| Re: Modelling transition bends [message #1236 is a reply to message #1235] |
Mon, 08 December 2014 11:00  |
Christian Rahmig
Messages: 151
Registered: January 2011
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Senior Member |
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Dear railML IS users,
Am 03.12.2014 08:59, schrieb Christian Rahmig:
> [...]
>>
>> (1) add further description of the radiusChange using the description
>> attribute. Thus, the type of the curve can be described. If not empty,
>> possible values can be:
>>
>> * UA_cubicParabola
>> * UA_parabola4
>> * UA_clothoide
>> * UA_WienerBogen
>> * UA_BlossBogen
>> * UA_Sinusoide
>> * UA_Cosinusoide
>> * UA_other
>> * UE, which marks the end of the transition curve.
>>
>> [...]
>
> Instead of the abbreviations 'UA' and 'UE' that are derived from the
> German terms "Übergangsbogenanfang" and "Übergangasbogenende", it is
> suggested to use the English driven abbreviations 'TS' (Tangent -
> Spiral) and 'SC' (Spiral - Curve).
>
> [...]
here comes the proposed solution for the transition curve problem:
A new attribute named "geometryElementDescription" has been added to the
element <radiusChange>. It is an enumeration parameter, which provides
the following entries that enable a more detailed description of
transition curves:
* TS_cubicParabola
* TS_parabola4
* TS_clothoide
* TS_WienerBogen
* TS_BlossBogen
* TS_Sinusoide
* TS_Cosinusoide
* SC
* (any other)
As already mentioned, the abbreviations TS (Tangent - Spiral) and SC
(Spiral - Curve) describe the points at the beginning and at the end of
the transition curve.
The modifications have been implemented for railML 2.3 with SVN revision
616. For more details, see the Trac ticket [1].
[1] http://trac.railml.org/ticket/251
Best regards
--
Christian Rahmig
railML.infrastructure coordinator
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