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plotting a tropical cyclone symbol [message #94499] Wed, 14 June 2017 09:26 Go to previous message
Brian McNoldy is currently offline  Brian McNoldy
Messages: 35
Registered: July 2000
Member
Something that several users of this language would likely find useful is the tropical cyclone symbol (basically a circle with two spiral arms sticking out).

In Hershey fonts, one variety exists: in the Miscellaneous font set, it is the "<" character ( https://www.harrisgeospatial.com/docs/html/images/font20.gif). With the TEXT function, it can be created using:
t=text(x,y,"<",font_name="Hershey 20")

However, that symbol has variants that would be extremely useful if they were available. If the symbol is filled in, it represents a hurricane; if it's unfilled, it represents a tropical storm. But the same two symbols should exist for the southern hemisphere too; the unfilled or filled symbol would be flipped upside-down.

These four symbols would be excellent to have in IDL... All four symbols are already available in NCL:
https://www.ncl.ucar.edu/Document/Graphics/Images/font35.png ("k" and "m")
https://www.ncl.ucar.edu/Document/Graphics/Images/font37.png ("p" and "s")

Anyone have any insights into this?

Thank you!!
Brian

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