[GRASS-user] How to plot arrows style of speed and direction of
wind...
sgw00412 at nifty.com
sgw00412 at nifty.com
Thu Jun 23 10:03:53 EDT 2011
Dear grass user
Recently, I am feeling sorry for many questions....
I'm looking for how to plot arrows of speed and direction of wind.
for example, if station A has 4m/s and Eest (degree 90 )of annual average wind
situation,
the plot like arrow style;
<----xA
Other hand, if station B has 2m/s and West (degree 270 ) of annal average wind
situation,
the plot also like arrow style:
Bx-->
...and so on.
In this case, data set is as follows;
station | lat | lon | w.speed | w.direction |
tokyo | 35.2| 25.4| 4.0 | 90 |
osaka | 24.5| 33.9| 2.0 | 270 |
...
w.speed is single and w.direction is integer. Wind direciotn ranges between 1
(=north), 90 (=east), 180 (=south), 270 (=west) and 360 (=north).
I think that this data set can import to vector data by using v.in.ascii...
So, I'm looking for command -- d.vect --, but can not find to arrows style of
speed and direction of wind...I think that it is difficult to show an arrow st
yle by using two properties (=two columns, speed and direction )....
Please teach me if there is profitable information...
Yasuo shimada ( japan weather association )
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