[iTowns-user] How can I pull initial zoom level imagery from local files?

[Terek Campbell]

Thanks for the suggestion! After you mentioned that a FileSource wouldn't
work and thus I can't pull my images directly from image files client side
I realized that for my purposes I didn't need my server side code to follow
any particular standards. So client side I left it as a WMTSSource and made
a simple server-side implementation that parses the (WMTS) url for the
TILEMATRIX, TILECOLUMN, and TILEROW, and returns the corresponding image.

~Terek Campbell


On Mon, Aug 12, 2019 at 2:12 AM Adrien Berthet <Adrien.Berthet at ign.fr>
wrote:

> Hello Terek,
>
> Indeed, a FileSource is not adapted here, as (if I understand correctly)
> you have multiple images per level. What you can do is using TMSSource (
> http://www.itowns-project.org/itowns/docs/#api/Source/TMSSource), that
> only need a classic web server, as files are typically organized in
> directory here, or even all files as the same level. Files are accessed
> with a simple fetch request, with to special parameters in the url beside
> x/y/z.
>
> Note also that using FileSource for displaying an image is not working
> correctly at the moment, that's something we would like to spend some time
> on when we got some time.
>
> Adrien
> ------------------------------
> *De :* ITowns-user [itowns-user-bounces at lists.osgeo.org] de la part de
> Terek Campbell [terekc at gmail.com]
> *Envoyé :* vendredi 9 août 2019 22:25
> *À :* itowns-user at lists.osgeo.org
> *Objet :* [iTowns-user] How can I pull initial zoom level imagery from
> local files?
>
> Hello,
>
> I'd like to store the initial camera's zoom level's images (25 million
> meters) as local files so that if a connection to our GeoServer is
> unavailable, there will still be a low resolution view of the globe
> available.
>
> My thought was to use an iTowns.FileSource combined with a config similar
> to iTown's Ortho.json but with all but the first couple tileMatrixSetLimits
> removed. Then having my second imagery layer providing all zoom levels
> after 3 by the typical means.
>
> I'm not sure how to use a FileSource to pull imagery data locally. Can
> anyone shed some insight?
>
> ~Terek Campbell
>
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