Making Sense Of My Curvature Diagram

Question

Hello all 
 It has been a while since I made a post, so here goes. 
 I have collected some survey data of a rail alignment and imported this into BRT. 
 I have created a curvature diagram so that i can see roughly where the constant radii, transitions etc fall. 
 Below is the curvature diagram, as you can see the radii is all over the place. 
 The Yellow line on the bottom is where I think the transition starts and ends and the red lines are where I think the constant curve starts and ends. But I cannot make sense of the rest as the radii is scattered 
 I was wondering if someone could give me their opinion on this curvature diagram.

Any help will be greatly appreciated. 
 
 Thank You.

LiPeng · Accepted Answer

Hi Stewart, 
 It looks like the accuracy of the imported points are poor (either rather poor track-geometry or something wrong in your workflow). 
 Check if the x- and y-coordinates of your imported points have the proper format/result and they have the decimals imported as well (i.e. not like *******.000) . If nothing wrong there, you may want to try to import every second or third point instead (change the "Minimum Distance Toleraance" in "Advanced" tab of "Add Horizontal Regression Points"). 
 Hope this gives you some ideas for a solution. 
 LiPeng (Denmark)

neville · Answer

Stewart 
 In my humble opinion this is what you have (I'm not sure about the start - too little data). Two compound curves (large and smaller radius with intermediate transition) then reverse curve with two transitions to large radius. I agree with LiPeng data is rather poor. Are there any sets/turnouts in this section?

Making Sense Of My Curvature Diagram

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