Radar Vegetation Index (rvidp)#

polsartools.rvidp(infolder, window_size=1, outType='tif', cog_flag=False, cog_overviews=[2, 4, 8, 16], write_flag=True, max_workers=None, block_size=(512, 512), progress_callback=None)[source]

Computes Radar vegetation index from the input dual-polarization (dual-pol) C2 matrix data, and writes the output in various formats (GeoTIFF or binary). The computation is performed in parallel for efficiency.

Example:#

>>> rvidp("path_to_C2_folder", window_size=5, outType="tif", cog_flag=True)
This will compute Radar vegetation index from the C2 matrix in the specified folder,
generating output in Geotiff format with Cloud Optimized GeoTIFF settings enabled.

Parameters:#

infolderstr

Path to the input folder containing C2 matrix data.

window_sizeint, optional

Size of the processing window (default is 1).

outTypestr, optional

Output format of the files; can be “tif” (GeoTIFF) or “bin” (binary) (default is “tif”).

cog_flagbool, optional

If True, outputs Cloud Optimized GeoTIFF (COG) (default is False).

cog_overviewslist of int, optional

List of overview levels to be used for COGs (default is [2, 4, 8, 16]).

write_flagbool, optional

Whether to write the computed output files (default is True).

max_workersint, optional

Number of parallel workers for processing (default is None, which uses one less than the number of available CPU cores).

block_sizetuple of int, optional

Size of each processing block (default is (512, 512)), defining the spatial chunk dimensions used in parallel computation.

Returns:#

None

The function writes the computed Radar vegetation index to the specified output format.

Output Files:#

  • “rvidp.tif” or “rvidp.bin”

The formulation of RVI is as follows:

\[\text{RVI}_{dp} = \frac{4 \times \sigma^\circ_{\text{XY}}}{\sigma^\circ_{\text{XX}}+\sigma^\circ_{\text{XY}}}\]

where, \(\sigma^\circ_{\text{XX}}\) is co-pol backscatter intensity and \(\sigma^\circ_{\text{XY}}\) is corss-pol backscatter intensity

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