Calculate spatial correlation between raster layers

Calculate spatial correlation between two raster layers using various methods. Supports pixel-wise correlation and local correlation analysis.

Usage

calculate_spatial_correlation(
  raster1,
  raster2,
  method = "pearson",
  local_correlation = FALSE,
  window_size = 3
)

Arguments

raster1

First raster layer

raster2

Second raster layer

method

Correlation method: "pearson", "spearman", "kendall"

local_correlation

Calculate local correlation using moving window

window_size

Window size for local correlation (in pixels)

Value

Correlation coefficient or SpatRaster of local correlations

Examples

if (FALSE) { # \dontrun{
# These examples require external data files not included with the package
# Global correlation between NDVI and soil nitrogen
correlation <- calculate_spatial_correlation(ndvi_raster, nitrogen_raster)

# Local correlation with moving window
local_corr <- calculate_spatial_correlation(
  ndvi_raster, nitrogen_raster,
  local_correlation = TRUE,
  window_size = 5
)
} # }