Use ArcGIS or QGIS software for georeferenced images.

Hi Clément,

By maps, do you mean a georeferenced orthophoto map (like the end product of Photoscan)? In that case what you are looking for are photogrammetry/SfM softwares. QGIS and ArcGIS are GIS softwares and are not dedicated for processing images the way photogrammetry softwares do (although I heard Esri has started doing some developments into the photogrammetry area). The principal difference being that GIS softwares do not normally perform image orientation. Here are some open source alternatives to Photoscan:

- VisualSFM (http://ccwu.me/vsfm/), but I'm not sure if it has an orthophoto generation function.

- IGN's MicMac (http://logiciels.ign.fr/?Micmac), this one can do almost all that Photoscan can do up to the orthophoto generation, but it may be a bit tricky to get used to. Try the Graphical User Interface created by Cerema, which is already in the download package. I recommend this for a complete photogrammetric workflow if you have enough time to learn it.

- GRAPHOS (description: http://www.luislf.es/eng/GRAPHOS.html download: https://github.com/itos3d/GRAPHOS/releases), this one is actually created for educational purposes, but works quite well. 

That's all the open source programs that I know of, maybe others can add more. Otherwise, if you simply want to create a mosaic of your drone images, then what you are looking for are image stitching softwares (ex. PTGui). 

Best,

Arnadi

Hello peoples,

Thanks for your answer ! I will explore this possibilities Vincent. I found some good and easy things to do the job with Qgis

Clément and who is interested,

You can use micmac (from IGN) and QGIS, for example.

Or you can also generate a point cloud with Visual SFM and run an orthorectification in other free software (as soon as you have all orientation parameters - iop & eop), and then create a map (it will not be based on stereo plotting, but you for you application I think is is fine).

Cheers