v.lidar.growing(1)

1v.lidar.growing(1)            Grass User's Manual           v.lidar.growing(1)
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NAME

6       v.lidar.growing   -  Building  contour determination and Region Growing
7       algorithm for determining the building inside
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KEYWORDS

10       vector, LIDAR
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SYNOPSIS

13       v.lidar.growing
14       v.lidar.growing help
15       v.lidar.growing input=name  output=name  first=name   [database=string]
16       [driver=string]   [tj=float]   [td=float]   [--overwrite]
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18   Flags:
19       --overwrite
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21   Parameters:
22       input=name
23           Name of input vector map
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25       output=name
26           Name for output vector map
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28       first=name
29           Name of the first pulse vector map
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31       database=string
32           Database name - THIS OPTION WILL BE REMOVED SOON
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34       driver=string
35           Driver   name   -   THIS  OPTION  WILL  BE  REMOVED  SOON  Options:
36           dbf,mysql,ogr,pg,sqlite,mesql,odbc
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38       tj=float
39           Threshold for cell object frequency in region growing Default: 0.2
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41       td=float
42           Threshold for double pulse in region growing Default: 0.6
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DESCRIPTION

45       v.lidar.growing is the second of three step to filter  LIDAR  data.  It
46       identifies  which is the internal area of every object on a LIDAR point
47       surface. The input data is the output result of the  v.lidar.correction
48       module.  It  is  based  on  the  hypothesis  that inside the object the
49       heights are, in general, higher than on the contour. The output will be
50       a  vector  map which points are pre-classified as TERRAIN SINGLE PULSE,
51       TERRAIN DOUBLE PULSE, OBJECT SINGLE PULSE or OBJECT DOUBLE  PULSE.  The
52       input of this module should be the output of v.lidar.edgedetection mod‐
53       ule, and the output of this module will be the input of v.lidar.correc‐
54       tion module.
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NOTES

57       The   final  result  of  the  whole  procedure  (v.lidar.edgedetection,
58       v.lidar.growing, v.lidar.correction) will be a point classification  in
59       four categories:
60       TERRAIN SINGLE PULSE
61       TERRAIN DOUBLE PULSE
62       OBJECT SINGLE PULSE
63       OBJECT DOUBLE PULSE
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EXAMPLES

66   Basic region growing procedure
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68       v.lidar.growing input=edge output=growing
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AUTHOR

75       Original version of program in GRASS 5.4:
76       Maria  Antonia Brovelli, Massimiliano Cannata, Ulisse Longoni and Mirko
77       Reguzzoni
78       Update for GRASS 6.X:
79       Roberto Antolin and Gonzalo Moreno
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REFERENCES

82       Brovelli M. A., Cannata M., and Longoni U.M., 2004, LIDAR Data  Filter‐
83       ing  and  DTM  Interpolation  Within  GRASS, Transactions in GIS, April
84       2004, vol. 8, iss. 2, pp. 155-174(20), Blackwell Publishing Ltd
85       Brovelli M. A. and Cannata M., 2004, Digital Terrain model  reconstruc‐
86       tion   in urban areas from airborne laser scanning data: the method and
87       an  example for Pavia (Northern Italy). Computers and  Geosciences  30,
88       pp.325-331
89       Brovelli  M. A e Longoni U.M., 2003, Software per il filtraggio di dati
90       LIDAR, Rivista dell'Agenzia del Territorio, n. 3-2003, pp. 11-22  (ISSN
91       1593-2192)
92       Brovelli  M.  A., Cannata M. and Longoni U.M., 2002, DTM LIDAR in  area
93       urbana, Bollettino SIFET N.2, 2002, pp. 7-26
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95       Last changed: $Date: 2007/04/16 21:36:04 $
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97       Full index
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101GRASS 6.2.2                                                 v.lidar.growing(1)