[GRASS-user] How to plot arrows style of speed and direction of wind...

[SGW00412 at nifty.com]

Dear Moritz and all

Thank you for useful advices !

Method [2] succeeded. However, the resolution should be small, and it devise it 
a little more.

Method [3] failed in the installation.
I have improved two files --Module.make, Grass.make-- referring to a past log. 
However, the installation failed with the following message;

/usr/bin/install -c  /usr/lib/grass64  /bin/d.barb /usr/lib/grass64/bin/

Best

Yasuo shimada
----------
> Use icon= for defining a symbol (see [1] for examples).
> 
> But you might be better off using a raster approach and d.rast.arrow.
> See example at [2].
> 
> Or check out Hamish' d.barb AddOn module [3].
> 
> Moritz
> 
> [1] http://grass.osgeo.org/wiki/IconSymbols
> [2] http://grass.osgeo.org/wiki/Meteorology
> [3] http://grass.osgeo.org/wiki/GRASS_AddOns#d.barb


I tried [2] and [3].

[2] 


Moritz Lennert <mlennert at club.worldonline.be>さん：
> On 23/06/11 16:03, sgw00412 at nifty.com wrote:
> > 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 )....
> 
> You can use rot_column to define rotation and size_colum to define size
> depending on speed. But this is size, not length...
> 
> Use icon= for defining a symbol (see [1] for examples).
> 
> But you might be better off using a raster approach and d.rast.arrow.
> See example at [2].
> 
> Or check out Hamish' d.barb AddOn module [3].
> 
> Moritz
> 
> [1] http://grass.osgeo.org/wiki/IconSymbols
> [2] http://grass.osgeo.org/wiki/Meteorology
> [3] http://grass.osgeo.org/wiki/GRASS_AddOns#d.barb