[gradsusr] KML vectors or barbs

[Matt Alonso]

Not sure about doing it w/in grads itself but have you considered doing it
in a separate kml file?  It is really kludgy but there are only 2 ways I
know of to approach this.

1) Brute force it by creating images of all the possible combinations of
arrows/vectors and then referencing the appropriate one in your script to
build the kml.

2) This is a derivation of #1 and requires that you can make use of a
server-side language like php.  Basically you set the icon to be a
specially formatted url which will render the appropriate icon (e.g.
http://example.com/windbarb.php?spd=10&dir=320).  This is how wunderground
displays the wx station barbs on their wundermap.

Cheers,
Matt

On Tue, Sep 4, 2012 at 12:40 PM, Travis Wilson <sk8ter0028 at hotmail.com>wrote:

>  Hello,
>
>                 The kml feature in grads is quite useful for polygons and
> contours.  I was wondering if it is possible (or will be) to plot wind
> barbs or vectors using the kml line/poly function?  A tif image overlay of
> winds vectors is not what I want.  Here is an example of a google earth
> animated kml I have created using grads, adding wind vectors/barbs would be
> extremely useful (
> http://www.atmos.ucla.edu/~wilson28/pages/googletemps_wide.html).
>
> Thank you,
>
> Travis
>
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