On Mon, Jul 27, 2015 at 11:58 PM, Marcelo de Moraes Serpa <
celose...@gmail.com> wrote:

> *bump*
>
> I just would like to know how to render the rendering transformation as
> tiles. Does anyone know?
>

Some rendering transformations are built to be tiled, some are not.
The heatmap one is definitely not, the algorithm currently implemented
makes no sense when tiled (as it changes
the output taking into account everything in the requested bounding box,
and if you slice it, you change
the input data).

If what you want to depict is not point density, but some representation of
one of their attributes,
you might want to try the Barnes surface interpolation... while I have no
experience with it,
by a quick look at the code, it seems it might tile correctly (at least,
there seems to be some
effort in that direction in the code, no idea if it works)

The process has never been documented in GeoServer docs by its original
author (Martin Davis),
but there is something lying around in the net:
http://lin-ear-th-inking.blogspot.it/2012/02/barnes-analysis-for-surface.html
http://suite.opengeo.org/4.1/cartography/rt/barnes.html

If this is not what you're looking for, rendering transformations are
pluggable, so you can
either write your own, or have someone write it for you, see
http://geoserver.org/support/

Cheers
Andrea


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