[GRASSLIST:10756] Re: draw gps co-ordinates with a varying circle around them

[Michael Barton]

You can also use the thematic mapper (d.vect.thematic)

Michael
__________________________________________
Michael Barton, Professor of Anthropology
School of Human Evolution and Social Change
Arizona State University
Tempe, AZ 85287-2402

phone: 480-965-6213
fax: 480-965-7671
www: http://www.public.asu.edu/~cmbarton



> From: Hamish <hamish_nospam at yahoo.com>
> Date: Mon, 6 Mar 2006 15:05:58 +1300
> To: <dylan.beaudette at gmail.com>
> Cc: <phm4 at kent.ac.uk>, <GRASSLIST at baylor.edu>
> Subject: [GRASSLIST:10746] Re: draw gps co-ordinates with a varying circle
> around them
> 
>>> I hope I explain my problem properly. I have managed, with your
>>> help, to visualise my gps data with v.neigbors, where v.neigbors
>>> lets me specify the size of the neigborhood diameter and then counts
>>> how many gps points fall within each neigborhood.
>>> What I like to do now is to visualise gps data which has long and
>>> lat, plus a value for the size of the neigborhood around each long -
>>> lat co-ordinate, e.g.:
>>> 
>>> 51.298895 | 1.071705 | 0.1
>>> 
>>> I don't want grass to count the frequency of gps co-ordinates which
>>> fall into the neigborhood, as all of them have already been
>>> eliminated from the data. So all I want grass to do essentially is
>>> to visualise gps co-ordinates with varying circles around them.
>>> 
>>> Thank you for pointing me into the right direction.
>>> 
>>> Cheers,
>>> Phil
>> 
>> Give d.vect.thematic a try.
> 
> for bubble plots also try 'd.vect.chart ctype=pie' with only one data
> column, size column.
> or try 'v.buffer bufcol='  (sometimes buggy)
> 
> 
> 
> Hamish