Frequently Asked Questions and Additional Resources

Často kladené otázky

Zpracování dat

Can I process two or more orthophoto GeoTIFFs to stitch them together?

Ne. ODM je fotogrammetrický postup a ortofotomapy neobsahují potřebné informace o fotoaparátu, protože snímky již byly ortorektifikovány. K tomu můžete použít jiný program, například Hugin.

The software is not using all of my CPU cores / memory / GPU all of the times. Is it normal?

Yes. The software tries to use all available resources, when possible, but not always. It’s normal to see 10-15% CPU utilization at several moments during processing and 0% GPU utilization for lots of times.

If I use the native version of the software, how can I allocate more resources for processing?

No need; the native (non-docker) version of the software already uses all available resources.

Licencování

I want to build a commercial application that includes ODM. Do I need a commercial license?

ODM je svobodný software s otevřeným zdrojovým kódem vydaný pod licencí AGPLv3. Můžete s ním svobodně vytvářet a prodávat aplikace, jen se ujistěte, že splňujete požadavky licence, zejména požadavek na zveřejnění zdrojového kódu.

Are there other licensing options aside from the AGPLv3?

Ne, litujeme!

Memory issues

Your computer is running out of memory, what can you do?

1. First you can buy more RAM, this is the ultimate and final solution.

2. Alternatively you can resize the images when uploading and/or tweak your quality settings.

3. Configure a swapfile. In both Windows and Linux you will need preferably a fast SSD or an NVME drive, and the computing process will be still a LOT slower.

• If you are using Windows with Docker+WSL2 you can add two rows in your .wslconfig file so that Docker will use a swapfile. See also the full Microsoft documentation on Advanced settings configuration in WSL.

"swap=128GB" # you will need 128GB of disk space of course
"swapfile=C:\\temp\\wsl-swap.vhdx" # this is where the swap file will be stored

• In Linux you can add a swap file or a partition dedicated to swap. For more information, please consult your search engine of choice as there are a lot of different distributions and methods to add swap.

Additional References

For Users

The following resources are a good place to start:

• README page for ODM

• README page for WebODM

• README page for NodeODM

• Ground Control Points Format Specification

• OpenDroneMap: The Missing Guide

For Developers

In addition to user resources, we recommend to also read the following:

• WebODM documentation: https://docs.webodm.org

• NodeODM API specification: https://github.com/OpenDroneMap/NodeODM/blob/master/docs/index.adoc

• Overview of the ODM pipeline: http://community.opendronemap.org/t/where-can-i-find-background-information-on-the-concepts-of-odm/665/2

• We keep a section in our forum dedicated to research papers. This is a valuable place where to read more about state of the art research related to structure from motion, multi-view stereo, meshing, texturing, etc. which can be used to improve the software.

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