Re: [ferret_users] contour labels

["William S. Kessler" <William.S.Kessler@xxxxxxxx>]

In a word: No!

The contour drawing algorithm in Ferret is decades old code from  
Plotplus, which was based on even earlier code that Roger Lukas put  
together for his thesis, and before that from someone named Thompson  
at the Canadian Bureau of Mines in Ottawa in 1967 (details a little  
hazy). Really, really old code. As you have found, the controls on  
contour labeling are indirect at best, and not very user-manipulable.

A very crude solution, extremely user-intensive and only useful for a  
final publication plot, is to draw each contour level separately and  
overlay them (contour/over/nolab/lev=/col=). Then you can use the  
various PPL controls (CONSET) to work on each contour line  
separately, and probably be able to get the result you want. It will  
require a lot of experimentation!

Billy K

On Jul 7, 2007, at 3:36 PM, David Wang wrote:

> Hi Ferreters,
>
> the mailing achieve is not reachable right now. i hope this is not  
> a redundant question.
>
> i'd like to label one and only one numerical value on each of my  
> closed contours. i played around with the contour/spacing qualifier  
> but either some contours get no label or more than one identical  
> labels crowd on one contour. do i miss anything simple here to  
> perfect my contour plots this way?
>
> thanks,
> d.