[Qgis-user] Volume calculation - Reg

[Kirk Schmidt]

Hi Mike:

I usually convert the contours or breaklines into a point layer and then 
generate a dem from that.  This is not a precise methodology but it 
would depend on what you are trying to do and the precision of the 
underlying data.

Kirk Schmidt

On 12/18/2020 5:28 AM, Michael Dufty wrote:
>
> The links for Nicolas are quite useful, but I think to create a raster 
> DEM from vector lines you probably need to use the interpolate 
> triangulation with breaklines or structure lines.
>
> The dialogue takes a bit of getting used to, you need to choose the 
> layer the data will come from, click + then in the box below choose 
> whether the layer is being used for points, breaklines or structure lines.
>
> I’ve had major issues with the interpolation crashing QGIS if I try to 
> used it with breaklines for complex imported data, but it seems to 
> work OK for simple test geometries, and may be good for a simple 
> excavation.
>
> I’d be interested to know if anyone has had success with interpolation 
> using breaklines for more complex data, I’ve had to resort to other 
> software trying to import DEM supplied as dxf 3d faces, but maybe I’m 
> missing a basic step like fixing geometry or removing duplicates.
>
> *From:*Qgis-user <qgis-user-bounces at lists.osgeo.org> *On Behalf Of 
> *Nicolas Cadieux
> *Sent:* Friday, 18 December 2020 12:04 AM
> *To:* Abhi Shek <psn.abhishek at gmail.com>
> *Cc:* qgis-user at lists.osgeo.org
> *Subject:* Re: [Qgis-user] Volume calculation - Reg
>
> This should help
>
> https://youtu.be/EerXfUf-aHo <https://youtu.be/EerXfUf-aHo>
>
> https://www.pointsnorthgis.ca/blog/how-to-calculate-surfacecut-volume-qgis-advanced/ 
> <https://www.pointsnorthgis.ca/blog/how-to-calculate-surfacecut-volume-qgis-advanced/>
>
> Nicolas Cadieux
>
> https://gitlab.com/njacadieux <https://gitlab.com/njacadieux>
>
>
>
>     Le 17 déc. 2020 à 04:57, Abhi Shek <psn.abhishek at gmail.com
>     <mailto:psn.abhishek at gmail.com>> a écrit :
>
>     
>
>     Sir,
>
>     I invite your kind attention to the above subject. I am a beginner
>     in qgis.
>
>     I want to create a raster DEM using Vector Lines.
>
>     In a nutshell, I want to calculate the planned excavated volume.
>
>     please guide 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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