Mosaicing of many aerial photographs

[sidtupper]

I have about 50 photos of ground imagery acquired with a drone on a regular pattern of waypoints. Would GRASS be a good tool to mosaic the images?

[ninsbl]

Depends on your data acquisition and aim. You could patch (mosaic) images using GRASS GIS with r.patch or r.buildvrt after importing with r.in.gdal or r.external. If you have sufficient overlap between images, I would rather use OpenDroneMap as that is specific for the purpose and also open source...

[sidtupper]

Thanks, I will look into OpenDroneMap.

[BadAssassin]

GRASS is capable of mosiaicing images into an orthophoto, but I would suggest looking into WebODM[1]. It uses newer structure-from-motion algorithms and I have personally had very good success using it. You will need to do a little tweaking to get straight edges on buildings, but the forums are very helpful. They have a docker image that takes most of the installation headaches away and is designed with drones in mind. I often do my initial processing in WebODM, then move the products to GRASS for further development. Point clouds and orthos generated prove particularly useful and can seamlessly tie into DroneDB. [1] https://www.opendronemap.org/webodm/

On 10/23/2022 11:46 AM, sidtupper wrote: I have about 50 photos of ground imagery acquired with a drone on a regular pattern of waypoints. Would GRASS be a good tool to mosaic the images? — Reply to this email directly, view it on GitHub <#2608>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AQZTHVNZ64SBXFPZYT365GLWEWBZJANCNFSM6AAAAAARMMZI5E>. You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

-- Best Regards, -Brad

[sidtupper]

Thanks!