Hi Luke,
First guess (w/out actually trying your commands) is that you are
having an issue about the encoding of the dateline. By default the
GO fland script doesn't specify anything about the longitude branch
point, so the longitude branch point is inherited from the
underlying etopo data set. That family of datasets, I believe, go
round the earth from 20E(20) to 20E (380). (To see this try the
commands use etopo60; show grid rose) So you either need
to a) specify the longitude range of your box to be in the domain of
20:380 -- OR -- b) pre-set the longitude encoding of your base map
by using argument 5 of fland.jnl. Here is the output of
yes? go/help fland
! usage: arg1 arg2 arg3
arg4 arg5 arg6
! GO fland [resolution] [palette] [overlay_style]
[detail] [x=lo:hi] [y=lo:hi]
! arg 1 - resolution - may be 120,60,40,20,10, or 5
default=20
! To use resolution "nnn" the file etoponnn must
exist.
! arg 2 - palette - may be any palette on your system.
Normally solid colors
! like black, gray,red, etc. (see
Fpalette '*') default=gray
! arg 3 - overlay_style - "basemap", "transparent", or
"overlay" (default)
! arg 4 - detailed - may be "detailed", "all" or "solid"
default=solid
! Use "detailed" together with a spectrum like
dark_terrestrial
! Use "all" to plot oceans as well as land.
! arg 5 - longitude limits - specify as for any FERRET
longitude range
! arg 6 - latitude limits - specify as for any FERRET
latitude range
Hope this helps - Steve
==========================================================
On 11/23/2012 2:32 PM, Luke M wrote:
Hi everyone,
I'm trying to plot a simple box outline over a map to show the
location of a particular area. Using Ferret v6.82, if I do the
following command, I get a nice box outline over southern
Australia:
set region x=100E:100E/y=-90:90
yes? go fland 20 white
go fland
plot/vs/over/nolab/line=10
{-135,-140,-140,-135,-135},{-32,-32,-36,-36,-32}
However, I am having difficulty trying to plot the following two
boxes:
a. over the south-central Pacific Ocean (160W through 100W, and
40S to 20S)
b. over the British Isles (5W through 5E, and 45N through 60N)
Any suggestions on how I can do this?
Thanks!
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