First Results: D1 (high relief area)

Now that the automated data processing workflow is very close to complete, I thought I would share some preliminary results from this afternoon's analysis.  These images represent the types of outputs I will generate for the different data sets in the different domains.

Slope-Shaded LiDAR DEM(clipped, projected, ft->m, resampled to 4m)

-----------------------------------------ASP_Bay Data-------------------------------------------

Slope-Shaded ASP_Bay_4m_WV01_DEM 

Vertical difference map (Lidar-ASP_Bay), liner scale between -2m (red) and -6m (blue)

It looks like a northward horizontal shift in the ASP image would improve things.

Histogram of above difference map.  Range from -2 to -6., 

Std. Deviation = +/-1.5 with mean of -4.3m

As Paul says, "Wow."

-----------------------------------------ASP_Par Data-------------------------------------------

Slope-Shaded ASP_Par_4m_WV01_DEM 

(edge due to limited DEM extent)

Vertical difference map (Lidar-ASP_Par), liner scale between -4m (red) and -10m (blue)

Note that there is an East-West horizontal shift issue with this image.  

If the ASP-Par image was shifted west, you would get much better results

Histogram of above difference map.  Range from -4 to -10., 

Std. Deviation = +/-9.1 with mean of -7.8m

These statistics would be better if the image was shifted west.

-----------------------------------------SETSM Data-------------------------------------------

PLEASE NOTE: SETSM DEMs are beta versions not final. 

Upcoming SETSM DEMs will reduce artifacts like the abrupt height change at mosaic boundaries.

Slope-Shaded LiDAR DEM(clipped, projected, ft->m, resampled to 2m)

Slope-Shaded SETSM_2m_DEM 

(note abrupt change in surface roughness at east-west running seam)

Vertical difference map (Lidar-SETSM), liner scale between -0m (red) and -4m (blue)

Note the East-West seam between input images.

South of the seam, there is a clear need for a southward shift in SETSM relative to the LiDAR.  

Hard to say what kind of shift is needed in the upper image.  Same?

Histogram of above difference map.  Range from 0 to -4.

Std. Deviation = +/-1.0 with mean of -1.9m

These statistics would be better if the image was shifted south.

Again,

As Paul says, "Wow."