[gradsusr] North Arrow

[Tim Van Damme]

Hello Joe,

 

I am not sure if you can plot this straight from GrADS, but I know there is a workaround. 

If for example you plot a chart at 800 x 600 pixels, you can always create a transparent overlay with a compass and a scale. 

 

For example: I plot a chart that defines the chance of thunderstorms. The outcome of the formula is a number between -12 and 12, but that makes it difficult for people to understand, so I created an overlay that says: very low chance – low chance – medium chance – high chance – very high chance.

 

To use the overlay you need to make sure the png file is situated in the folder where the chart is plotted, and it needs to have the same size. 

 

Then use ‘gxprint filename.png x800 y600 –f overlayimagename.png’

 



 

 

Met vriendelijke groeten,

 

Tim Van Damme

+32 499 61 25 61

 <mailto:tim at stormcell.be> tim at stormcell.be

 

From: gradsusr [mailto:gradsusr-bounces at gradsusr.org] On Behalf Of Joe Nayo
Sent: 07 March 2019 08:27
To: gradsusr at gradsusr.org
Subject: [gradsusr] North Arrow

 

Dear GrADS Users,

Is there a way of displaying a north arrow and scale on a map?

Any help will be appreciated,

Joe.    

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