[ncl-talk] sub: Polyline using the netcdf mask file

[Dennis Shea]

Also, a polyline requires One dimensional   arguments: x[*], y[*] ..... ->lon[*],lat[*]

Each line or polygon  must be drawn separately

Sent from my iPhone

> On Jul 27, 2020, at 2:49 PM, Rick Brownrigg via ncl-talk <ncl-talk at mailman.ucar.edu> wrote:
> 
> 
> I don't understand the goal -- do you want a polyline or polymarker?  If a line, a line that looks like what?  What have you tried so far?
> 
> Rick
> 
>> On Mon, Jul 27, 2020 at 2:10 PM dale zuri via ncl-talk <ncl-talk at mailman.ucar.edu> wrote:
>> 
>> Hi NCL user,
>> I have been trying to add a polyline to the map, but ended up drawing nothing. I have a mask netcdf with numbers ranging from 0-19.  
>> Mask = where(masktracer.eq.j, 1, 0) 
>> I would like to draw a polyline wherever the Mask is equal to 1. I would appreciate any recommendation to help. 
>> 
>> 
>> Thanks
>> Dale
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