DEM Comparisons
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DEM Comparisons GMTED2010 to Global 90m DEM: At 30 ArcSec Resolution
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DEM Comparisons. GMTED2010 to Global 90m DEM: At 30 ArcSec Resolution. Below Fusion Zone. Oregon, USA. DEM elev. range: -4 m to 4325 m. DEM elev. range: 0 m to 4227 m. Global DEM. GMTED2010. Below Fusion Zone. DEM Differences: Oregon , USA. Global DEM – GMTED2010. - PowerPoint PPT Presentation
Transcript of DEM Comparisons
DEM Comparisons
GMTED2010 to Global 90m DEM:At 30 ArcSec Resolution
Oregon, USA
Global DEM GMTED2010
Below Fusion Zone
DEM elev. range: -4 m to 4325 m DEM elev. range: 0 m to 4227 m
DEM Differences: Oregon, USABelow Fusion Zone
Difference range: -275 m to 419 m
Global DEM – GMTED2010
Mean product
Scaling method: bilinear
Histograms: Elevations across grids
Histogram: Elevation differences
Correlation Coefficient: 0.99991963
Correlation
Boxplots
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
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
Mean product
Scaling method: bilinear
Histograms: Elevations across grids
Histogram: Elevation differences
Almost 0.023
Correlation
Correlation Coefficient: 0.99611437
Boxplots
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
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
Mean productScaling method: bilinear
Histograms: Elevations across grids
Histogram: Elevation differences
Correlation
Correlation Coefficient: 0.9989906
Correlation Coefficient: 0.99898092
Boxplots
All Datasets Comparisons
Below fusion zone
In fusion zone:Relatively Flat Terrain
In fusion zone: Variable Terrain
Boxplots
Below fusion zone
In fusion zone:Relatively Flat Terrain
In fusion zone: Variable Terrain
Boxplots- Zoomed
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?
