[gdal-dev] COG via HTTP POST

Javier Jimenez Shaw j1 at jimenezshaw.com
Tue Jan 2 04:43:59 PST 2024


Thanks Even.

I will tell them about the missing SRS

On Tue, 2 Jan 2024, 13:39 Even Rouault, <even.rouault at spatialys.com> wrote:

> Javier,
>
> According to https://httpwg.org/specs/rfc7233.html#header.range , HTTP
> Range requests only apply to GET requests.  So COGs delivered through POST
> can indeed only be usable after full download.
>
> BTW, someone should ask CNIG to include GeoTIFF SRS tags. At least, for
> file pnt_sentinel2_2020_invierno_mosaico_islas_canarias_b843_hu28_8bits.tif
> which has only ModelTiepointTag and ModelPixelScaleTag geotiff keys giving
> the geospatial extent, but no CRS keys.
>
> Even
> Le 02/01/2024 à 13:14, Javier Jimenez Shaw via gdal-dev a écrit :
>
> Hi
>
> Does it make any sense to provide COG via HTTP POST method?
> If I understand correctly, the "magic" of downloading only what is needed
> from the server is done with HTTP Range requests. But I am not sure if that
> works in POST method (it does work in GET method, when enabled ;).
> In case it could work with POST, I do not know how to tell GDAL or QGIS to
> use a POST method.
>
> Why am I asking this? the CNIG (Natial Center of Geographic Information in
> Spain) is doing it.
> https://centrodedescargas.cnig.es/CentroDescargas/index.jsp The link is
> just the starting point. Unfortunately they do not provide link to the
> final page where you can download the files (yes, ugly).
>
> So for now I have to download the full file, and do whatever I want later.
>
> Thanks
> Javier
> .___ ._ ..._ .. . ._.  .___ .. __ . _. . __..  ... .... ._ .__
>
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> -- http://www.spatialys.com
> My software is free, but my time generally not.
>
>
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