On 11/26/2012 12:29 PM, Luke M wrote:
Hi Steve & Sudeer
thank you for your feedback. Indeed, I am still trying to
figure out the command for creating a simple location box on a
map that goes around the Greenwich meridian.
Any thoughts on how to go about doing this?
The paragraph below suggests two methods that will work. Suggestion
"a" is simply to use the coordinate domain 20:380 when specifying
the longitude limits of your box.
On Fri, Nov 23, 2012 at 2:28 PM, Steve
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
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
! 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
! Use "detailed" together with a spectrum
! Use "all" to plot oceans as well as
! 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:
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
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
Any suggestions on how I can do this?