[GRASS-user] how to draw line with arrow mark to line top (tip)

[Vincent Bain]

Hello Yasuo,

If you just need to display line directions with an arrow head on
end-node, you can use the "display=dir" option available for d.vect.

If you need to display a custom symbol, you cannot use "icon=" option,
which is dedicated to point and centroid features (not lines).

Envethough the following case describes a method to compose a hardcopy
map, this wiki entry can help you :
http://grasswiki.osgeo.org/wiki/Tips_and_Tricks#Compensate_the_lack_of_line_ends_symbology_in_ps.map

The idea is to create a point vector where points are assigned a
rotation angle value corresponding to the line last (or first) segment
orientation. Then you just have to call d.vect whith "icon=" and
"rot_column=" options.

Good luck!

Vincent


Le vendredi 24 janvier 2014 à 14:12 +0900, sgw00412 at nifty.com a écrit :
> Hollow grass users
> 
> I'm from Japan, and biggner.
> 
> I do not find how to draw line with arrow mark to line top (tip).
> 
> for exsample...
> 
> normally line;
> --------
> 
> line with arrow mark to line top (tip);
> -------->
> or
> <--------
> 
> I read online manual and tried to command 'd.vect layer_name icon=basic/arrow1
> ', however nothing happend....
> 
> Does anyone to know it?
> 
> Best
> Yasuo SHIMADA (japan weather associaton)
> 
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