbology in MapServer, a marker line
symbol on the border of a polygon, see the following ArcMap screenshot
(https://i.imgur.com/9qN16tx.png [https://i.imgur.com/9qN16tx.png]).
I tried the two following options, but could not manage to recreate the
above symbology:
1. Renders with marker fill on polygon (https://i.imgur.com/sFFznbq.png
[https://i.imgur.com/sFFznbq.png]):
CLASS
NAME "countries_europe"
STYLE
ANTIALIAS TRUE
COLOR 204 204 204
END
STYLE
ANTIALIAS TRUE
GAP 30
OUTLINECOLOR 0 0 0
COLOR 255 0 0
SIZE 6
SYMBOL 'square'
WIDTH 1.0
END
END
2. Renders with marker line symbol on polygon border
(https://i.imgur.com/Qwrw8wP.png [https://i.imgur.com/Qwrw8wP.png]), but the
marker is missing the fill:
CLASS
NAME "countries_europe"
STYLE
ANTIALIAS TRUE
COLOR 204 204 204
END
STYLE
ANTIALIAS TRUE
GAP 30
OUTLINECOLOR 0 0 0
SIZE 6
SYMBOL 'square'
WIDTH 1.0
END
END
Does anyone know whether it is possible to achieve this symbology? It seems
the only way to set a picture line symbol on the border of a polygon is to
only set the outlinecolor, but then there is no way to set the fill color
for the marker. I could not find any any information about this in the
documentation or the mailing list.
Thanks and kind regards,
Anton Bakker
software developer at geocat [http://www.geocat.net/]
tel. +31 318 416 664
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