[GRASS5] on d.vect.thematic

[Michael Barton]

Maciek,

1. All the thematic options calculate 'breakpoints' where the color change
in the thematic map: at a set of regular intervals (the number of intervals
defined by the user), 2 standard deviation units around the mean, quartiles,
and custom. The custom option just lets you define manually where the color
changes rather than having it determined by an algorithm (as it is for other
3 options).

2. You can put values into the GRASSRGB column for all vector types.
Currently d.vect only displays colors in this column for areas. According to
Hamish, this is being extended to lines and points.

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

voice: 480-965-6262; fax: 480-965-7671
www: http://www.public.asu.edu/~cmbarton


> From: Maciek Sieczka <werchowyna at epf.pl>
> Date: Mon, 30 May 2005 20:55:10 +0200
> To: grass devel <grass5 at grass.itc.it>
> Cc: <michael.barton at asu.edu>
> Subject: [GRASS5] on d.vect.thematic
> 
> Michael,
> 
> Could you please answer these two questions?
> 
> 1. What is option breakpoints for?
> 
>     All that is in the manual:
> 
> breakpoints=string Break points for custom breaks option. Separate values by
> spaces. (0 10 20 30 ...)
> 
>     is not informative for me. Might be that for some others too.
> 
> 2. Why GRASSRGB for areas only? Could it be extended to lines and points?
> 
> Maciek
>