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Vertical track geometry [message #1370] Tue, 21 June 2016 16:24 Go to next message
iruldacunha is currently offline  iruldacunha
Messages: 6
Registered: June 2016
Junior Member
Hello,

Does anyone have an idea on how to represent a vertical track geometry? For example, in LandXML, there is section of tracks represented as follow:

<Alignment name="POINT P" length="10729.999981" staStart="9635.000000" desc="">
      <CoordGeom>
        <Line dir="118.260597" length="0.000001">
          <Start>6688142.924053 524155.814846</Start>
          <End>6688142.924053 524155.814847</End>
        </Line>
        <Spiral length="183.094296" radiusEnd="5560.000000" radiusStart="17010.382141" rot="ccw" spiType="clothoid" theta="0.458086">
          <Start>6688142.924053 524155.814847</Start>
          <PI>6688048.650193 524105.137203</PI>
          <End>6687980.877100 524070.591900</End>
        </Spiral>
        <Curve rot="ccw" length="1222.615288" crvType="arc" radius="5560.000000">
          <Start>6687980.877100 524070.591900</Start>
          <Center>6685455.924700 529024.198200</Center>
          <End>6686839.561929 523639.112483</End>
        </Curve>
      </CoordGeom>
</Alignment>


--
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 20:53] by Moderator

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Re: Vertical track geometry [message #1372 is a reply to message #1370] Wed, 22 June 2016 14:12 Go to previous messageGo to next message
christian.rahmig is currently offline  christian.rahmig
Messages: 37
Registered: January 2016
Member
Dear Illan,

Am 21.06.2016 um 16:24 schrieb Illan RUL-DA CUNHA:
> [...]
> Does anyone have an idea on how to represent a vertical
> track geometry?
> [...]

The track geometry can be modelled at its main points using
<gradientChange> elements. Via its parameters "slope",
"transitionLenght" and "transitionRadius" the basic attributes of the
vertical track geometry can be defined in railML 2.x. For railML 3 we
intend to have a more enhanced model. However, railML will not be that
detailed like e.g. LandXML regarding the specific alignment. What do you
need for your use case?

Best regards

--
Christian Rahmig
railML.infrastructure coordinator
Re: Vertical track geometry [message #1384 is a reply to message #1372] Fri, 24 June 2016 14:57 Go to previous message
iruldacunha is currently offline  iruldacunha
Messages: 6
Registered: June 2016
Junior Member
Dear Christian,

Is it planned to include the LandXML schema in railML 3, in order to have a more complete model?

More concretly, is it possible to add, in the railML standard, the attributes necessary to have a complete definition of the vertical geometry of a track (and particularly the clothoids)?

Thank you. Smile

Best regards,
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