[Geoserver-devel] community module for quantized-mesh output format?

GeoServer GeoServer Developer
1

Are there any current efforts to implement quantized-mesh-1.0 output format? Has there been any interest in it?

···

Jason Newmoyer
Newmoyer Geospatial Solutions
843.606.0424
jason@anonymised.com

2

To save others googling the URL should be https://cesiumjs.org/data-and-assets/terrain/formats/quantized-mesh-1.0.html

It looks interesting but I don’t know if anyone is planning an implementation.

Ian

···

On 28 September 2016 at 20:01, Jason Newmoyer <jason@anonymised.com> wrote:

Are there any current efforts to implement quantized-mesh-1.0 output format? Has there been any interest in it?

Jason Newmoyer
Newmoyer Geospatial Solutions
843.606.0424
jason@anonymised.com

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–

Ian Turton

3

Ditto, I’m not aware of anyone working on it, but it would be cool to have one.

I do have some familiarity with it, what are you going to use to build the TIN model? Are you going to compute
it on the fly from raster data, with some hint about the current scale to generate an accurate, but not too accurate,
model?

Cheers
Andrea

···

On Thu, Sep 29, 2016 at 9:55 AM, Ian Turton <ijturton@anonymised.com> wrote:

To save others googling the URL should be https://cesiumjs.org/data-and-assets/terrain/formats/quantized-mesh-1.0.html

It looks interesting but I don’t know if anyone is planning an implementation.

Ian

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On 28 September 2016 at 20:01, Jason Newmoyer <jason@anonymised.com> wrote:

Are there any current efforts to implement quantized-mesh-1.0 output format? Has there been any interest in it?

Jason Newmoyer
Newmoyer Geospatial Solutions
843.606.0424
jason@anonymised.com

Geoserver-devel mailing list
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–

Ian Turton

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4

Le jeudi 29 septembre 2016 10:13:12, Andrea Aime a écrit :

Ditto, I'm not aware of anyone working on it, but it would be cool to have
one.

I do have some familiarity with it, what are you going to use to build the
TIN model? Are you going to compute
it on the fly from raster data, with some hint about the current scale to
generate an accurate, but not too accurate,
model?

Support for quantized mesh was discussed in the Cesium Terrain Builder project
(C++, based on GDAL), but I'm not sure this went further. Anyway some
potentially useful references in this ticket:

Even

Cheers
Andrea

On Thu, Sep 29, 2016 at 9:55 AM, Ian Turton <ijturton@anonymised.com> wrote:
> To save others googling the URL should be https://cesiumjs.org/data-
> and-assets/terrain/formats/quantized-mesh-1.0.html
>
> It looks interesting but I don't know if anyone is planning an
> implementation.
>
> Ian
>
> On 28 September 2016 at 20:01, Jason Newmoyer <
>
> jason@anonymised.com> wrote:
>> Are there any current efforts to implement quantized-mesh-1.0 output
>> format? Has there been any interest in it?
>>
>> Jason Newmoyer
>> Newmoyer Geospatial Solutions
>> 843.606.0424
>> jason@anonymised.com
>>
>>
>>
>> ------------------------------------------------------------
>> ------------------
>>
>> _______________________________________________
>> Geoserver-devel mailing list
>> Geoserver-devel@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/geoserver-devel
>
> --
> Ian Turton
>
> ------------------------------------------------------------
> ------------------
>
> _______________________________________________
> Geoserver-devel mailing list
> Geoserver-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/geoserver-devel

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5

I did see plans for a (large) organisation to use Cesium with GeoServer.

I'm trying to find the detail, but it did involve an external plugin, perhaps
https://github.com/kaktus40/Cesium-GeoserverTerrainProvider or something like
that.

Brad

6

We have been prototyping a global terrain layer with Cesium using the GeoServerTerrainProvider (kaktus40) with 90m SRTM (CGIAR). Performance is not great compared to AGI’s public quantized-mesh data using CesiumTerrainProvider, which I believe relates to the fact that qm is multiresolution and by nature much smaller payloads and quicker to process by Cesium. Also, with GeoServerTerrainProvider you must make some assumptions about the level of detail (LOD) of your data. This will make things tricky when we get special collects like Lidar for specific areas and we ultimately want to mosaic that right into a single global elevation layer.

I see this as very similar to vector tiles in that 1) its a new general output format to implement for GeoServer, 2) integrates seamlessly with GeoWebCache and 3) to address Andrea’s question, it must be capable of on-the-fly simplification using scale hint. So, from raster source to TIN geometries to quantized-mesh on the fly.

It seems like we have some decent interest. And a few projects out there doing pieces and parts of this:

https://github.com/geo-data/cesium-terrain-builder
https://github.com/loicgasser/quantized-mesh-tile

I wonder if LibCTB implemented qm-1.0 and then exposed a method for us to generate just a single terrain file if that would save some work.

···

On Thu, Sep 29, 2016 at 6:12 AM, Brad Hards <bradh@anonymised.com> wrote:

I did see plans for a (large) organisation to use Cesium with GeoServer.

I’m trying to find the detail, but it did involve an external plugin, perhaps
https://github.com/kaktus40/Cesium-GeoserverTerrainProvider or something like
that.

Brad

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Jason Newmoyer
Newmoyer Geospatial Solutions
843.606.0424
jason@anonymised.com…