Home » railML newsgroups » railml.infrastructure » Clothoid (How to represent the geometry of a clothoid?)
Clothoid [message #1367] Tue, 21 June 2016 13:13 Go to next message
iruldacunha is currently offline  iruldacunha
Messages: 6
Registered: June 2016
Junior Member
Hello,

I'm an intern at Systra in railway engineering. I'm working on BIM technologies, such as railML, and we are making a study to use this format in the future, that's why I have so many questions to ask you.

Does someone have an example of a clothoid represented with its geometry? For example:
<radiusChange radius="2000" pos="175,18"
superelevation="15" geometryElementDescription="TS_clothoide">

Indeed, I tried to write this example with the documentation, but I think its not sufficient to represent the infrastructure geometry of the clothoid.

Don't hesitate to share an example which works. Smile Thank you very much.

Best regards,

--
Illan RUL-DA CUNHA
Stagiaire étude et développement
DTE DOP, pôle BIM

72-74 rue Henry Farman • 75015 Paris • France
www.systra.com

[Updated on: Sat, 11 February 2017 20:54] by Moderator

Report message to a moderator

Re: Clothoid [message #1371 is a reply to message #1367] Wed, 22 June 2016 13:32 Go to previous messageGo to next message
christian.rahmig is currently offline  christian.rahmig
Messages: 45
Registered: January 2016
Member
Dear Illan,

welcome to the railML infrastructure community!

Am 21.06.2016 um 13:35 schrieb Illan RUL-DA CUNHA:
> [...]
>
> Does someone have an example of a clothoid represented with
> its geometry? For example: <radiusChange radius="2000"
> pos="175,18"
> superelevation="15"
> geometryElementDescription="TS_clothoide">
> Indeed, I tried to write this example with the
> documentation, but I think its not sufficient to represent
> the infrastructure geometry of the clothoide.
>
> [...]

Indeed, the example you provided only states that you have a clothoid,
but not which specific type. Please use one of the other available
enumeration values:
* TS_cubicParabola
* TS_parabola4
* TS_WienerBogen
* TS_BlossBogen
* TS_Sinusoide
* TS_Cosinusoide
You can also define your own value (if correct one is missing) making
use of the any enumeration value.

To be clear: railML does not model the transition curve parameters.
Please look them up in a corresponding reference or try to include the
LandXML schema.

Best regards
Christian

--
Christian Rahmig
railML.infrastructure coordinator
Re: Clothoid [message #1385 is a reply to message #1371] Mon, 27 June 2016 09:54 Go to previous message
iruldacunha is currently offline  iruldacunha
Messages: 6
Registered: June 2016
Junior Member
Hello, Christian,

I think, but maybe I'm wrong, that a clothoid is already a specific type of curvature, like a sinusoide or a Wiener Bogen.

Where can I include the LandXML? In railML?

[Updated on: Mon, 27 June 2016 09:54]

Report message to a moderator

Previous Topic: Vertical track geometry
Next Topic: [railML3|alpha] Remarks on example_tiny_v02.xml of v0.is3
Goto Forum:
  


Current Time: Thu Jun 29 17:57:56 CEST 2017