process_modis_merge: Process MODIS .hdf files

In amadeus: Accessing and Analyzing Large-Scale Environmental Data

Process MODIS .hdf files

Description

Get mosaicked or merged raster from multiple MODIS hdf files.

Usage

process_modis_merge(
  path = NULL,
  date = NULL,
  subdataset = NULL,
  fun_agg = "mean",
  ...
)

Arguments

path	character. Full list of hdf file paths. preferably a recursive search result from base::list.files.
date	character(1). date to query. Should be in "YYYY-MM-DD" format.
subdataset	character(1). subdataset names to extract. Should conform to regular expression. See base::regex for details. Default is NULL, which will result in errors. Users should specify which subdatasets will be imported.
fun_agg	Function name or custom function to aggregate overlapping cell values. See fun description in terra::tapp for details.
...	For internal use.

Value

a SpatRaster object

Note

Curvilinear products (i.e., swaths) will not be accepted. MODIS products downloaded by functions in amadeus, MODISTools, and luna are accepted.

Author(s)

Insang Song

See Also

download_data

Examples

## NOTE: Example is wrapped in `\dontrun{}` as function requires a large
##       amount of data which is not included in the package.
## Not run: 
mod09ga_merge <- process_modis_merge(
  path =
    list.files("./data", pattern = "MOD09GA.", full.names = TRUE),
  date = "2024-01-01",
  subdataset = "sur_refl_b01_1",
  fun_agg = "mean"
)

## End(Not run)

amadeus documentation built on April 4, 2025, 12:21 a.m.