Welcome Post

Hello All.

This Blog will catalog my progress toward evaluating the high resolution stereo DEM generated by the PGC  team (Paul M.).  I will use this blog to share progress toward a full evaluation (horiz and vert; ASP and SETSM) against my North Slope LiDAR data.

The PGC data were recently made publicly available on the Univ Minn website (at: http://www.pgc.umn.edu/elevation/) so it would be best if I did this sooner than later.

Paul and Spencer were able to deliver to me three different datasets for evaluation:

In order to get my head wrapped around all the different files that were sent, I generated some Mosaic Datasets in ArcGIS to organize all the small tiles into groups.  In the end I created these divisions: 

Here are the footprints and densities of the different datasets compared to the LiDAR data (red):

 SETSM DATA: note that data are only available where the shaded relief images are

ASP BAYSIAN DATA: orange is WV2, green in WV1.  Note the underlying shaded relief is not the extent of these datasets, but is just used for reference.

ASP PARABOLIC DATA: Note the underlying shaded relief is not the extent of these datasets, but is just used for reference.

My plan is to select test areas that have different topographic characteristics and compare them against the different datasets.  I have considered testing the following environments/metrics:

• High relief, high roughness (mountainous with bedrock outcrops)
• Low relief, high roughness (lake zone at northern end of LiDAR)
• Watershed delineation, stream profile (middle moraine area)
• Are there areas of thermokarst change that are resolvable between 2009 and 2012? (NE-14?)