goesaodc_sampleScanRaster: Sample values from a scan raster

In MazamaScience/MazamaSatelliteUtils: Utilities for Working with Model and Satellite Data as Rasters

Description

Sample values from a scan raster

Usage

goesaodc_sampleScanRaster(
  raster = NULL,
  lon = NULL,
  lat = NULL,
  radius = 1,
  method = "simple",
  fun = mean,
  na.rm = FALSE
)

Arguments

raster	RasterLayer with a variable.
lon	Longitude position.
lat	Latitude position.
radius	Radius of a buffer around each point (in meters) from which to extract cell values. If the distance between the sampling point and the center of a cell is less than or equal to the buffer, the cell is included.
method	Method of extracting cell values. If 'simple' values for the cell a point falls in are returned. If 'bilinear' the returned values are interpolated from the values of the four nearest raster cells. Defaults to 'simple'.
fun	Function used to summarize cell values if multiple cells fall within the given radius. Defaults to 'mean'.
na.rm	Logical flag determining whether to remove NA values before summarizing them with 'fun'. Defaults to FALSE.

Value

Numeric value extracted from the raster.

Examples

library(MazamaSatelliteUtils)
setSatelliteDataDir("~/Data/Satellite")

bboxOregon <- c(-125, -116, 42, 46.5)

scanFile <- goesaodc_listScanFiles(
  satID = "G17",
  datetime = "2020-09-08 12:00",
  timezone = "America/Los_Angeles"
)

# Create a raster for a scan file
scanRaster <- goesaodc_createScanRaster(
  filename = scanFile,
  bbox = bboxOregon,
  cellSize = 0.05
)

goesaodc_plotScanRaster(
  scanRaster,
  bbox = bboxOregon
)

goesaodc_sampleScanRaster(
  raster = scanRaster,
  lon = -123,
  lat = 46,
  radius = 10000
)

MazamaScience/MazamaSatelliteUtils documentation built on Dec. 17, 2021, 3:20 a.m.