[ncl-talk] Grainy image

[Rick Brownrigg]

Hi Tim,

I don't know for certain without looking at the data, but I have to imagine
its manifest in the data itself, and that in those regions you mentioned
the probability is hovering right around 50%.  The color contrast between
40% and 50% is rather abrupt, relative to the rest of the successive
colors, which I think draws attention to the fluctuations. There also
appears to be similar fluctuations going on in Montana and Minnesota, but
its harder to see because those colors "closer" to each other, perceptually.

FWIW...
Rick


On Thu, Jan 10, 2019 at 9:52 AM Tim Risner <trisner at awis.com> wrote:

> I'm curious as to what may be causing a grainy section in Central
> Mississippi and SE Ohio of the attached image.
> I'm using "RasterFill" and cnRasterSmoothingOn is set to True.
> trGridType of all types causes it.
> Data is pretty uniform in those regions.
>
>
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