@5b6411ac @f4f101c0 An ex colleague got reasonable survival results from aerial image analysis on a 2 year old planting a few years back. I think that was in R. 

I have successfully used LIDAR to delineate emergent podocarps in QGIS. Ā great tool for finding big trees in hard to access places.

I'm really keen to see what you both come up with.

I know lots of work happening by Regional Councils to quantify indigenous vegetation cover for the NPS-IB as well.

https://cdn.masto.host/ecoevosocial/media_attachments/files/111/022/760/006/014/045/original/678f6802a3303ef4.jpg

https://cdn.masto.host/ecoevosocial/media_attachments/files/111/022/760/212/899/574/original/b5bd8692f69211df.jpg