dot-extract_var: extract_var

In IMOS-AnimalTracking/remora: Rapid Extraction of Marine Observations for Roving Animals

extract_var

Description

Extract variables from pulled variables

Usage

.extract_var(
  unique_positions,
  env_stack,
  env_var,
  .fill_gaps,
  .buffer = NULL,
  verbose = TRUE
)

Arguments

unique_positions	dataframe with unique coordinates and dates from where to extract daily environmental data
env_stack	a raster stack object with daily spatial environmental layers associated with detection dates (output from .pull_var function)
env_var	name of extracted variable (brought in from extractEnv function)
.fill_gaps	Fill spatial gaps within each layer using a distance buffer
.buffer	radius of buffer (in m) around each detection from which environmental variables should be extracted from. A median value of pixels that fall within the buffer will be used if .fill_gaps = TRUE
verbose	should function provide details of what operation is being conducted. Uses parameter from parent function extractEnv

Details

Internal function to conduct raster extraction of environmental variables from downloaded raster stack (env_stack) and detection positions (unique_positions)

Value

a dataframe with unique position, unique dates and extracted environmental variables

IMOS-AnimalTracking/remora documentation built on Jan. 29, 2025, 4:38 p.m.