The IMERG dataset provides near-real time global observations of rainfall at 10km resolution, which can be used to estimate total rainfall accumulation from storm systems and quantify the intensity of rainfall and flood impacts from tropical cyclones and other storm systems. IMERG is a daily precipitation dataset available from 2015 to present within the latitudes 70 and -70 degrees.
Usage
get_imerg(object, dates, operation = 5, ...)
# Default S3 method
get_imerg(object, dates, operation = 5, ...)
# S3 method for class 'sf'
get_imerg(object, dates, operation = 5, as.sf = FALSE, ...)
# S3 method for class 'geojson'
get_imerg(object, dates, operation = 5, as.geojson = FALSE, ...)Arguments
- object
input, an object of class
data.frame(or any other object that can be coerced todata.frame),SpatVector,SpatRaster,sforgeojson- dates
a character of start and end dates in that order in the format "YYYY-MM-DD"
- operation
optional, an integer that represents which type of statistical operation to perform on the dataset
- ...
additional arguments passed to
terraorsfmethods See details- as.sf
logical, returns an object of class
sf- as.geojson
logical, returns an object of class
geojson
Value
A data frame of imerg data:
- id
the index for the rows in
object- dates
the dates from which imerg was requested
- lon
the longitude as provided in
object- lat
the latitude as provided in
object- imerg
the IMERG value
Details
operation: supported operations are:
| operation | value | |
| max | = | 0 |
| min | = | 1 |
| median | = | 2 |
| sum | = | 4 |
| average | = | 5 (default value) |
dist: numeric, buffer distance for each object coordinate
nQuadSegs: integer, number of segments per buffer quadrant
Examples
if (FALSE) { # interactive()
lonlat <- data.frame(lon = c(-55.0281,-54.9857),
lat = c(-2.8094, -2.8756))
dates <- c("2017-12-15", "2017-12-31")
dt <- get_imerg(lonlat, dates)
dt
}