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NAME - Imports SPOT VGT NDVI data into a raster map.


imagery, import, NDVI, SPOT

SYNOPSIS --help [-a] input=name [output=name] [--overwrite] [--help] [--verbose] [--quiet] [--ui]


Also import quality map (SM status map layer) and filter NDVI map
Allow output files to overwrite existing files
Print usage summary
Verbose module output
Quiet module output
Force launching GUI dialog


input=name [required]
Name of input SPOT VGT NDVI HDF file
Name for output raster map

Table of contents

DESCRIPTION imports SPOT Vegetation (1km, global) NDVI data sets. After 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.

Apparently missing raster cells due to bad pixel quality are reconstructed by the SPOT operating team in the NDVI file. The differences between the filtered (-a flag) and raw NDVI map should be compared.


The SPOT VGT files are delivered in HDF4 (Hierarchical Data Format Release 4) format. It is required to have the GDAL libraries installed with HDF4 support.

Export of entire world SPOT VGT maps

When working with SPOT VGT with entire world extent, it is recommended to zoom to w=180W and e=180E instead of using the map extent for map export. These entire world SPOT VGT data are exceeding -180.0 degree which can lead to unhelpful large East-West coordinates in the exported file. It is also recommended to then use an export command which respects the user settings. Example:
# import: 0001_NDV.HDF

# export:
g.region w=180W e=180E n=75:00:16.071429N s=56:00:16.069919S res=0:00:32.142857 -p
r.out.gdal 0001_NDV format=GTiff out=spotndvi.tif

SEE ALSO, r.out.gdal


SPOT Vegetation (1km, global) NDVI data set server
SPOT Vegetation FAQ
1.13 How must I read the 8 bits of the status map? - Quality map


Markus Neteler


Available at: source code (history)

Latest change: Friday Mar 17 18:47:22 2023 in commit: 5ccff03ffb84bb18b869f6a87ba00ae0ad56d16e

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