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Re: draw mark on lon_lat plane



Hi Gaorz,
The polymark script will do this nicely.   See  the script via:
yes? go/help polymark
There's an example in the polymark script, along with a list of
the available symbols.  You define one or more longitudes and
latitudes, draw the underlying plot, and  overlay with polymark.
Another simple example.
use coads_climatology
set region/l=1/x=160:190/y=-10:10
fill sst

! we'll plot symbols at (180,0)  and (182,4)
let xpts = {180,182}
let ypts = {0, 4}
let markval = {1,1}    ! arbitrary

go polymark polygon/over/ xpts, ypts, markval, circle, 0.5


gaorz wrote:

Does anyone know how to draw a mark on the Lon_Lat plane by specifying its longitude and latitude?  Gaorz

 

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