i.in.spotvgt(1grass)

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

6       i.in.spotvgt  - Imports SPOT VGT NDVI data into a raster map.
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KEYWORDS

9       imagery, import, NDVI, SPOT
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SYNOPSIS

12       i.in.spotvgt
13       i.in.spotvgt --help
14       i.in.spotvgt  [-a]  input=name  [output=name]   [--overwrite]  [--help]
15       [--verbose]  [--quiet]  [--ui]
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17   Flags:
18       -a
19           Also import quality map (SM status map layer) and filter NDVI map
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21       --overwrite
22           Allow output files to overwrite existing files
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24       --help
25           Print usage summary
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27       --verbose
28           Verbose module output
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30       --quiet
31           Quiet module output
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33       --ui
34           Force launching GUI dialog
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36   Parameters:
37       input=name [required]
38           Name of input SPOT VGT NDVI HDF file
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40       output=name
41           Name for output raster map
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DESCRIPTION

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

54       The  SPOT  VGT  files  are  delivered in HDF4 (Hierarchical Data Format
55       Release 4) format. It is required to have the GDAL libraries  installed
56       with HDF4 support.
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58   Export of entire world SPOT VGT maps
59       When  working with SPOT VGT with entire world extent, it is recommended
60       to zoom to w=180W and e=180E instead of using the map  extent  for  map
61       export.  These  entire  world SPOT VGT data are exceeding -180.0 degree
62       which can lead to unhelpful large East-West coordinates in the exported
63       file.  It  is  also  recommended  to  then  use an export command which
64       respects the user settings. Example:
65       # import:
66       i.in.spotvgt 0001_NDV.HDF
67       # export:
68       g.region w=180W e=180E n=75:00:16.071429N s=56:00:16.069919S res=0:00:32.142857 -p
69       r.out.gdal 0001_NDV format=GTiff out=spotndvi.tif
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REFERENCES

75       SPOT Vegetation (1km, global) NDVI data set server
76       SPOT Vegetation FAQ
77       1.13 How must I read the 8 bits of the status map? - Quality map
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AUTHOR

80       Markus Neteler
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82       Last changed: $Date: 2013-05-11 15:23:40 +0200 (Sat, 11 May 2013) $
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SOURCE CODE

85       Available at: i.in.spotvgt source code (history)
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87       Main index | Imagery index | Topics index | Keywords index |  Graphical
88       index | Full index
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90       © 2003-2019 GRASS Development Team, GRASS GIS 7.6.0 Reference Manual
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94GRASS 7.6.0                                                    i.in.spotvgt(1)