index_summary: Summary Statistics for Spectral Indices

In GeoIndexR: Computation of Spectral and Geospatial Indices from Multispectral Raster Data

Summary Statistics for Spectral Indices

Description

Computes descriptive statistics for one or multiple spectral index layers in a terra::SpatRaster object, including min, max, mean, median, standard deviation, percentiles (5th, 25th, 75th, 95th), and NA percentage.

Usage

index_summary(x, digits = 4)

Arguments

x	A terra::SpatRaster object containing one or more index layers.
digits	Integer indicating the number of decimal places to round results. Defaults to 4.

Value

A data.frame of class "geo_index_summary" with one row per layer:

index	Layer/index name.
min	Minimum index value.
max	Maximum index value.
mean	Mean index value.
median	Median index value.
sd	Standard deviation.
q05	5th percentile.
q25	25th percentile (1st quartile).
q75	75th percentile (3rd quartile).
q95	95th percentile.
na_pct	Percentage of NA values (0 to 100).
total_cells	Total number of raster cells.

Examples

img <- get_example_data()
ndvi <- geo_index(img, "NDVI")
index_summary(ndvi)

# Multi-layer summary
stack <- geo_indices(img, c("NDVI", "NDWI", "NDBI"))
index_summary(stack)

GeoIndexR documentation built on Oct. 10, 2026, 5:08 p.m.