Re: "getting" the coast line

[Ansley Manke <ansley.b.manke@xxxxxxxx>]

Hi Jean,
The code that Ferret calls to draw contours is deep down in the PlotPlus 
package.  It's done in page coordinates rather than the original 
physical coordinates, and is computed as the drawing is done.  It is not 
saved in memory.  It would of course be possible to put in a hack to 
write out these values and the scaling that's used, but it's not 
possible to get this out directly.

Might an answer be to regrid to a very fine grid and see where the 
result crosses zero, perhaps with the @EVNT transformation?

Another resource is the coastline extractor tool, which is described in 
this FAQ: "detailed coastlines and borders" at
http://www.ferret.noaa.gov/Ferret/FAQ/graphics/coastlines.html

Ansley

Jean.C.Newman@noaa.gov wrote:

> Does anyone have a ferret script that lets you output the location(x,y)
> of a contour line? Say the locations of the 0 contour level of
> bathymetry/topography. Jean
> _____________________________________________________________________
> | Jean Newman                                     Tel: 206-526-6531 |
> | Tsunami Program, NOAA/PMEL/OERD - UW/JISAO      FAX: 206-526-6485 |
> | 7600 Sand Point Way NE, Bldg. 3            jean.c.newman@noaa.gov |
> | Seattle, WA 98115-6349                       jcn@u.washington.edu |
> _________________________.   URL: http://www.pmel.noaa.gov/tsunami/ |
>                         (____________________________________________
>
>
>