GIS Tutorial - Tree Volume Calculation: Part 1 – Canopy 3D models – geomatic surveying approaches - MediaSpace

GIS Tutorial - Tree Volume Calculation: Part 1 – Canopy 3D models – geomatic surveying approaches

From Francesco Pirotti

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00:30 - dataset availability at course moodle page or at https://doi.org/10.5281/zenodo.7348378

01:20 - lidar = before harvest activity - drone = after harvest activity

02:10 - what lidar capabilities are with respect to vegetation

03:30 - 3d model from lidar vs from photogrammetry - what is the difference in forest environment?

04:00 - what is the difference between a digital surface model (DSM) vs a digital terrain model (DTM)

05:22 - query a cell value from all three digital models using the mouse pointer

06:20 - NB query results refer to "band 1" for each raster layer... that is because some raster types can have multiple bands. In our case we only have one.

08:40 - using the raster calculator to create the canopy height model (CHM) -

10:43 - why can we use the lidar DTM to create the CHM from the drone DSM?

12:08 - color scales to CHM

14:00 - semi-3d raster styling of the DTM to simulate terrain morphology with color scales from the CHM

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GIS Tutorial - Tree Volume Calculation: Part 1 – Canopy 3D models – geomatic surveying approaches

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