Description Usage Arguments Details Value Examples
Each image .tar.gz file will be extracted into a subfolder within
output_folder
. The subfolders will be named according to the year and
Julian date of capture, and the sensor type (LT4, LT5 or LE7 for Landsat 4
TM, Landsat 5 TM, and Landsat 7 ETM+ respectively). For example,
"LT50150531986037-SC20130816144215.tar.gz" would be extracted into a
subfolder named "1986_037_LT5', for 1986, Julian day 37, and Landsat 5 TM.
1 2 | espa_extract(in_folder, out_folder, pathrows = NULL, start_date = NULL,
end_date = NULL, sensors = NULL)
|
in_folder |
Path to a folder of .tar.gz Landsat surface reflectance images |
out_folder |
output folder |
pathrows |
a list of paths/rows to include. Each path/row should be specified as a six digit string. For example, path 231, row 62 would be specified as "231062". |
start_date |
start date of period from which images will be extracted
to (as |
end_date |
end date of period from which images will be extracted
to (as |
sensors |
a list of the sensors to include (can be any of "LT4", "LT5", "LE7", or "LC8") |
Zip files for images from sensors not included in sensors
, from
path/rows not included in pathrows
or with acquisition dates
outside of the period defined by start_date
and end_date
will
be ignored.
nothing (used for side effect of unzipping Landsat CDR tarballs)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | ## Not run:
# Don't filter:
espa_extract('D:/Landsat_Originals', 'D:/Landsat_Out')
# Filter by start and end date:
start_date <- as.Date('2010/1/1')
end_date <- as.Date('2010/12/31')
espa_extract('D:/Landsat_Originals', 'D:/Landsat_Out',
start_date=start_date, end_date=end_date)
# Filter by start and end date, sensor, and pathrow:
espa_extract('D:/Landsat_Originals', 'D:/Landsat_Out',
start_date=start_date, end_date=end_date, sensors='LE7',
pathrows='231062')
## End(Not run)
|
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