1i.in.spotvgt(1)               Grass User's Manual              i.in.spotvgt(1)
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NAME

6       i.in.spotvgt  - Import of SPOT VGT NDVI file into a raster map
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KEYWORDS

9       raster, imagery, import
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SYNOPSIS

12       i.in.spotvgt
13       i.in.spotvgt help
14       i.in.spotvgt [-a] file=string  [rast=string]   [--overwrite]
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16   Flags:
17       -a  also import quality map (SM status map layer) and filter NDVI map
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19       --overwrite
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21   Parameters:
22       file=string
23           existing SPOT VGT NDVI HDF file (0001_NDV.HDF)
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25       rast=string
26           name for new raster map
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DESCRIPTION

29       i.in.spotvgt  imports  SPOT  Vegetation  (1km,  global) NDVI data sets.
30       After import the digital numbers (DN) are remapped to  VEGETATION  NDVI
31       values  and  the  NDVI  color  table is applied. The imported DN map is
32       removed after remapping.
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34       Apparently missing raster cells due to bad  pixel  quality  are  recon‐
35       structed  by  the SPOT operating team in the NDVI file. The differences
36       between the filtered (-a flag) and raw NDVI map should be compared.
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NOTES

39   Export of entire world SPOT VGT maps
40       When working with SPOT VGT with entire world extent, it is  recommended
41       to  zoom  to  w=180W and e=180E instead of using the map extent for map
42       export. These entire world SPOT VGT data are  exceeding  -180.0  degree
43       which can lead to unhelpful large East-West coordinates in the exported
44       file. It is also recommended  to  then  use  an  export  command  which
45       respects the user settings. Example:
46       # import:
47       i.in.spotvgt 0001_NDV.HDF
48       # export:
49       g.region    w=180W    e=180E    n=75:00:16.071429N   s=56:00:16.069919S
50       res=0:00:32.142857 -p
51       r.out.tiff -t 0001_NDV out=spotndvi
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SEE ALSO

55        r.in.gdal
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REFERENCES

58       SPOT Vegetation (1km, global) NDVI data set server
59       SPOT Vegetation FAQ
60       SPOT Vegetation Status Map (SM) - Quality map
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AUTHOR

63       Markus Neteler
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65       Last changed: $Date: 2006/01/31 16:23:49 $
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67       Full index
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71GRASS 6.2.2                                                    i.in.spotvgt(1)
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