calculate_snowextent: calculate_snowextent

In SebEagle/snowcoveR: Calculates the snow extent of a Sentinel 2 & Landsat 8 time series and plots the results as 3D-gif animations

Description

This function named 'calculate_snowextent' loads testsite SWIR & green tif files and calculates NDSI values. Additionally a simple snow/no-snow classification and a snow/cloud/snowfree-surface classification is produced.

Therefore thresholds are used:
Snow: minimum NDSI, minimum reflectance in green band
Cloud: minimum reflectance in green band and SWIR band + existence of snow

Usage

calculate_snowextent(store_directory, s02, ls8, thresholds_snow_cloud)

Arguments

store_directory	Directory where all satellite scenes are stored in subfolders
s02, ls8	defines, whether data from Sentinel or Landsat subfolder is used
thresholds_snow_cloud	set thresholds for snow extent & cloud cover for the resulting classification. The parameter contains a list of 4 thresholds first: NDSI minimum value for snowcover second: minimum green reflectance for snowcover third: minimum green reflectance for cloudcover fourth: minimum SWIR reflectance for cloudcover

Author(s)

Sebastian Buchelt (M.Sc. EAGLE - University of Wuerzburg)

SebEagle/snowcoveR documentation built on May 31, 2019, 12:07 p.m.