Hi,

This new line is a 3D Line.  This means that every vertex has x,y,z 
coordinates.  If you want to put that in a field, this is a bit complicated as 
every vertex has a z dimension. 

You could easily use the field calculator to extract the first node or last 
node z value or could get an average of every z value for the line.  You could 
also “explode” the line. This would split the line in multiple parts having a 
maximum of 2 nodes (vertices). Then you could extract the first or last node z 
value.

Hope this helps.

Nicolas Cadieux
https://gitlab.com/njacadieux

> Le 6 mars 2022 à 01:07, krishna Ayyala <[email protected]> a écri
> 
> 
> Nicolas, I ran the Drape tool as shown below. It resulted in a new  line 
> feature called "Draped" and added to my map. But this new feature has exactly 
> same attributes as that of "Lines" feature. i.e. it does not have any new 
> field such as Z added to the attribute table. 
> Regards.
> 
> <image.png>
> 
> 
>> On Sat, Mar 5, 2022 at 7:07 PM Nicolas Cadieux <[email protected]> 
>> wrote:
>> Hi,
>> 
>> Go in processing and search for “drape”.
>> 
>> Nicolas Cadieux
>> https://gitlab.com/njacadieux
>> 
>>>> Le 5 mars 2022 à 14:48, krishna Ayyala via Qgis-user 
>>>> <[email protected]> a écrit :
>>>> 
>>> 
>>> Hello,
>>> I have a DEM. I have a vector layer on top of the DEM. This vector layer 
>>> has 100 lines numbered from 1 to 100. Is there a tool that can generate 
>>> Elevation and grade profiles along each of these lines? Is there a way to 
>>> automate this instead of generating each profile individually?
>>> 
>>> Regards.
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