[Qgis-user] volume calculation workflow.

[Byron Veilleux]

i have a shapefile with elevation values as digitized contours, for the
same surface, i have well data elevation points for this same surface.
is it possible in QGIS to use the contours and well points to create a grid?
once i have created grids (actually two surfaces), is there a way to
subtract these grids and calculate the volume between these surfaces?
is there a tutorial for grid operations such as subtracting one grid from
another to calculate volumes and multiply grids together or using constant
values
thank you

-- 
Byron Veilleux, MSc. P.Geo
Conjugate Geologic Services Limited
Calgary, Alberta Canada
byron at conjugategeo.com
Cell:4037108414
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