Re: [udig-devel] Single Band Raster Styling

[andrea antonello <andrea.antonello@xxxxxxxxx>]

Hi Emily,

> I'll pass on the massive raster for now :)  I was able to get a similar
> error with something else I was testing.  Perhaps when I update you can test
> again for me.

Sure thing!

[...]
> The "Compute Values" dialog has very little to do with sld.  It basically
> computes a set of numbers.
> For example, for equal intervals it computes the min and max of the raster
> and divides it by the number of intervals you requested.  The "values to
> ignore" are values that are not taken into account when computing the min
> and max.
>
> So if your raster has the value -9999,0-10 and you don't put anything in the
> "values to ignore" dialog you'll get breaks of -9999, -8998, -7997, ... 10.
> If you put -9999 in the "values to ignore" box then you will get breaks of
> 0,1,2....10.

ok, which sounds reasonable. So when it comes to style, they are
indeed ignored and no longer available.

> For your issue of the collar when reprojection orthophotos, you will need to
> add an extra row to the map theming table (on the main page) with an opacity
> of 0, value of the "collar" value, and a label of "-no data-" (if you don't
> want it to show up in the legend).

Ok. In the ortophoto case it is a bit more complicated, since it is
not single banded, but that is not the topic here, since the styler is
single banded.

> At one point in the past you mentioned NaN numbers in rasters - I get the
> impression the geotools styling engine does not support this?  As soon as I
> put a NaN value in the sld, all other styling is ignored. Perhaps I am doing
> something wrong.

No, you are right, geotools already handles them and ignores them when
rendering.
So they simply do not appear.
The problem I found sometimes, is that in the case of adf esri
binaries, the novalue is not handled properly, being (from memory) a
Float.MAX_VALUE or something similar. In that case it is handy to be
able to set it. That applies to styling, if you are doing processing,
then you will need to remove them anyways with some mapalgebra.

One more question. I see you created a new plugin, which is a bit
against the try we are having to merge plugins instead of adding new.
Is this bound to the need of the plugin's namespace? Your styler
should really replace my single band raster styler, since it is
better. Let's discuss how to best proceed.

Cheers,
Andrea



>
>
> Emily
>
>
>
>
>
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