Align option - photos without coordinates / without GCP

gm2gabriel

Hello, I have a task done with a dataset of photos with geotag (EXIF data) and without GCP. Good results.

I have another dataset of the same area, different time, of photos without geotag (no EXIF coordinates) and without GCP. This dataset was processed, visually fine, however, of course, there is no way to WebODM use world coordinates, task is completed on local coordinates, without proper scale.

Is it possible to process the second dataset using the first task to align?

Basically, I would like to use a task to align processing of a new dataset without images coordinates or GCP.
If this is possible, I guess it is a workaround to "fix" a dataset that doesn´t have georeferencing.

WebODM v3.2.8
I do have the two tasks in the same project, however the "align field" is not visible after I load the images of the second dataset without EXIF coordinates or GCP.
However, if I add another task, and add the same images with EXIF coordinates of the first dataset, the "align field" indeed is available.

6 Replies

pierotofy

Create a GCP file for the second dataset using 3 coordinates from the first

Miner_Jeff

@pierotofy is there not an option to align based on DEMs? Or am I mixing memories with another software tool? ( I am thinking the latter since you didn't mention it here.)

pierotofy

You can certainly align via DEM also (upload a align.tif file along with the images), but both datasets need to be georeferenced for that to work

gm2gabriel OP

In the new taks with photos without coodinate + gcp list, the align option is not available

gm2gabriel OP

By georeferenced dataset do you mean, direct georeferenced images (with coordinates).
Just to be sure, because I consider WebODM does indirect georeferencing by triangulation of gcp

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