Enabling split-merge on WebODM

Hi, I’ve read quite a bit but don’t see anything specific about using split-merge in WebODM. From this webpage (https://www.opendronemap.org/2019/05/split-merge-nearing-completion/) it appears that it “Coming soon to a WebODM near you… .”. This was a year ago, is this available in WebODM?

I’ve found a sentence that indicates that is should be, but it is slightly difficult to parse. From here (https://docs.opendronemap.org/large.html) it says:

“Split-merge works in WebODM out of the box as long as the processing nodes support split-merge, by enabling the --split option when creating a new task.”

How can I enable the ‘–split’ option in WebODM? I’ve read through all the text boxes on the options and don’t see anyway to enable the split-merge method.

How do I make sure the processing nodes support split-merge? It seems I need to enable “the --split option when creating a new task.” But where do I type that in? Does that apply when I am only using the one node on my local machine? How do I enable “the --split option” on that one node?

Sorry for asking the same question multiple times, I’m just trying to illustrate what the difficulty is with understanding that part of the documentation for a novice user of ODM.


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Are you on the most recent version? I’ve attached a screenshot of what you’re looking for. You need split-overlap (the size in meters between overlapping image clusters) and split (the number of images you want to split each cluster into).

Screen Shot 2020-05-16 at 10.53.16

Screen Shot 2020-05-16 at 10.50.18!


Thanks for your reply. I’m again having some trouble parsing a sentence. When you say I “need split-overlap (the size in meters between overlapping image clusters)” I’m a bit confused. If the clusters were overlapping there would not be a distance “between”. Do you mean that “split-overlap” is the amount of overlap between overlapping image clusters?

Currently I’m having to re-download the docker image as I had to increase the size of the docker container, but I’ll look for those settings.

I ended up running

docker-machine rm default
docker-machine create --driver virtualbox --virtualbox-disk-size "40000" default

And then when I ran

git clone https://github.com/OpenDroneMap/WebODM --config core.autocrlf=input --depth 1
cd WebODM
./webodm.sh start

It downloaded a new container. Is that “using the latest version” or do I need to do a

./webodm.sh update

Or do I need to do a

git pull origin master

as well?