1v.what.vect(1) Grass User's Manual v.what.vect(1)
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6 v.what.vect - Uploads vector values at positions of vector points to
7 the table.
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10 vector, database, attribute table
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13 v.what.vect
14 v.what.vect help
15 v.what.vect vector=name [layer=integer] column=string qvector=name
16 [qlayer=integer] qcolumn=string [--verbose] [--quiet]
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18 Parameters:
19 vector=name
20 Points vector map to modify
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22 layer=integer
23 Layer in the vector to be modified
24 Default: 1
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26 column=string
27 Column to be updated with the query result
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29 qvector=name
30 Vector map to be queried
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32 qlayer=integer
33 Layer of the query vector containg data
34 Default: 1
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36 qcolumn=string
37 Column to be queried
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40 v.what.vect transfers attributes from the qvector's map attribute table
41 into the attribute table of points present in the vector map. The
42 script is based on v.distance.
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45 The upload column, into which the query results are stored, must be
46 present in the vector map. Use v.db.addcol to add one if needed.
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48 This module only uploads attributes which exist at the exact positions
49 of the input's vector points. For a "nearest feature" fit, use v.dis‐
50 tance instead.
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52 In case of a multipoint input vector map, with several points having
53 the same category number, it can happen, that the query result is NULL,
54 if the same category number falls into different qvector polygons.
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57 In this example, the 'archsites' point map in the Spearfish location is
58 copied to the current mapset, a new attribute column is added and the
59 owner names from the 'fields' polygon map are transferred to the
60 'myarchsites' map at points' locations:
61 g.copy vect=archsites,myarchsites
62 v.db.addcol myarchsites col="owner varchar(25)"
63 v.what.vect myarchsites qvect=fields column=owner qcolumn=label
64 # verification:
65 v.db.select myarchsites
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69 v.db.addcol, v.db.select, v.distance, v.rast.stats, v.what.rast
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72 Markus Neteler
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74 Last changed: $Date: 2007-06-10 13:23:21 +0200 (Sun, 10 Jun 2007) $
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76 Full index
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78 © 2003-2008 GRASS Development Team
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82GRASS 6.3.0 v.what.vect(1)