Niels-Peter,
I believe that you will need to split the line at the intersection into
multiple lines to get the display that you want. Because you line just
crosses itself there is no intersection there. If you split the line
into multiple segments that there will be an intersection and mapserver
should render it is desired.
-Steve W
On 5/11/2011 8:18 AM, Niels-Peter Jensen wrote:
Hi Thomas
The bridge was used as an anology. In fact, the line feature is a bus route
that crosses itself, and we just want to show where the route passes through
an intersection.
Niels-Peter
-----Oprindelig meddelelse-----
Fra: thomas bonfort [mailto:[email protected]]
Sendt: 11. maj 2011 13:56
Til: Niels-Peter Jensen
Emne: Re: [mapserver-users] Rendering line crossing iteslf
On Wed, May 11, 2011 at 13:51, Niels-Peter Jensen<[email protected]> wrote:
Hi Thomas
Thanks for the quick answer.
We cannot make the style work in the mapfile and have to place it in
the symbol file. By the way, we are using Mapserver 5.4.2.
But anyway, I don't think it solves our problem.
We don't have any "bridge" in our line data, it is just a single line
feature that crosses itself.
then how can you distinguish the case of the bridge with the case of the
intersection ? applying the solution I proposed on all lines will give
incorrect cases everywhere you don't have a bridge, so it would not be a
possible solution.
--
thomas
Regards
Niels-Peter
-----Oprindelig meddelelse-----
Fra: thomas bonfort [mailto:[email protected]]
Sendt: 11. maj 2011 12:14
Til: Niels-Peter Jensen
Cc: [email protected]
Emne: Re: [mapserver-users] Rendering line crossing iteslf
An undocumented and "not guaranteed to work in future versions" is to
trick mapserver in not drawing the cached base style for bridge lines.
As you are avoiding the line caching mechanism, you have to tweak the
linecaps for the base style.
CLASS
EXPRESSION ([bridge]=1)
STYLE
END
STYLE
color black
width 5
linecap butt
END
STYLE
color yellow
width 3
linecap round
END
STYLE
color black
width 1
END
END
I haven't tested this recently, so please keep in touch if this solves
your problem or not.
regards,
thomas
On Wed, May 11, 2011 at 11:40, Niels-Peter Jensen<[email protected]>
wrote:
Hi users
We have a problem in rendering a route based on a line feature.
When we use the common way to do that, by using two styles, with a
thick black line that defines an outline, and a thinner defying the
road center, we will not get the desired result.
But I want to show where routes cross ("bridge" intersection), and
not as a "normal" intersection, see the attached examples.
As there is no outline definition on linefeatures I can't se how that
can be done in a simple way.
Niels-Peter
I-GIS
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