[mapserver-users] Adding symbols on top of polyline elements

[Adrian Popa]

Can you please clarify to me what you mean by data that is oriented? 
When I built the road layer from GPS data, I added polylines starting 
from point A->...->B and recorded all the inflections in the road 
between A and B.
By ordered data you mean the direction in this case is A->B?
If I wanted to reverse the direction I'd have to write the data to the 
shapefile in the order B->A?

Thanks

thomas bonfort wrote:
> it's the direction of the underlying geometry that's used.
> so you either need
> * data that's oriented, and a single boolean filed indicating if its
> oneway or not,
> * or an unoriented geometry, and a field indicating if the oneway
> direction is reversed or not wrt the geometry (and two directional
> symbols, one with > , the other with <)
>
> cheers,
> thomas
>
> On Mon, Nov 10, 2008 at 12:01, Adrian Popa <adrian_gh.popa at romtelecom.ro> wrote:
>   
>> Hello Thomas,
>>
>> Thank you very much for your tip! It's great.
>> However, I have a question: How can I select the direction of the arrow? I
>> mean, between A and B I have a road segment:
>>
>> A----------------B
>>
>> Right now, it renders as A---->---->----->-----B, but I want it to render as
>> A----<------<-----<------B.
>>
>> My question is: how does mapserver select the order of A and B? If I
>> understand this, I can create another symbol and use it for the reverse
>> path.
>>
>> Thanks,
>> Adrian
>>
>> thomas bonfort wrote:
>>
>> Hi,
>>
>> for repeated arrow symbols, you can use a truetype (or image, or
>> vector) symbol, with a negative GAP:
>>
>> SYMBOL
>>  NAME oneway
>>  TYPE TRUETYPE
>>  CHARACTER '>'
>>  FONT arial
>>  GAP -20
>> END
>>
>> and then in your layer:
>>
>> STYLE
>>  SYMBOL oneway
>>  SIZE 8
>>  COLOR 0 0 0
>> END
>>
>> cheers,
>> thomas
>>
>> On Mon, Nov 10, 2008 at 10:51, Adrian Popa <adrian_gh.popa at romtelecom.ro>
>> wrote:
>>
>>
>> Hello everybody,
>>
>> I have a map that displays roads stored in a polyline format. I would like
>> to mark one-way streets with an arrow symbol drawn on top of the road
>> itself. The symbol can be as small as possible (for beginning I would like
>> to be able to superimpose it anywhere between the street ends, and later on
>> I will lock it to be next to one of the ends).
>>
>> I can already select the one way streets based on the following template:
>>
>>   CLASS
>>
>>      Name "OneWay"
>>
>>      EXPRESSION
>> /^FO040127$|^FO040132$|^FO040139$|^FO040120$|^FO040104$|^FO040131$|^FO040146$|^FO040129$/
>>      STYLE
>>
>>         COLOR 255 0 0
>>
>>         WIDTH 4
>>
>>      END
>>
>>      LABEL
>>
>>          COLOR 0 0 255
>>
>>          TYPE TRUETYPE
>>
>>          FONT arial
>>
>>          SIZE 8
>>
>>      ANTIALIAS TRUE
>>
>>
>>          POSITION AUTO
>>
>>
>>          ANGLE AUTO
>>          PARTIALS TRUE
>>
>>
>>          MINDISTANCE 0
>>
>>
>>          BUFFER 0       END
>>
>>
>>  END
>>
>> Can you show me an example of how to draw such a symbol on top of the layer?
>> Thank you
>>
>> Adrian
>>
>> _______________________________________________
>> mapserver-users mailing list
>> mapserver-users at lists.osgeo.org
>> http://lists.osgeo.org/mailman/listinfo/mapserver-users
>>
>>
>>
>>
>>
>> --
>> Adrian Popa
>>
>> Network Engineer
>> Romtelecom S.A.
>> Divizia Centrul National de Operare Retea
>> Departament Transport IP & Metro
>> Compartiment IP Core
>>
>>
>>     
>
>   


-- 
Adrian Popa

Network Engineer
Romtelecom S.A.
Divizia Centrul National de Operare Retea
Departament Transport IP & Metro
Compartiment IP Core


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/mapserver-users/attachments/20081110/69b5d980/attachment.htm>