Re: [ferret_users] County maps for Ferret

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

Hi Bill,
The data we download to create the datasets containing outlines is from 
the "pscoast" tool in the GMT software, as outlined in the Ferret FAQ
http://ferret.pmel.noaa.gov/FERRET_17sep07/FAQ/graphics/coastlines.html

That source does not include data for outlines of counties, and I'm not 
aware of any source for that data. The coastline-extractor mentioned in 
our FAQ page contains political boundaries, but I believe that consists 
only country and state boundaries as well.As you say, it must be 
available somewhere.  The data consist of (lon,lat) pairs, separated by 
a missing-value where the pen should pick up, so the Ferret command to 
plot them is just

  plot/vs/line lon_data, lat_data.

Ansley

Gustafson, William I wrote:
> Hi,
>
> I did a quick search of the Ferret archives but did not see anybody asking about this before. Has anybody generated a file that could be used to draw U.S. county lines on a map similar to land_detail for the states and rivers? The data must be out there somewhere.
>
> I've looked at how land_detail handles the state boundaries. I'm assuming it is not trivial to get the lat/lon pairs setup so that all the lines connect at the right places.
>
> Thanks for any suggestions.
>
> -Bill
> _______________________________________________
> William I. Gustafson Jr., Ph.D.
> Scientist
> ATMOSPHERIC SCIENCES AND GLOBAL CHANGE DIVISION
>
> Pacific Northwest National Laboratory
> P.O. 999, MSIN K9-30
> Richland, WA  99352
> Tel: 509-372-6110
> William.Gustafson@xxxxxxx
> http://www.pnl.gov/atmospheric/staff/staff_info.asp?staff_num=5716
> http://www.researcherid.com/rid/A-7732-2008
>
>