i.landsat.download - GRASS GIS manual

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NAME

i.landsat.download - Downloads Landsat TM, ETM and OLI data from EarthExplorer using landsatxplore library

KEYWORDS

imagery, satellite, Landsat, download

SYNOPSIS

i.landsat.download

i.landsat.download --help

i.landsat.download [-l] settings=name [output=name] [map=name] [clouds=integer] [dataset=string] [start=string] [end=string] [id=string[,string,...]] [tier=string[,string,...]] [sort=string[,string,...]] [order=string] [timeout=integer] [limit=integer] [--help] [--verbose] [--quiet] [--ui]

Flags:

-l: List filtered products and exit
--help: Print usage summary
--verbose: Verbose module output
--quiet: Quiet module output
--ui: Force launching GUI dialog

Parameters:

settings=name [required]: Full path to settings file (user, password); '-' for standard input
output=name: Name for output directory where to store downloaded Landsat data
map=name: Name of input vector map to define Area of Interest (AOI); If not given then current computational extent is used
clouds=integer: Maximum cloud cover percentage for Landsat scene
dataset=string: Landsat dataset to search for; Options: landsat_tm_c1, landsat_etm_c1, landsat_8_c1, landsat_tm_c2_l1, landsat_tm_c2_l2, landsat_etm_c2_l1, landsat_etm_c2_l2, landsat_ot_c2_l1, landsat_ot_c2_l2; Default: landsat_8_c1
start=string: Start date ('YYYY-MM-DD')
end=string: End date ('YYYY-MM-DD')
id=string[,string,...]: List of scenes IDs to download
tier=string[,string,...]: Tiers; Options: RT, T1, T2
sort=string[,string,...]: Sort by values in given order; Options: acquisition_date, cloud_cover; Default: cloud_cover,acquisition_date
order=string: Sort order (see sort parameter); Options: asc, desc; Default: asc
timeout=integer: Download timeout in seconds; Default: 300
limit=integer: maximum number of Landsat scenes; Default: 50

DESCRIPTION
EXAMPLES
REQUIREMENTS
SEE ALSO
AUTHOR

DESCRIPTION

i.landsat.download allows to search and download Landsat TM, ETM and OLI data from USGS EarthExplorer through the landsatxplore Python library. Datasets currently supported include Collection 1 and Collection 2.

Landsat data are organized in tiers: Newly-acquired Landsat scenes are placed in the Real-Time (RT) tier. After reprocessing they are transitioned to either Tier 1 (T1; scenes with the highest available data quality, considered suitable for time-series analysis) or Tier 2 (T2; less accurate geometry). The Tier designation (T1, T2, RT) is indicated at the end of the Landsat Product Identifier.

The supported Landsat satellites include (see also Landsat satellite chronology):

Landsat 5 (TM): 1984 to 2013
Landsat 7 (ETM+): 1999 to present (note: Landsat 7 ETM+ SLC-off error after May 31, 2003)
Landsat 8 (OLI): 2013 to present

The dataset names and IDs are:

Dataset Name	Dataset ID
Landsat 5 TM Collection 1 Level 1	`landsat_tm_c1`
Landsat 5 TM Collection 2 Level 1	`landsat_tm_c2_l1`
Landsat 5 TM Collection 2 Level 2	`landsat_tm_c2_l2`
Landsat 7 ETM+ Collection 1 Level 1	`landsat_etm_c1`
Landsat 7 ETM+ Collection 2 Level 1	`landsat_etm_c2_l1`
Landsat 7 ETM+ Collection 2 Level 2	`landsat_etm_c2_l2`
Landsat 8 Collection 1 Level 1	`landsat_8_c1`
Landsat 8 Collection 2 Level 1	`landsat_ot_c2_l1`
Landsat 8 Collection 2 Level 2	`landsat_ot_c2_l2`

To connect to EarthExplorer both a user name and a password are required. See the register page for signing up.

i.landsat.download reads the user credentials either from the terminal or from the settings file. This file must contain two lines:

myusername
mypassword

User credentials can be also defined interactively when settings=- is given. Note that interactive prompt does not work in the graphical user interface.

Insert username: myusername
Insert password:

By default, only products which footprint intersects current computation region extent (area of interest, AOI) are filtered. The AOI can be optionally defined by a vector map. In this case, the vector extent will be used as AOI.

To only list available scenes, l flag must be set. If no start or end dates are provided, the module will search scenes from the past 60 days.

To download all scenes found within the time frame provided, the user must remove the l flag and provide an output directory. Otherwise, files will be downloaded into /tmp directory. To download only selected scenes, one or more IDs must be provided through the id option, along with the settings file and an output directory. In addition, a timeout (in seconds) can be set to define how long a request should wait for a response before aborting (default is 300 seconds).

EXAMPLES

Search available scenes:

i.landsat.download -l settings=credentials.txt \
    dataset=landsat_8_c1 clouds=15 \
    start='2018-08-24' end='2018-12-21'

Download all available scenes:

i.landsat.download settings=credentials.txt \
    dataset=landsat_8_c1 clouds=15 \
    start='2018-08-24' end='2018-12-21' \
    timeout=600

Download selected scenes by ID:

i.landsat.download settings=credentials.txt \
    id=LC81391162018338LGN00,LC81301172018339LGN00 \
    output=/tmp

REQUIREMENTS

landsatxplore library (install with pip install landsatxplore)

AUTHOR

Veronica Andreo, CONICET, Argentina.

SOURCE CODE

Available at: i.landsat.download source code (history)

Latest change: Wednesday Sep 01 13:38:21 2021 in commit: 78e390f693ad3a6ec9a0004b5e2e1f62b70024d8