[postgis-users] Fwd: line direction

[franco base]

I send again message because it was blocked for the attcahed file too big



I have a public transport network with an arc for 2 Point(the bus stop).
I'd know without using the points information arc direction like in qgis
(as you can see from the attached imagine with arc_id and direction)


2013/5/14 Nicolas Ribot <nicolas.ribot at gmail.com>

> Hi,
>
> If you want to materialize direction from start to end of line, you can
> use st_startPoint and st_endpoint to determines the right ends.
> What is your use case ?
>
> Nicolas
>
>
> On 14 May 2013 13:49, franco base <frenk.calza at gmail.com> wrote:
>
>> Hi.
>> I know tgis function but doesn't work.
>> Myabe my question isn't correct.
>> I'd have a binary value according to the arc direction.
>> For example, in qgis I can view this information:
>> I can see an arrow on my arc according to direction.
>> I'd have the same using postgis.
>>
>> Thanks
>>
>>
>>
>> 2013/5/14 Paolo Corti <pcorti at gmail.com>
>>
>>> On Tue, May 14, 2013 at 6:03 PM, franco base <frenk.calza at gmail.com>
>>> wrote:
>>> > Hi.
>>> > I have a question for the list.
>>> >
>>> > Is there a postgis function to have line direction?
>>> >
>>>
>>> http://postgis.refractions.net/docs/ST_Azimuth.html
>>>
>>> regards
>>> p
>>>
>>> --
>>> Paolo Corti
>>> Geospatial software developer
>>> web: http://www.paolocorti.net
>>> twitter: @capooti
>>> skype: capooti
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>>
>>
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