[gdal-dev] How to debug the shape open option "encoding"?

[Andrew C Aitchison]

On Fri, 11 May 2018, Rahkonen Jukka (MML) wrote:

> I need to run a certain job that requires open option
> "-oo encoding="ISO_8859-1" and while it runs fine on Windows with the
> OSGeo4W installation with version GDAL 2.2.4, released 2018/03/19 it
> leads to loads of warnings "Warning 1: Value of field 'name_field'
> is not a valid UTF-8 string." with the gisinternals installation
> GDAL 2.3.0dev, released 2017/99/99.
>
> The shapefiles which I have are really using ISO_8859-1 and
> gisinternals version handles them OK without using the open option,
> except one. The problematic one does not have the LDID "87 / 0x57"
> flag in the .dbf part and therefore it is interpreted as UTF-8 if I
> do not use the open option. If I use the open option the
> gisinternals version prints the warnings about all the

> Shape: Treating as encoding 'ISO_8859-1'.
> Shape: Cannot recode from 'ISO_8859-1'. Disabling recoding
>
> Is there anything else that an end user could do for finding out why
> the gisinternals build fails with recoding?  BTW is it documented
> somewhere which are the correct values for different encodings?
> For example in my case I had to use exactly "-oo encoding="ISO_8859-1".

... with an odd number of quotes ? Wierd.

-- 
Andrew C. Aitchison					Cambridge, UK
 			andrew at aitchison.me.uk