Evaluation of the GMTED2010 (250m) to derive topographic variables - PowerPoint PPT Presentation

Jan 02, 2023 •155 likes •231 views

Evaluation of the GMTED2010 (250m) to derive topographic variables at 1km resolution (first results) Giuseppe Amatulli GMTED2010 7.5 arc-seconds (250m) Median Statistic Minimum Statistic Mean Statistic Maximum Statistic

Evaluation of the GMTED2010 (250m) to derive topographic variables at 1km resolution (first results) Giuseppe Amatulli
GMTED2010 7.5 arc-seconds (250m) ● Median Statistic ● Minimum Statistic ● Mean Statistic ● Maximum Statistic ● Standard Dev. Statistic ● Breakline Emphasis ● Systematic Subsample
GMTED2010 7.5 arc-seconds (250m) ● Derived variables – Percent area in 1km pixels of values over a specific threshold (from -500 to 8700m) Using – Minimum Statistic – Maximum Statistic Useful for altitudinal ranges
GMTED2010 Roughness vs EARTHENV-DEM90 Roughness GMTED2010 - 250 EARTHENV-DEM90 – 90m Pearson Coeff. 1km-median (Roughness of Systematic Subsample ) 1km-median (Roughness of -DEM90) 0.989316 1km-median (Roughness of Median Statistic) 1km-median (Roughness of -DEM90) 0.988585 1km-median (Roughness of Mean Statistic) 1km-median (Roughness of -DEM90) 0.987848 1km-median (Roughness of Breakline Emphasis ) 1km-median (Roughness of -DEM90) 0.982874 I will compute the same analysis for: Terrain Ruggedness Index (TRI) Topographic Position Index (TPI)
GMTED2010 1km-median (Roughness of Systematic Subsample )
1km-median (Roughness of EARTHENV- DEM90)

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