Volume measurements are here!

pierotofy · 30 March 2018 14:02

Volume measurements are now available in WebODM!

Make sure to ./webodm.sh update to enable them.

Thank you all for all the feedback and contributions that have been made to bring this to realization.

Peek%202018-03-29%2015-32

smathermather · 24 April 2018 02:08

smathermather · 12 May 2018 13:36

“Make sure to check the “dsm” option in the task preset when you create a task.”

Deepthi_J_Patric · 29 May 2018 12:44

Algorithm of Volume calculation
The volume feature is an amazing addition to ODM platform.
A little confusion in the calculation of volume. What is the algorithm used for volume calculation? Is there any GRASS GIS algorithms working in the back end?

pierotofy · 29 May 2018 13:17

Precisely

github.com

OpenDroneMap/WebODM/blob/master/plugins/measure/calc_volume.grass

# area_file: Geospatial file containing the area to measure
# points_file: Geospatial file containing the points defining the area
# dsm_file: GeoTIFF DEM containing the surface
# ------
# output: prints the volume to stdout

#Import raster ans vector
v.import input=${area_file} output=polygon_area --overwrite 
v.import input=${points_file} output=polygon_points --overwrite
v.buffer -s --overwrite input=polygon_area type=area output=region distance=3 minordistance=3
r.external input=${dsm_file} output=dsm --overwrite

# Set Grass region to DSM resolution
g.region rast=dsm
# Set Grass region to vector bbox
g.region vector=region

# Create a mask to speed up computation
r.mask vect=region

This file has been truncated. show original

Improvements / suggestions are welcome.

Deepthi_J_Patric · 31 May 2018 05:49

Thanks @pierotofy .
What does the points input do in the calculation? Anything relating to the convex hull method?

pierotofy · 31 May 2018 13:28

They are used to compute the bspline surface.

vascodx · 15 May 2019 16:44

Is there a way to measure lengths with more precision? Currently, it rounds to meters, but when you need to measure small distances or more accurate distances, the error measured is significative.
Thanks in advance.

smathermather · 17 May 2019 02:21

Sounds like a feature request. Can you log something here?: