Open fmaussion opened 2 years ago
@fmaussion Have you decided that glaciers on the peninsula proper be left out of RGI7, or were these glaciers not included for technical or time reasons?
The outlines in Huber et al. 2017 used a rock outcrop dataset originally produced automatically from imagery, hence the pixelated appearance. But with some filtering, these polygons should be ready to go.
Antarctic Mainland is not part of RGI - we only do Islands periphery.
The Huber 2017 dataset was considered as replacement for the Peninsula's islands, but it is just too messy:
Antarctic Mainland is not part of RGI - we only do Islands periphery.
In that case I'll drop off this conversation, but my thoughts before I leave. Huber et al. 2017 used the glacier basin outlines from Cook et al. 2014 as a base:
Then cut out an earlier version of these automatic rock outcrops extracted from Landsat 8. These are, as you point out, very messy compared to the smoother but less accurate/complete traced rock outcrops. You can compare both at https://add.scar.org/ (see Rock outcrop
and Rock outcrop (from Landsat 8)
).
So I think the path forward is to improve the map of rock outcrops. Perhaps by dilating, smoothing the more complete but very "holey" automatic rock outcrops.
traced outcrops in orange, automatic outcrops in pink
Thank you! Yes I think that UZH is thinking about it, and that it would be a good addition to RGI7.1!
RGI19 currently has no changes to RGI6, except for Kerguelen where we will use an improved inventory.
Here is what we have done:
Here is what needs to be done:
Hubert et al dataset image examples
Screenshots from @burnout-stephl .