Messages

1

General / Re: Best Practice for DEM "Resampling"

« on: September 07, 2020, 10:35:54 AM »

Thanks for your input, but my question was rather aimed at the resampling method used to assign height values to the grid cells. I know how to specify the desired DEM resolution, what I am curious about is how the height value for a grid cell is computed when more than one point are within a grid cell and if this is different wether you do the downsampling during the Build DEM or the Export DEM step.

And since GSD is a measure for average point spacing there is also a possibility for empty grid cells at highest resolution, so there has to be an interpolation rule for empty cells as well!

2

General / Best Practice for DEM "Resampling"

« on: August 12, 2020, 12:12:45 PM »

Hey there,

I am using Agisoft Metashape to create Digital Elevation Models. My data usually has a GSD in the low centimeter range but I want to export DEMs with an "even" cellsize (3cm instead of 2,1642cm for example). What is the best practice for the DEM "Resampling"?

1) Specify an "even" cellsize when exporting the DEM? (What resampling method is used?)
2) Specify an "even" cellsize when building the DEM? (What method is used for assigning a height value from the dense point cloud?)

Thanks in advance
Sebastian