[PROJ] Geo TIFF non-ASCII encodings

[Even Rouault]

Le 05/04/2024 à 13:46, Javier Jimenez Shaw a écrit :
> Latin1 in wkt name? What I remember was a reduced set of ascii chars.

cf https://docs.ogc.org/is/18-010r7/18-010r7.html

<crs name> ::= <quoted Latin text>  (paragraph 8.1  )

and https://docs.ogc.org/is/18-010r7/18-010r7.html#15

but you're right calling this Latin1 is a bit misleading. Th only 
non-ASCII character allowed in this "quoted Latin text" rule, as far as 
I can see, is the degree symbol.

>
> On Fri, 5 Apr 2024, 12:59 Even Rouault via PROJ, 
> <proj at lists.osgeo.org> wrote:
>
>     Hi,
>
>     OGC GeoTIFF mostly formalizes the historical GeoTIFF 1.0
>     specification from 1995, and UTF-8 at that time was still in its
>     youth years. Not to be mentioned that GeoTIFF was initially
>     developed by NASA' JPL, so I assume ASCII was good enough at that
>     time for their purpose. As far as I can see all EPSG CRS names as
>     currently only use ASCII. It is true though that WKT CRS
>     potentially allows for more than ASCII for CRS name, but only in
>     the Latin1 character set.
>
>     Anyway this would be more a topic for an issue at
>     https://github.com/opengeospatial/geotiff/issues . I've added a
>     note to the existing
>     https://github.com/opengeospatial/geotiff/issues/56#issuecomment-2039505940
>
>     Even
>
>     Le 05/04/2024 à 12:44, Mircea Neacsu via PROJ a écrit :
>>     Hello,
>>
>>     I had to read a bit deeper the Geo TIFF 1.1 standard and I was
>>     quite surprised to see that in doesn't allow any character
>>     representation outside the 7-bit ASCII text. Am I missing something?
>>
>>     In particular CitationGeoKeys that are mandatory in certain cases
>>     do not allow for anything other than ASCII text. Seems a bit
>>     strange for an international standard.
>>
>>     -- 
>>
>>     Mircea Neacsu
>>
>>
>>
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>
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