Hi Nicolas,

On Mon, Mar 15, 2021 at 7:57 PM Nicolas Raggueneau <
[email protected]> wrote:

> Hi All,
>
> France Geographical Institute (IGN) is distributing some of its data
> with an Open Licence here:
> https://geoservices.ign.fr/documentation/diffusion/telechargement-donnees-libres.html#plan-ign
> In particular there is a pack with zoom levels 8-12.
> I've loaded them in Geoserver, each level in its own ImageMosaic
> store/layer, and I've created an aggregate with all the layers and SLD
> sheet to switch from one layer to another in the TMS.
> I've added tile blocks, overviews and masks according to geosolutions'
> tutorial (awesome)
>
> Problem is the output is not very good looking, in particular the place
> names are not very readable.
>

Can you share a couple of images showing the rendered output?


> So here are the two options that we have in mind to improve the rendering
> but so far it's not very effective:
> - Increase tile dimensions to 1024x1024 - problem is that it messes with
> the gridset tile footprint without much improvement on quality
> - enable interpolation on layers  - no visible improvement
> - adding overviews - no visible improvement
>
>
Which resampling are you using to generate overviews?

Regards,
Daniele


> Is there any other option? With the same tile size if i use mapnik
> rendered tiles i don't have this issue so there may be another way...
>
> regards,
>
> Nicolas
>
>
>
>
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>
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>
>
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>


-- 
Regards,
Daniele Romagnoli
==
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==

Ing. Daniele Romagnoli
Senior Software Engineer

GeoSolutions S.A.S.
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Italy
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Please make sure you read the following two resources before posting to this 
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- The GeoServer user list posting guidelines: 
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If you want to request a feature or an improvement, also see this: 
https://github.com/geoserver/geoserver/wiki/Successfully-requesting-and-integrating-new-features-and-improvements-in-GeoServer


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