[GRASS-user] displaying lines between given points

[Patton, Eric]

This sounds like the method I would have used. Have you had any luck so far?

~ Eric. 

-----Original Message-----
From: grassuser-bounces at grass.itc.it
To: GRASS users list
Sent: 8/1/2006 5:56 AM
Subject: [GRASS-user] displaying lines between given points

Hi,

A colleague of mine has a data set with airports (and their coordinates)

and flights between these airports, i.e. something like this:

x1 y1 x2 y2 flights

He wants to display these connections as lines between the airports, 
whose line width is proportional to the number of flights.

Anyone have a great idea of how to do this in GRASS ? I currently see 
the following possibility:

1) use awk to transform the file into an ascii vector line file, i.e.:

L 2 1
x1 y1
x2 y2
1 flights

2) import with v.in.ascii

3) select distinct values from the cats column

4) loop through those distinct values and d.vect with line width set to 
cats value * scale


Anyone have a better idea ?

Moritz

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