DEM Comparisons
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![Page 1: DEM Comparisons](https://reader035.fdocuments.net/reader035/viewer/2022062221/5681311e550346895d978b16/html5/thumbnails/1.jpg)
DEM Comparisons
GMTED2010 to Global 90m DEM:At 30 ArcSec Resolution
![Page 2: DEM Comparisons](https://reader035.fdocuments.net/reader035/viewer/2022062221/5681311e550346895d978b16/html5/thumbnails/2.jpg)
Oregon, USA
Global DEM GMTED2010
Below Fusion Zone
DEM elev. range: -4 m to 4325 m DEM elev. range: 0 m to 4227 m
![Page 3: DEM Comparisons](https://reader035.fdocuments.net/reader035/viewer/2022062221/5681311e550346895d978b16/html5/thumbnails/3.jpg)
DEM Differences: Oregon, USABelow Fusion Zone
Difference range: -275 m to 419 m
Global DEM – GMTED2010
![Page 4: DEM Comparisons](https://reader035.fdocuments.net/reader035/viewer/2022062221/5681311e550346895d978b16/html5/thumbnails/4.jpg)
Mean product
Scaling method: bilinear
Histograms: Elevations across grids
![Page 5: DEM Comparisons](https://reader035.fdocuments.net/reader035/viewer/2022062221/5681311e550346895d978b16/html5/thumbnails/5.jpg)
Histogram: Elevation differences
![Page 6: DEM Comparisons](https://reader035.fdocuments.net/reader035/viewer/2022062221/5681311e550346895d978b16/html5/thumbnails/6.jpg)
Correlation Coefficient: 0.99991963
Correlation
![Page 7: DEM Comparisons](https://reader035.fdocuments.net/reader035/viewer/2022062221/5681311e550346895d978b16/html5/thumbnails/7.jpg)
Boxplots
![Page 8: DEM Comparisons](https://reader035.fdocuments.net/reader035/viewer/2022062221/5681311e550346895d978b16/html5/thumbnails/8.jpg)
North-central Canada
Global DEM GMTED2010
In Fusion Zone: Relatively Flat Terrain
DEM elev. range: 88 m to 624 mDEM elev. range: 47 m to 877 m
![Page 9: DEM Comparisons](https://reader035.fdocuments.net/reader035/viewer/2022062221/5681311e550346895d978b16/html5/thumbnails/9.jpg)
DEM Differences: North Central Canada
Difference range: -275 m to 419 m
Global DEM – GMTED2010
In Fusion Zone: Relatively Flat Terrain
N60
Difference range: -148m to 494 m
![Page 10: DEM Comparisons](https://reader035.fdocuments.net/reader035/viewer/2022062221/5681311e550346895d978b16/html5/thumbnails/10.jpg)
Mean product
Scaling method: bilinear
Histograms: Elevations across grids
![Page 11: DEM Comparisons](https://reader035.fdocuments.net/reader035/viewer/2022062221/5681311e550346895d978b16/html5/thumbnails/11.jpg)
Histogram: Elevation differences
Almost 0.023
![Page 12: DEM Comparisons](https://reader035.fdocuments.net/reader035/viewer/2022062221/5681311e550346895d978b16/html5/thumbnails/12.jpg)
Correlation
Correlation Coefficient: 0.99611437
![Page 13: DEM Comparisons](https://reader035.fdocuments.net/reader035/viewer/2022062221/5681311e550346895d978b16/html5/thumbnails/13.jpg)
Boxplots
![Page 14: DEM Comparisons](https://reader035.fdocuments.net/reader035/viewer/2022062221/5681311e550346895d978b16/html5/thumbnails/14.jpg)
Northwest Canada
Eastern Russia
Global DEM GMTED2010
In Fusion Zone: Variable Terrain
DEM elev. range: 13 m to 2842 m DEM elev. range: 18 m to 2711 m
DEM elev. range: -218 m to 2267 m DEM elev. range: 15 m to 2233 m
![Page 15: DEM Comparisons](https://reader035.fdocuments.net/reader035/viewer/2022062221/5681311e550346895d978b16/html5/thumbnails/15.jpg)
Difference range: -275 m to 419 m
Global DEM – GMTED2010
In Fusion Zone: Variable Terrain
N60
NW Canada
E. Russia
Difference range: -335 m to 467 m
Difference range: -938 m to 474 m
DEM Differences
![Page 16: DEM Comparisons](https://reader035.fdocuments.net/reader035/viewer/2022062221/5681311e550346895d978b16/html5/thumbnails/16.jpg)
Mean productScaling method: bilinear
Histograms: Elevations across grids
![Page 17: DEM Comparisons](https://reader035.fdocuments.net/reader035/viewer/2022062221/5681311e550346895d978b16/html5/thumbnails/17.jpg)
Histogram: Elevation differences
![Page 18: DEM Comparisons](https://reader035.fdocuments.net/reader035/viewer/2022062221/5681311e550346895d978b16/html5/thumbnails/18.jpg)
Correlation
Correlation Coefficient: 0.9989906
Correlation Coefficient: 0.99898092
![Page 19: DEM Comparisons](https://reader035.fdocuments.net/reader035/viewer/2022062221/5681311e550346895d978b16/html5/thumbnails/19.jpg)
Boxplots
![Page 20: DEM Comparisons](https://reader035.fdocuments.net/reader035/viewer/2022062221/5681311e550346895d978b16/html5/thumbnails/20.jpg)
All Datasets Comparisons
![Page 21: DEM Comparisons](https://reader035.fdocuments.net/reader035/viewer/2022062221/5681311e550346895d978b16/html5/thumbnails/21.jpg)
Below fusion zone
In fusion zone:Relatively Flat Terrain
In fusion zone: Variable Terrain
Boxplots
![Page 22: DEM Comparisons](https://reader035.fdocuments.net/reader035/viewer/2022062221/5681311e550346895d978b16/html5/thumbnails/22.jpg)
Below fusion zone
In fusion zone:Relatively Flat Terrain
In fusion zone: Variable Terrain
Boxplots- Zoomed
![Page 23: DEM Comparisons](https://reader035.fdocuments.net/reader035/viewer/2022062221/5681311e550346895d978b16/html5/thumbnails/23.jpg)
Working on Now:
Compute TWI on regions of interest (both datasets)- compare
Compare TWI to additional datasets? Only if direct comparison possible (projection, pre-processing)
What’s next?
Filling null data in Russia Smoothing needed?