NAME
i.in.probav - Imports PROBA-V NDVI data in netCDF format into a raster map with real NDVI data range.
KEYWORDS
imagery,
import,
NDVI,
PROBA-V
SYNOPSIS
i.in.probav
i.in.probav --help
i.in.probav input=name output=name [scale=float] [shift=float] [memory=integer] [--overwrite] [--help] [--verbose] [--quiet] [--ui]
Flags:
- --overwrite
- Allow output files to overwrite existing files
- --help
- Print usage summary
- --verbose
- Verbose module output
- --quiet
- Quiet module output
- --ui
- Force launching GUI dialog
Parameters:
- input=name [required]
- Name of input PROBA-V NDVI .nc file
- output=name [required]
- Name for output raster map
- scale=float
- Scale factor for input
- Default: 0.004
- shift=float
- Shift factor for input
- Offset factor for input
- Default: -0.08
- memory=integer
- Maximum memory to be used in MB
- Options: 0-2047
- Default: 300
i.in.probav imports Proba-V NDVI data sets.
After the import the digital numbers (DN) are remapped to VEGETATION NDVI
values and the NDVI color table is applied. The imported DN map is
removed after remapping. It is also possible to change the scale and offset
factor (default is scale: 0.004, offset: -0.08 for Proba-V)
and to improve the memory usage (default is 300 MB).
Important for the Proba-V Data sets, is a user registration at
the VITO portal
necessary (Register Button in the Upper Right Corner).
The Proba-V files are delivered in NetCDF (Network Common Data Form)
format. It is required to have the GDAL libraries installed with NetCDF support.
Also to check the necessary scale and offset factor with
gdalinfo.
When working with Proba-V NDVI, it it necessary to fix the range of the map because
it exceeds the -180°..+180° range with entire world extent.
You can shift the map slightly into the right position using
gdal_translate.
This example in
Global datasets may help you.
# import of 300m NDVI
i.in.probav input=c_gls_NDVI300_201611010000_GLOBE_PROBAV_V1.0.1.nc \
output=c_gls_NDVI300_201611010000_GLOBE_PROBAV_V1.0.1 memory=500
i.in.spotvgt,
r.in.gdal
Jonas Strobel
SOURCE CODE
Available at:
i.in.probav source code
(history)
Latest change: Monday Jan 30 19:52:26 2023 in commit: cac8d9d848299297977d1315b7e90cc3f7698730
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GRASS Development Team,
GRASS GIS 8.4.1dev Reference Manual