View source: R/Lib_FilterData.R
create_mask_from_threshold | R Documentation |
create a mask based on NDVI, Green reflectance and NIR reflectance NDVI (min) threshold eliminates non vegetated pixels Blue (max) threshold eliminates Clouds NIR (min) threshold eliminates shadows ! only valid if Optical data!!
create_mask_from_threshold(
ImPath,
MaskPath,
MaskPath_Update,
NDVI_Thresh,
Blue_Thresh,
NIR_Thresh,
Blue = 480,
Red = 690,
NIR = 835
)
ImPath |
character. Full path of a raster file |
MaskPath |
character. Full path of the mask to be used with the raster file |
MaskPath_Update |
character. Full path of the updated mask to be used with the raster file |
NDVI_Thresh |
numeric. NDVI threshold applied to produce a mask (select pixels with NDVI>NDVI_Thresh) |
Blue_Thresh |
numeric. Blue threshold applied to produce a mask (select pixels with Blue refl < Blue_Thresh –> filter clouds) refl expected between 0 and 10000 |
NIR_Thresh |
numeric. NIR threshold applied to produce a mask (select pixels with NIR refl < NIR_Thresh) refl expected between 0 and 10000 |
Blue |
numeric. spectral band corresponding to the blue channel (in nanometers) |
Red |
numeric. spectral band corresponding to the red channel (in nanometers) |
NIR |
numeric. spectral band corresponding to the NIR channel (in nanometers) |
MaskPath path for the updated shademask produced
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