I have a shapefile with a MultiLinestringZ
geometry type that I created using the grass v.drape function to attach z-values from a DEM. In order to calculate the 3d length of a line segment, can I use the $length
function in the QGIS field calculator, or will this function only report the 2d length?
$length
value. Maybe submit a documentation issue to make this explicit in the help if it is the case? Also, I can't find a function or plugin that says it can measure 3d line lengths for things with Z geometry.