[Qgis-user] Ramp formation volume calculate

[Kirk Schmidt]

Abhi:

Basically, you will have to create a surface of the object you are 
trying to model and an exit DEM of the study site.  The challenge is how 
to create the ramp, semicircle model you described.

If you want to create the ramp object in QGIS, I would suggest 
digitizing the footprint of the ramp structure using many vertices.  I 
would then extract the vertices from the footprint polygon and add z 
values for each vertex in the point layer. You can visualize these using 
the 3D Map view and adjust the z value as required.  Once you are happy 
with the results, you can generate a tin from the point layer.

Someone on the list may have a bteer approach, but this is all I can 
come up with using version 3.10.

The following link describes the general process and will get you started:

https://www.pointsnorthgis.ca/blog/how-to-calculate-surfacecut-volume-qgis-advanced/

Kirk Schmidt

On 12/22/2020 7:19 AM, Abhi Shek wrote:
> Sir,
>
> Please refer to the subject above, I want to calculate the volume of 
> earth excavation to form a ramp profile with an end semi-circle. The 
> details are as follows:
> Ramp length 50m (from 150 RL to 50 RL) after turned to curve of radius 
> 3m end 25RL
>
> Please help me in this matter.
>
>
> -- 
> with warm regards,
> P S N Abhishek,
>
>
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-- 
Kirk Schmidt, MScF, BScF, RPF
General Manager
Nortek Resource Solutions Inc.
RR # 1
Thorburn, NS
B0K 1W0
Tel (902) 922.3607
Email: kirk at nortekresources.com
Web: www.nortekresources.com

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