[Qgis-user] Qgis - create attribute at regular interval along Z axis based on above attribute elevation

[Nicolas Cadieux]

Hi,

I am not quite sure I understand what you are asking but in Excel you could use a “round up” function.  Then perhaps use this rounded up number to do a vlookup on a table having the next higher up value? Not sure how to do that in Access.

Not sure how or if you can do that in QGIS... I would need to see actual problem i think to be able to fully understand it.

Nicolas


> Le 2 nov. 2018 à 21:28, Francois Chartier <fra.chartier at gmail.com> a écrit :
> 
> Hi, 
> 
> I am using Microsoft Access to populate a data set at regular intervals along the vertical axis between two elevation ranges (50 to 350 masl) and have the attribute (which does not exist) of that elevation to become the attribute of the above data point.  example at 124.4, attribute at location 1 is A,  therefore at 124 attribute becomes A, and this down to the next data point at example 121.6 masl where it is B (you will at location 1: at 124=A, 123=A, 122=A). 
> The goal being to interpolate different elevation slices at regular intervals as data points are not all at the same elevations depending on location.  
> I am able to do this with a Cross Join query in access and then removing any intervals above top and bottom.  this is quite fastiduous, and i am wondering if i can do this straight in qgis, or
> if i can run an interpolation with a condition that the value at location x,y equals the next above attribute value.  this would keep the attribute table much smaller.
> 
> thanks
> F
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