[Geoserver-users] HeatMap and tiles maps

Hi

I would like to use geowebcache behind my heatmap transformed data but it
looks like it is not possible. I get a similar effect to that outlined in
http://gis.stackexchange.com/questions/56697/wms-bounded-overlay-with-openlayers-and-geoserver
basically that the tiles are disjointed http://i.stack.imgur.com/ydBSN.png.
As I can't get the correct tiled effect working geowebcache is out of the
question.

I know the docs state clearly that

/Rendering transformations may not work correctly in tiled mode, unless they
have been specifically written to accommodate it./

I am just wondering if there is plan to fix this? I can't see anything in
JIRA

Thanks,
J

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Hi,
If you can’t see a JIRA I’d encourage you to open one.

One possible way around this is to pre-render your heatmap outside of GeoServer initially and then load it as a regular raster. Very suboptimal, but should work in the interim if there’s only one or two and it doesn’t change.
Regards,
Jonathan

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···

On 6 November 2013 00:42, osullivj <jeremiahosullivan@anonymised.com> wrote:

Hi

I would like to use geowebcache behind my heatmap transformed data but it
looks like it is not possible. I get a similar effect to that outlined in
http://gis.stackexchange.com/questions/56697/wms-bounded-overlay-with-openlayers-and-geoserver
basically that the tiles are disjointed http://i.stack.imgur.com/ydBSN.png.
As I can’t get the correct tiled effect working geowebcache is out of the
question.

I know the docs state clearly that

/Rendering transformations may not work correctly in tiled mode, unless they
have been specifically written to accommodate it./

I am just wondering if there is plan to fix this? I can’t see anything in
JIRA

Thanks,
J


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Jonathan

Thanks very that

Any pointers for doing the heatmap offline. I like the way that the
geoserver implementation recalculates at each zoom step...would I need to
create a raster for each step?

Thanks,
H

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Hi,
If you look at this document:
http://demo.geo-solutions.it/share/foss4g2013/gs_steroids_sgiannec_foss4g2013_01.03.pdf
From page 10 onwards it says how to prepare GeoTiffs. Part of this includes creating pyramids which are for different zoom levels.

So you’d create one detailed raster (Ideally a Geotiff, but other formats could be done), and then go through the stuff in there to optimise it for GeoServer.
Not sure if that’s what you want, but it’s one possible solution.
Jonathan

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···

On 6 November 2013 23:20, osullivj <jeremiahosullivan@anonymised.com> wrote:

Jonathan

Thanks very that

Any pointers for doing the heatmap offline. I like the way that the
geoserver implementation recalculates at each zoom step…would I need to
create a raster for each step?

Thanks,
H


View this message in context: http://osgeo-org.1560.x6.nabble.com/HeatMap-and-tiles-maps-tp5087557p5087778.html
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November Webinars for C, C++, Fortran Developers
Accelerate application performance with scalable programming models. Explore
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