DEM Comparisons

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    01-Jan-2016
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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 ComparisonsGMTED2010 to Global 90m DEM:At 30 ArcSec Resolution

  • Oregon, USA

    Below Fusion Zone

    DEM elev. range: -4 m to 4325 mDEM elev. range: 0 m to 4227 m

  • DEM Differences: Oregon, USA

    Below Fusion Zone

    Difference range: -275 m to 419 mGlobal DEM GMTED2010

  • Mean productScaling method: bilinearHistograms: Elevations across grids

  • Histogram: Elevation differences

  • Correlation Coefficient: 0.99991963Correlation

  • Boxplots

  • North-central Canada

    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 mGlobal DEM GMTED2010

    In Fusion Zone: Relatively Flat Terrain

    N60

    Difference range: -148m to 494 m

  • Mean productScaling method: bilinearHistograms: Elevations across grids

  • Histogram: Elevation differences

    Almost 0.023

  • Correlation

    Correlation Coefficient: 0.99611437

  • Boxplots

  • In Fusion Zone: Variable Terrain

    DEM elev. range: 13 m to 2842 mDEM elev. range: 18 m to 2711 mDEM elev. range: -218 m to 2267 mDEM elev. range: 15 m to 2233 m

  • Difference range: -275 m to 419 mGlobal DEM GMTED2010

    In Fusion Zone: Variable Terrain

    N60

    NW Canada

    E. Russia

    Difference range: -335 m to 467 mDifference range: -938 m to 474 mDEM Differences

  • Mean productScaling method: bilinearHistograms: 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 TerrainBoxplots

  • Below fusion zone In fusion zone:Relatively Flat Terrain In fusion zone: Variable TerrainBoxplots- 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) Whats next? Filling null data in Russia Smoothing needed?